Nayara Monteiro Barreiros, Tommaso Giarrizzo, Bruno Spacek Godoy
Abstract: Aim Additive diversity partitioning has been used to explain the accumulation of diversity at different spatial scales with relative success. In lotic ecosystems, the spatial extent is extremely relevant in studies of diversity accumulation, because it encompasses environmental variation that causes changes in the observed communities. Despite of previous knowledge on the effect of extent on biological communities and diversity accumulation, little is known about the topic in aquatic insect communities in large rivers. In this context, we studied the effect of spatial extent and environmental variation on diversity components, alpha and beta, in Ephemeroptera, Plecoptera and Trichoptera (EPT) groups in Xingu River rapids. Methods The sampling was carried out in October 2015 in the dry period of the region, in nine rapids in the Xingu, Bacajá and Iriri rivers. At each collection site, five Surber samples were taken. We also recorded pH, dissolved oxygen, electrical conductivity, water temperature, and geographic coordinates. We used additive diversity partitioning to separate the diversity components α and β. For the spatial component, we generated the spatial filters using PCNM (Principal Coordinates of Neighbour Matrices) and partitioned the variance between space and environment using partial Redundancy Analysis (pRDA). Results We collected 12,249 individuals in 27 genera within 11 families in the EPT orders. The greatest accumulation of diversity was observed among rapids of the river, when the β diversity in this spatial extent was greater than the expected. The spatial structure was an indirect effect at this extent, since it is a relevant drive to environmental variables. Conclusions The results indicate that the effect of spatial extent on rapids is a contributing factor in the diversity components of aquatic insect communities in large river rapids. To the conservation and management of this environment is necessary cover as many rapids as possible, since the preservation of only a few rapids can mean a substantial loss of regional diversity.
{"title":"Beta diversity of Ephemeroptera, Plecoptera and Trichoptera on multiples spatial extents in Xingu River rapids","authors":"Nayara Monteiro Barreiros, Tommaso Giarrizzo, Bruno Spacek Godoy","doi":"10.1590/s2179-975x2923","DOIUrl":"https://doi.org/10.1590/s2179-975x2923","url":null,"abstract":"Abstract: Aim Additive diversity partitioning has been used to explain the accumulation of diversity at different spatial scales with relative success. In lotic ecosystems, the spatial extent is extremely relevant in studies of diversity accumulation, because it encompasses environmental variation that causes changes in the observed communities. Despite of previous knowledge on the effect of extent on biological communities and diversity accumulation, little is known about the topic in aquatic insect communities in large rivers. In this context, we studied the effect of spatial extent and environmental variation on diversity components, alpha and beta, in Ephemeroptera, Plecoptera and Trichoptera (EPT) groups in Xingu River rapids. Methods The sampling was carried out in October 2015 in the dry period of the region, in nine rapids in the Xingu, Bacajá and Iriri rivers. At each collection site, five Surber samples were taken. We also recorded pH, dissolved oxygen, electrical conductivity, water temperature, and geographic coordinates. We used additive diversity partitioning to separate the diversity components α and β. For the spatial component, we generated the spatial filters using PCNM (Principal Coordinates of Neighbour Matrices) and partitioned the variance between space and environment using partial Redundancy Analysis (pRDA). Results We collected 12,249 individuals in 27 genera within 11 families in the EPT orders. The greatest accumulation of diversity was observed among rapids of the river, when the β diversity in this spatial extent was greater than the expected. The spatial structure was an indirect effect at this extent, since it is a relevant drive to environmental variables. Conclusions The results indicate that the effect of spatial extent on rapids is a contributing factor in the diversity components of aquatic insect communities in large river rapids. To the conservation and management of this environment is necessary cover as many rapids as possible, since the preservation of only a few rapids can mean a substantial loss of regional diversity.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136202447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Aim The present study investigated the influence of environmental variables on macrobenthic fauna in the Achenkovil River, Southern Western Ghats, Kerala. The knowledge of aquatic ecosystems in many remote areas is very scanty and no one has yet made an attempt to study the macrobenthic fauna of Achenkovil river. Since, macrobenthos play an important role in the benthic community structure a better knowledge of their ecology and distributional patterns in remote freshwater ecosystems would be of great interest for a better understanding of their functioning. Methods A bimonthly sampling was conducted from February 2019 to January 2020. Water samples for physicochemical analysis were carried to the laboratory in clean polyethylene bottles. The macrobenthic fauna was collected using Van Veen grab (0.025m2). Multivariate statistical technique such as Principal Component Analysis was used to monitor the variation in environmental parameters. The diversity of macrobenthic fauna was studied using Simpson_1-D, Shannon_H, Evenness_e^H/S, and Margalef’s indices. We analyzed the relationship between environmental variables and macrobenthic fauna, using Canonical Correlation Analysis and Pearson correlation. Results A total of 3563 individuals belonging to 9 orders, 32 families, 32 genera, and 32 species were identified. The most dominant order was Ephemeroptera followed by Coleoptera and Trichoptera and the least dominant was Zygoptera. The maximum number of macrobenthic fauna was observed in station 1(S1), (1461 Ind/m2) and the least in station 9 (S9), (37 Ind/m2). Station 1 (S1) is a pristine forest area, so this area is considered the reference site. The macrobenthic fauna in the pristine headwater forests (S1) was much more diverse than in the river mouth (S9) which is a highly impacted region. This region is facing various kinds of anthropogenic stress resulting in pollution and deterioration of water quality. The macrobenthic community structure in the Achenkovil River was significantly associated to the variations in water quality due to various natural as well as anthropogenic stresses. Conclusions It can be concluded that Ephemeroptera, Coleoptera, and Trichoptera were the most dominant groups in the undisturbed habitats in the river during the study period. The predominance of Chironomidae species, especially from the Chironomus genus in the midstream and downstream segments of the river is possibly due to their ability to adapt to various environmental conditions or habitats and their tolerance to the low oxygen content in anoxic conditions of the bottom sediment. The lowest abundance of macrobenthos at all the studied stations was observed at station 9 (S9) during dry seasons. S9 is a highly impacted region, characterized by high temperature, turbidity, TDS, pH, conductivity, nitrate, and phosphate values. For this reason, anthropogenic stress and changing environmental conditions are the main factors affecting the distribution of the
{"title":"Effect of water quality on macrobenthic fauna in Achenkovil River, Southern-Western Ghats, Kerala, India","authors":"Sujitha Sukumaran, Sreejai Raghavan, Beena Sarada Kurup","doi":"10.1590/s2179-975x1623","DOIUrl":"https://doi.org/10.1590/s2179-975x1623","url":null,"abstract":"Abstract Aim The present study investigated the influence of environmental variables on macrobenthic fauna in the Achenkovil River, Southern Western Ghats, Kerala. The knowledge of aquatic ecosystems in many remote areas is very scanty and no one has yet made an attempt to study the macrobenthic fauna of Achenkovil river. Since, macrobenthos play an important role in the benthic community structure a better knowledge of their ecology and distributional patterns in remote freshwater ecosystems would be of great interest for a better understanding of their functioning. Methods A bimonthly sampling was conducted from February 2019 to January 2020. Water samples for physicochemical analysis were carried to the laboratory in clean polyethylene bottles. The macrobenthic fauna was collected using Van Veen grab (0.025m2). Multivariate statistical technique such as Principal Component Analysis was used to monitor the variation in environmental parameters. The diversity of macrobenthic fauna was studied using Simpson_1-D, Shannon_H, Evenness_e^H/S, and Margalef’s indices. We analyzed the relationship between environmental variables and macrobenthic fauna, using Canonical Correlation Analysis and Pearson correlation. Results A total of 3563 individuals belonging to 9 orders, 32 families, 32 genera, and 32 species were identified. The most dominant order was Ephemeroptera followed by Coleoptera and Trichoptera and the least dominant was Zygoptera. The maximum number of macrobenthic fauna was observed in station 1(S1), (1461 Ind/m2) and the least in station 9 (S9), (37 Ind/m2). Station 1 (S1) is a pristine forest area, so this area is considered the reference site. The macrobenthic fauna in the pristine headwater forests (S1) was much more diverse than in the river mouth (S9) which is a highly impacted region. This region is facing various kinds of anthropogenic stress resulting in pollution and deterioration of water quality. The macrobenthic community structure in the Achenkovil River was significantly associated to the variations in water quality due to various natural as well as anthropogenic stresses. Conclusions It can be concluded that Ephemeroptera, Coleoptera, and Trichoptera were the most dominant groups in the undisturbed habitats in the river during the study period. The predominance of Chironomidae species, especially from the Chironomus genus in the midstream and downstream segments of the river is possibly due to their ability to adapt to various environmental conditions or habitats and their tolerance to the low oxygen content in anoxic conditions of the bottom sediment. The lowest abundance of macrobenthos at all the studied stations was observed at station 9 (S9) during dry seasons. S9 is a highly impacted region, characterized by high temperature, turbidity, TDS, pH, conductivity, nitrate, and phosphate values. For this reason, anthropogenic stress and changing environmental conditions are the main factors affecting the distribution of the ","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135107347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dávia Marciana Talgatti, Cesar Serra Bonifácio Costa, Luís Gustavo de Castro Canani, Haywood Dail Laughinghouse IV, Lezilda Carvalho Torgan
Abstract: Aim This study focused on the spatiotemporal variation of the benthic diatom community structure in salt marshes from the Patos Lagoon estuary and their relationship with environmental variables. Methods Samplings were carried out in the winter of 2010 and summer of 2011 (during El Niño and La Niña) in sites with different sediment granulometry, salinity, and distances from the Atlantic Ocean. The surface sediment was collected using a core (10 cm in diameter and 2 cm in depth) and the benthic diatoms were removed following the Trapping method, allowing the observation of live diatoms. Results The richness values (18 and 48 taxa), evenness (0.41 and 0.68), and Shannon diversity indices (2.02 and 3.31 bits/ind.) variations were not significative between the sites and seasons, although temperature and salinity differed significatively between winter and summer. However, the diatom's composition and distribution were related to temperature, salinity, and sediment particle size. Mainly the species Hippodonta hungarica, Luticola simplex Navicula cf. cryptotenelloides, N. erifuga, N. jacobii, Nitzschia filiformis var. conferta, Planothidium frequentissimum and Tryblionella calida were associated with lower temperature and lower salinity in the winter. The species Navicula cf. cryptocephala, N. phylleptosomaformis, Nitzschia pusilla, N. frustulum, N. scalpelliformis and Pseudostaurosiropsis geocollegarum were associated with higher temperature and higher salinity in the summer. Birraphid diatom taxa, mainly species of the genus Navicula and Nitzschia, were frequent or abundant in sandy sediments, and monoraphids, such as Planothidium frequentissimum, were frequent in sites where silt and clay predominated. Conclusions The composition of the benthic diatoms revealed variation between the sites in the winter and summer seasons, during El Niño and La Niña episodes. In winter, high rainfall and freshwater runoff maintained oligohaline condition in the marshes, while in summer, flooding with meso-poly-euhaline waters changed the diatom composition. The granulometry was an important factor in explaining the distribution of the birraphid and monorhapid taxa.
{"title":"Composition and structure of the benthic diatom community from salt marshes of southern Brazil and their relationship to environmental variables","authors":"Dávia Marciana Talgatti, Cesar Serra Bonifácio Costa, Luís Gustavo de Castro Canani, Haywood Dail Laughinghouse IV, Lezilda Carvalho Torgan","doi":"10.1590/s2179-975x0222","DOIUrl":"https://doi.org/10.1590/s2179-975x0222","url":null,"abstract":"Abstract: Aim This study focused on the spatiotemporal variation of the benthic diatom community structure in salt marshes from the Patos Lagoon estuary and their relationship with environmental variables. Methods Samplings were carried out in the winter of 2010 and summer of 2011 (during El Niño and La Niña) in sites with different sediment granulometry, salinity, and distances from the Atlantic Ocean. The surface sediment was collected using a core (10 cm in diameter and 2 cm in depth) and the benthic diatoms were removed following the Trapping method, allowing the observation of live diatoms. Results The richness values (18 and 48 taxa), evenness (0.41 and 0.68), and Shannon diversity indices (2.02 and 3.31 bits/ind.) variations were not significative between the sites and seasons, although temperature and salinity differed significatively between winter and summer. However, the diatom's composition and distribution were related to temperature, salinity, and sediment particle size. Mainly the species Hippodonta hungarica, Luticola simplex Navicula cf. cryptotenelloides, N. erifuga, N. jacobii, Nitzschia filiformis var. conferta, Planothidium frequentissimum and Tryblionella calida were associated with lower temperature and lower salinity in the winter. The species Navicula cf. cryptocephala, N. phylleptosomaformis, Nitzschia pusilla, N. frustulum, N. scalpelliformis and Pseudostaurosiropsis geocollegarum were associated with higher temperature and higher salinity in the summer. Birraphid diatom taxa, mainly species of the genus Navicula and Nitzschia, were frequent or abundant in sandy sediments, and monoraphids, such as Planothidium frequentissimum, were frequent in sites where silt and clay predominated. Conclusions The composition of the benthic diatoms revealed variation between the sites in the winter and summer seasons, during El Niño and La Niña episodes. In winter, high rainfall and freshwater runoff maintained oligohaline condition in the marshes, while in summer, flooding with meso-poly-euhaline waters changed the diatom composition. The granulometry was an important factor in explaining the distribution of the birraphid and monorhapid taxa.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135660534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Franciele Fernanda Kerniske, Luz Elena De la Ossa-Guerra, Roger Henrique Dalcin, Igor de Paiva Affonso, Roberto Ferreira Artoni, Vinícius Abilhoa
Abstract: Aim To investigate reproductive characteristics in a small population of Psalidodon aff. fasciatus living in isolation in an environment with a unique geological configuration, a doline-shaped depression (known as Furna 2), with a mean diameter of 80 m and water depth of 50 m, a natural heritage of the Vila Velha State Park (VVSP). Methods The fish were collected between February 2019 and January 2020 using nets and pots; standard length and total weight were measured. The gonads were also removed for histological analysis. Estimates were made for the weight-length ratio, the relative condition factor, the sex ratio, and the size at first maturity (L50 and L95) for males and females. Results The five gonadal stages that were characterized (resting, early mature, mature, partially empty, and totally empty) were consistent with what was expected for the species. The results obtained here indicate that these lambaris have an opportunistic (r) life strategy. Compared to previous studies, we discovered that fish of this population start maturing at smaller sizes. Indicating negative allometric growth, the length-weight ratio was WT = 0.0002 * LT2.3039, and the condition index (Kn = 0.95) showed no significant gender differences. When compared to other non-isolated populations of the same species, the population's sex ratio showed an unexpectedly significant male predominance (1M: 0.6 F). Conclusions Our results show an imbalance in the sex ratio, contrary to what would be expected for non-isolated populations. This imbalance may be related to the complete isolation of this environment, suggesting that females may be affected by some evolutionary force, such as inbreeding. However, other factors cannot be ruled out, as the underlying genetic mechanisms remain unknown, and only future investigations can reveal a more complete understanding of reproduction in isolated populations.
摘要/ Abstract摘要:目的研究维拉维拉州立公园(Vila Velha State Park, VVSP)自然遗产——平均直径为80 m、水深为50 m的doline-shaped洼地(Furna 2)中孤立生活小种群的繁殖特征。方法2019年2月~ 2020年1月，采用网罐法采集;测量标准长度和总重量。生殖腺也被切除进行组织学分析。对雄性和雌性的重长比、相对条件因子、性别比和初成熟尺寸(L50和L95)进行了估计。结果性腺发育的5个阶段(休眠、早熟、成熟、部分空期和完全空期)与预期性腺发育阶段一致。这里得到的结果表明，这些lambaris具有机会主义(r)的生活策略。与之前的研究相比，我们发现这个种群的鱼在更小的尺寸开始成熟。长重比为WT = 0.0002 * LT2.3039，条件指数(Kn = 0.95)性别差异不显著，为负异速生长。与其他非孤立种群相比，该种群的性别比显示出意想不到的显著的雄性优势(1M: 0.6 F)。结论我们的结果显示了性别比的不平衡，与非孤立种群的预期相反。这种不平衡可能与这种环境的完全隔离有关，这表明雌性可能受到某些进化力量的影响，例如近亲繁殖。然而，其他因素不能排除，因为潜在的遗传机制仍然未知，只有未来的调查才能揭示对孤立种群繁殖的更完整的理解。
{"title":"Reproductive aspects of an isolated population of Psalidodon aff. fasciatus (Teleostei: Characidae) from southern Brazil","authors":"Franciele Fernanda Kerniske, Luz Elena De la Ossa-Guerra, Roger Henrique Dalcin, Igor de Paiva Affonso, Roberto Ferreira Artoni, Vinícius Abilhoa","doi":"10.1590/s2179-975x1023","DOIUrl":"https://doi.org/10.1590/s2179-975x1023","url":null,"abstract":"Abstract: Aim To investigate reproductive characteristics in a small population of Psalidodon aff. fasciatus living in isolation in an environment with a unique geological configuration, a doline-shaped depression (known as Furna 2), with a mean diameter of 80 m and water depth of 50 m, a natural heritage of the Vila Velha State Park (VVSP). Methods The fish were collected between February 2019 and January 2020 using nets and pots; standard length and total weight were measured. The gonads were also removed for histological analysis. Estimates were made for the weight-length ratio, the relative condition factor, the sex ratio, and the size at first maturity (L50 and L95) for males and females. Results The five gonadal stages that were characterized (resting, early mature, mature, partially empty, and totally empty) were consistent with what was expected for the species. The results obtained here indicate that these lambaris have an opportunistic (r) life strategy. Compared to previous studies, we discovered that fish of this population start maturing at smaller sizes. Indicating negative allometric growth, the length-weight ratio was WT = 0.0002 * LT2.3039, and the condition index (Kn = 0.95) showed no significant gender differences. When compared to other non-isolated populations of the same species, the population's sex ratio showed an unexpectedly significant male predominance (1M: 0.6 F). Conclusions Our results show an imbalance in the sex ratio, contrary to what would be expected for non-isolated populations. This imbalance may be related to the complete isolation of this environment, suggesting that females may be affected by some evolutionary force, such as inbreeding. However, other factors cannot be ruled out, as the underlying genetic mechanisms remain unknown, and only future investigations can reveal a more complete understanding of reproduction in isolated populations.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136305099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marina Ferreira Moreira, Alexandre Peressin, João de Magalhães Lopes, Paulo Santos Pompeu
Abstract: Aim This study aimed to evaluate whether the upper São Francisco River basin floodplain is still used as a nursery by migratory fish and present the current status of the area’s ichthyofauna after almost 40 years since the only survey was conducted in the region. Methods Sampling occurred in seven perennial lagoons and six temporaries from São Francisco River or its direct tributaries using gillnets and trawls. Temperature, pH, and transparency of each lagoon were measured. The estimated richness was calculated, and the fish assemblage from both perennial and temporary lagoons was compared using NMDS and ANOSIM. Results Forty species were captured, of which four were non-native and three were migratory. Although there was a low abundance of migratory species, most captured individuals were juveniles. Moreover, the perennial lagoons showed higher species richness. Conclusions After almost 40 years, the floodplain lagoons of the upper São Francisco basin remain important for the recruitment of migratory species and harbor an impressive proportion of fish fauna in the upper São Francisco area. However, the reduction of migratory species and the presence of non-natives may be a sign of the degradation of these environments, emphasizing the need for conservation measures in this area.
摘要/ Abstract摘要:目的评价弗朗西斯科河流域上游漫滩在近40年来是否仍然是洄游鱼类的栖息地，以及该地区鱼类区系的现状。方法采用刺网和拖网对7个常年生泻湖和6个临时泻湖及其直接支流进行取样。测量每个泻湖的温度、pH值和透明度。利用NMDS和ANOSIM对多年生和临时泻湖的鱼类组合进行了比较。结果共捕获物种40种，其中非本土物种4种，迁徙物种3种。虽然迁徙物种的丰度较低，但捕获的个体大多为幼鱼。多年生泻湖具有较高的物种丰富度。结论经过近40年的发展，上 o Francisco盆地的洪泛平原泻湖仍然对迁徙物种的招募具有重要意义，并且在上 o Francisco地区拥有相当大比例的鱼类区系。然而，迁徙物种的减少和非本地物种的存在可能是这些环境退化的迹象，强调需要在这一领域采取保护措施。
{"title":"Fish assemblage and current status of the upper São Francisco River basin floodplain","authors":"Marina Ferreira Moreira, Alexandre Peressin, João de Magalhães Lopes, Paulo Santos Pompeu","doi":"10.1590/s2179-975x0823","DOIUrl":"https://doi.org/10.1590/s2179-975x0823","url":null,"abstract":"Abstract: Aim This study aimed to evaluate whether the upper São Francisco River basin floodplain is still used as a nursery by migratory fish and present the current status of the area’s ichthyofauna after almost 40 years since the only survey was conducted in the region. Methods Sampling occurred in seven perennial lagoons and six temporaries from São Francisco River or its direct tributaries using gillnets and trawls. Temperature, pH, and transparency of each lagoon were measured. The estimated richness was calculated, and the fish assemblage from both perennial and temporary lagoons was compared using NMDS and ANOSIM. Results Forty species were captured, of which four were non-native and three were migratory. Although there was a low abundance of migratory species, most captured individuals were juveniles. Moreover, the perennial lagoons showed higher species richness. Conclusions After almost 40 years, the floodplain lagoons of the upper São Francisco basin remain important for the recruitment of migratory species and harbor an impressive proportion of fish fauna in the upper São Francisco area. However, the reduction of migratory species and the presence of non-natives may be a sign of the degradation of these environments, emphasizing the need for conservation measures in this area.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135316663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maiara Carolina Perussolo, Maiara Vicentini, Leonardo Skarbek Lyra, Lucicleide Ângelo Silva, Mayara dos Santos Rodrigues, Leticia da Silva Pereira Fernandes, Luis Fernando Fávaro, Helena Cristina Silva de Assis
Abstract: Aim Paracetamol (PCM), or acetaminophen, is one of the most used drugs for human treatment of pain and fever. Since it has often been found in the aquatic environment, the aim of this study was to investigate the effects of PCM on the reproductive axis of male Rhamdia quelen catfish. Methods Different biomarkers were evaluated in hypothalamus, liver and gonads, as well as the plasma sexual hormone quantification. The fish were exposed to three PCM concentrations: 0.25, 2.5 and 25 µg.L-1 and to a control group (solvent acetone 0.0003%). After 14 days of exposure, fish were anesthetized, for blood sampling and biometrics, and after euthanasia, the tissues were sampled. Plasma was used for 11- keto testosterone and 17β - estradiol quantification. The hypothalamus was collected for brain aromatase (cyp19a1b) gene expression; the liver for the vitellogenin (vtg) gene expression and biochemical biomarkers; and gonad for the biochemical and histological biomarkers analyses. Results No alterations were observed in the hormone’s levels, sexual maturation level or in cyp19a1b and vtg gene expression. In the liver the non-protein thiols concentration increased at 2.5 µg.L-1 of PCM, and the superoxide dismutase (SOD) activity was reduced at 0.25 µg.L-1 of PCM. In gonads, glutathione S-transferase (GST) activity decreased and SOD activity increased at 25 µg.L-1 of PCM, while the glutathione peroxidase (GPx) activity reduced after exposure to both PCM concentrations. Conclusion The results showed that environmental concentrations of PCM can cause alterations in the antioxidant system, mainly in the gonads of R. quelen males. However, without significant change in the hormones levels or in the expression of genes related to the reproduction axis. These alterations occurred at concentrations already found in aquatic environment, including in Brazil.
{"title":"A multibiomarker approach to investigate paracetamol effects in the reproduction regulatory axis of a male Neotropical catfish Rhamdia quelen","authors":"Maiara Carolina Perussolo, Maiara Vicentini, Leonardo Skarbek Lyra, Lucicleide Ângelo Silva, Mayara dos Santos Rodrigues, Leticia da Silva Pereira Fernandes, Luis Fernando Fávaro, Helena Cristina Silva de Assis","doi":"10.1590/s2179-975x3323","DOIUrl":"https://doi.org/10.1590/s2179-975x3323","url":null,"abstract":"Abstract: Aim Paracetamol (PCM), or acetaminophen, is one of the most used drugs for human treatment of pain and fever. Since it has often been found in the aquatic environment, the aim of this study was to investigate the effects of PCM on the reproductive axis of male Rhamdia quelen catfish. Methods Different biomarkers were evaluated in hypothalamus, liver and gonads, as well as the plasma sexual hormone quantification. The fish were exposed to three PCM concentrations: 0.25, 2.5 and 25 µg.L-1 and to a control group (solvent acetone 0.0003%). After 14 days of exposure, fish were anesthetized, for blood sampling and biometrics, and after euthanasia, the tissues were sampled. Plasma was used for 11- keto testosterone and 17β - estradiol quantification. The hypothalamus was collected for brain aromatase (cyp19a1b) gene expression; the liver for the vitellogenin (vtg) gene expression and biochemical biomarkers; and gonad for the biochemical and histological biomarkers analyses. Results No alterations were observed in the hormone’s levels, sexual maturation level or in cyp19a1b and vtg gene expression. In the liver the non-protein thiols concentration increased at 2.5 µg.L-1 of PCM, and the superoxide dismutase (SOD) activity was reduced at 0.25 µg.L-1 of PCM. In gonads, glutathione S-transferase (GST) activity decreased and SOD activity increased at 25 µg.L-1 of PCM, while the glutathione peroxidase (GPx) activity reduced after exposure to both PCM concentrations. Conclusion The results showed that environmental concentrations of PCM can cause alterations in the antioxidant system, mainly in the gonads of R. quelen males. However, without significant change in the hormones levels or in the expression of genes related to the reproduction axis. These alterations occurred at concentrations already found in aquatic environment, including in Brazil.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135317608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jorge Hernando Agudelo Morales, Camila Carneiro dos Santos Rodrigues, Mariana da Silva Messias, Flaviana Cardoso Damasceno, Angela Esmeralda Cely Torres, José Augusto Martins Corrêa
Abstract: Aim The Aurá River, located in the second-largest Brazilian Amazon city, has been experiencing the effects of human activities from riverine communities and the Aurá landfill for many years. In this study, we assess the occurrence, sources, and distribution of selected sterol markers in surface sediments of Aurá River in order to evaluate the organic matter inputs in this water body. Methods Gas chromatography-tandem mass spectrometry (GC/MS/MS) was used to identify and quantify sterol compounds. Pearson correlation, principal component analysis (PCA) and sterol ratios were used to assess sewage pollution. Results The sterol markers identified, the related diagnostic ratios, and statistical analysis showed that Aurá River sediments presented two primary sterol sources: anthropogenic (domestic sewage and inputs from Aurá landfill) and biogenic sources (terrestrial higher plants). Station 1 (the closest site to the Aurá landfill) presented the highest level of coprostanol (219.8 ng g-1). This maximum level of coprostanol and the sterol ratios indicate moderate human fecal contamination in the upper reach of the Aurá River. Coprostanol levels were similar to the lower to midrange concentrations reported for surficial river sediments around the world. Conclusions This study demonstrated that domestic sewage pollution from riverine communities and organic matter inputs from Aurá landfill might be assumed as potential threats to environmental and human health.
摘要:目的奥尔河位于巴西第二大亚马逊城市，多年来一直受到河流社区和奥尔填埋场的人类活动的影响。在这项研究中，我们评估了选定的甾醇标记物在奥耳河表层沉积物中的发生、来源和分布，以评估该水体的有机质输入。方法采用气相色谱-串联质谱法(GC/MS/MS)对甾醇类化合物进行鉴定和定量。采用Pearson相关、主成分分析(PCA)和甾醇比对污水污染进行评价。结果鉴定的甾醇标记物、相关诊断比值和统计分析表明，奥耳河沉积物的甾醇来源主要为人为来源(生活污水和奥耳填埋场投入物)和生物来源(陆生高等植物)。站1(离aur填埋场最近的站点)的coprostanol含量最高(219.8 ng g-1)。coprostanol的最高水平和甾醇的比例表明在aur河上游有中度的人类粪便污染。Coprostanol水平与世界各地报道的浅水河流沉积物的中低浓度相似。结论来自河流社区的生活污水污染和来自aur填埋场的有机物输入可能对环境和人类健康构成潜在威胁。
{"title":"Sedimentary sterol levels to track river contamination by sewage in one of the largest Amazonian cities (Belém - Pará), northern Brazil","authors":"Jorge Hernando Agudelo Morales, Camila Carneiro dos Santos Rodrigues, Mariana da Silva Messias, Flaviana Cardoso Damasceno, Angela Esmeralda Cely Torres, José Augusto Martins Corrêa","doi":"10.1590/s2179-975x3223","DOIUrl":"https://doi.org/10.1590/s2179-975x3223","url":null,"abstract":"Abstract: Aim The Aurá River, located in the second-largest Brazilian Amazon city, has been experiencing the effects of human activities from riverine communities and the Aurá landfill for many years. In this study, we assess the occurrence, sources, and distribution of selected sterol markers in surface sediments of Aurá River in order to evaluate the organic matter inputs in this water body. Methods Gas chromatography-tandem mass spectrometry (GC/MS/MS) was used to identify and quantify sterol compounds. Pearson correlation, principal component analysis (PCA) and sterol ratios were used to assess sewage pollution. Results The sterol markers identified, the related diagnostic ratios, and statistical analysis showed that Aurá River sediments presented two primary sterol sources: anthropogenic (domestic sewage and inputs from Aurá landfill) and biogenic sources (terrestrial higher plants). Station 1 (the closest site to the Aurá landfill) presented the highest level of coprostanol (219.8 ng g-1). This maximum level of coprostanol and the sterol ratios indicate moderate human fecal contamination in the upper reach of the Aurá River. Coprostanol levels were similar to the lower to midrange concentrations reported for surficial river sediments around the world. Conclusions This study demonstrated that domestic sewage pollution from riverine communities and organic matter inputs from Aurá landfill might be assumed as potential threats to environmental and human health.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135649373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tamiris Rosso Storck, Leticia Raquel Sippert, Débora Seben, Dinei Vitor Lazarotto, Júlia Helfenstein, Jheniffer dos Santos da Luz, Felipe Osmari Cerezer, Silvana Isabel Schneider, Arci Dirceu Wastowski, Barbara Clasen, Jaqueline Ineu Golombieski
Abstract Aim This study aimed to evaluate the interference of intensive fish farming in the physicochemical variables of water and in the zooplankton community from a tilapia (Oreochromis niloticus Linnaeus, 1758) pond in southern Brazil. In addition, it was verified whether the analyzed zooplankton groups could be bioindicators of changes in the quality of pond water. Methods The water and zooplankton sample collections were carried out monthly in different places of the pond: at the water supply site (affluent), in the middle of the pond and at the water outlet site (effluent). Analyzes related to nitrogen series (total nitrogen, total ammonia, nitrite + nitrate), dissolved oxygen, total hardness, total alkalinity, total phosphorus, pH, turbidity and water temperature were performed at all sampling sites. In addition, the density of the zooplankton groups Copepoda (adults and nauplii), Rotifera and Cladocera was determined. Results Regarding the changes between the quality variables of the affluent and effluent water of the pond, the outlet water showed a significant increase only in the variable total alkalinity. Rotifers were the most abundant organisms, and nauplii Copepoda showed a significant increase in the density of organisms in the middle of the pond compared to the inlet water. Both the redundancy analysis (RDA) and the Spearman correlation matrix revealed that zooplanktonic groups are associated with certain physicochemical variables of the water. According to the Analysis of Indicator Species (IndVal), the evaluated organisms are not related to bioindicator species in this environment. Conclusions Therefore, intensive production of O. niloticus caused changes only in the total alkalinity of the pond water. The zooplanktonic organisms correlated with the physicochemical variables of the water and between the groups, and did not show potential for bioindicators of water quality in the different locations of the pond.
{"title":"Intensive fish farming: changes in water quality and relationship with zooplankton community","authors":"Tamiris Rosso Storck, Leticia Raquel Sippert, Débora Seben, Dinei Vitor Lazarotto, Júlia Helfenstein, Jheniffer dos Santos da Luz, Felipe Osmari Cerezer, Silvana Isabel Schneider, Arci Dirceu Wastowski, Barbara Clasen, Jaqueline Ineu Golombieski","doi":"10.1590/s2179-975x7422","DOIUrl":"https://doi.org/10.1590/s2179-975x7422","url":null,"abstract":"Abstract Aim This study aimed to evaluate the interference of intensive fish farming in the physicochemical variables of water and in the zooplankton community from a tilapia (Oreochromis niloticus Linnaeus, 1758) pond in southern Brazil. In addition, it was verified whether the analyzed zooplankton groups could be bioindicators of changes in the quality of pond water. Methods The water and zooplankton sample collections were carried out monthly in different places of the pond: at the water supply site (affluent), in the middle of the pond and at the water outlet site (effluent). Analyzes related to nitrogen series (total nitrogen, total ammonia, nitrite + nitrate), dissolved oxygen, total hardness, total alkalinity, total phosphorus, pH, turbidity and water temperature were performed at all sampling sites. In addition, the density of the zooplankton groups Copepoda (adults and nauplii), Rotifera and Cladocera was determined. Results Regarding the changes between the quality variables of the affluent and effluent water of the pond, the outlet water showed a significant increase only in the variable total alkalinity. Rotifers were the most abundant organisms, and nauplii Copepoda showed a significant increase in the density of organisms in the middle of the pond compared to the inlet water. Both the redundancy analysis (RDA) and the Spearman correlation matrix revealed that zooplanktonic groups are associated with certain physicochemical variables of the water. According to the Analysis of Indicator Species (IndVal), the evaluated organisms are not related to bioindicator species in this environment. Conclusions Therefore, intensive production of O. niloticus caused changes only in the total alkalinity of the pond water. The zooplanktonic organisms correlated with the physicochemical variables of the water and between the groups, and did not show potential for bioindicators of water quality in the different locations of the pond.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135659438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jose Ricardo Baroldi Ciqueto Gargiulo, M. Pompêo, S. Cardoso-Silva, M. L. Petesse, Luciana Carvalho Bezerra de Menezes
Abstract Aim This research evaluated the water quality of the Taquacetuba Compartment, Billings Reservoir (Brazil), through analyzes of water quality data. The Taquacetuba Compartment has multiple uses such as public water supply and professional fishing activity and is of fundamental importance for the population of São Paulo State. Methods Sampling were conducted at the Compartment entrance (P1), close to the collecting point for public water supply transposition (P2), and in the mouths of the main tributaries (P3 - P6) forming the Compartment. Samplings were concentrated in the wet and dry periods of 2017. The physical and chemical variables measured were temperature, dissolved oxygen, pH, electrical conductivity, turbidity, chlorophyll α, ammonia nitrogen, nitrite, nitrate, total nitrogen, orthophosphate and total phosphorus. Results The Taquacetuba Compartment exhibited impaired water quality evidenced by high electrical conductivity, chlorophyll α and total phosphorus, above the legislation limits, classifying the sampling point as super or hyper eutrophic condition. The P1 sampling point presented the greatest environmental stress with worse water quality during the rainy season, while the other points (P2 - P6) showed an improvement during rainfalls. The P5 and P6, located at the tributaries mouth of the Monos and Curucutu River respectively, presented the best environmental conditions, evidenced by tendency to higher oxygen levels and lower turbidity in the rainy period. Conclusions From the observed result, we recognized two principal sources responsible for the impairment of the water quality in the Taquacetuba Compartment: i) the contribution from the central body of Billing Reservoir, related to the greater negative influence of the water pumping from the Pinheiros River with great organic load, especially in the wet period, and ii) the contribution from the tributaries, being that the Monos and Curucutu tributaries, as they are in an indigenous reserve area have better water quality. This study recognize the importance of land use and soil occupation around the tributaries and contribute with original data to support management measures for improving water quality in the Taquacetuba Compartment.
{"title":"Taquacetuba Compartment of Billings Reservoir (SP, Brazil): differential influence of the main water body and tributaries in the water quality","authors":"Jose Ricardo Baroldi Ciqueto Gargiulo, M. Pompêo, S. Cardoso-Silva, M. L. Petesse, Luciana Carvalho Bezerra de Menezes","doi":"10.1590/s2179-975x1221","DOIUrl":"https://doi.org/10.1590/s2179-975x1221","url":null,"abstract":"Abstract Aim This research evaluated the water quality of the Taquacetuba Compartment, Billings Reservoir (Brazil), through analyzes of water quality data. The Taquacetuba Compartment has multiple uses such as public water supply and professional fishing activity and is of fundamental importance for the population of São Paulo State. Methods Sampling were conducted at the Compartment entrance (P1), close to the collecting point for public water supply transposition (P2), and in the mouths of the main tributaries (P3 - P6) forming the Compartment. Samplings were concentrated in the wet and dry periods of 2017. The physical and chemical variables measured were temperature, dissolved oxygen, pH, electrical conductivity, turbidity, chlorophyll α, ammonia nitrogen, nitrite, nitrate, total nitrogen, orthophosphate and total phosphorus. Results The Taquacetuba Compartment exhibited impaired water quality evidenced by high electrical conductivity, chlorophyll α and total phosphorus, above the legislation limits, classifying the sampling point as super or hyper eutrophic condition. The P1 sampling point presented the greatest environmental stress with worse water quality during the rainy season, while the other points (P2 - P6) showed an improvement during rainfalls. The P5 and P6, located at the tributaries mouth of the Monos and Curucutu River respectively, presented the best environmental conditions, evidenced by tendency to higher oxygen levels and lower turbidity in the rainy period. Conclusions From the observed result, we recognized two principal sources responsible for the impairment of the water quality in the Taquacetuba Compartment: i) the contribution from the central body of Billing Reservoir, related to the greater negative influence of the water pumping from the Pinheiros River with great organic load, especially in the wet period, and ii) the contribution from the tributaries, being that the Monos and Curucutu tributaries, as they are in an indigenous reserve area have better water quality. This study recognize the importance of land use and soil occupation around the tributaries and contribute with original data to support management measures for improving water quality in the Taquacetuba Compartment.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67825017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Carvalho, Larissa Faria, N. Miiller, H. Spach, J. Vitule
Abstract Aim The objective was to describe the LWR of fish species of the Guaraguaçu River, as well as to compare the LWR parameters of the non-native species with the parameters obtained in their native ranges, available in the literature. Methods In this study, the LWR of 10 fish species of the Guaraguaçu River, southern Brazil, were analyzed. Fish were sampled semiannually between 2004 and 2007, using different sampling techniques in the Guaraguaçu River. Results A total of 673 specimens of 10 species were captured. The LWR demonstrated a prevalence of species (six out of 10) with positive allometric growth (b > 3). The remaining species presented isometric (b = 3, two species) or negative growth (b < 3, two species). Native species exhibited the same LWR from previous studies, except Centropomus parallelus, which presented an isometric growth in this study. The non-native species Clarias gariepinus and Ictalurus punctatus showed significant differences between the LWR parameters in the Guaraguaçu River and in their native distribution, but the same growth pattern. Oreochromis niloticus did not present significant differences in the allometric coefficient from its native range. Conclusions These results indicate that different environmental conditions may not influence the growth pattern of non-native species, which explains their invasion success due to high adaptability to new environments.
{"title":"Length-weight relationships of native and non-native fishes in a subtropical coastal river of the Atlantic Rain Forest","authors":"B. Carvalho, Larissa Faria, N. Miiller, H. Spach, J. Vitule","doi":"10.1590/s2179-975x2821","DOIUrl":"https://doi.org/10.1590/s2179-975x2821","url":null,"abstract":"Abstract Aim The objective was to describe the LWR of fish species of the Guaraguaçu River, as well as to compare the LWR parameters of the non-native species with the parameters obtained in their native ranges, available in the literature. Methods In this study, the LWR of 10 fish species of the Guaraguaçu River, southern Brazil, were analyzed. Fish were sampled semiannually between 2004 and 2007, using different sampling techniques in the Guaraguaçu River. Results A total of 673 specimens of 10 species were captured. The LWR demonstrated a prevalence of species (six out of 10) with positive allometric growth (b > 3). The remaining species presented isometric (b = 3, two species) or negative growth (b < 3, two species). Native species exhibited the same LWR from previous studies, except Centropomus parallelus, which presented an isometric growth in this study. The non-native species Clarias gariepinus and Ictalurus punctatus showed significant differences between the LWR parameters in the Guaraguaçu River and in their native distribution, but the same growth pattern. Oreochromis niloticus did not present significant differences in the allometric coefficient from its native range. Conclusions These results indicate that different environmental conditions may not influence the growth pattern of non-native species, which explains their invasion success due to high adaptability to new environments.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67856336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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