Pub Date : 2022-11-27DOI: 10.1080/23766808.2022.2148438
J. Costa, Emil José Hernández Ruz, Graciliano Galdino Alves Dos Santos
ABSTRACT Studies on the quantification and spatial distribution of stored carbon, as well as the potential for carbon uptake by forests, are of great importance. We assessed the spatial distribution and dynamic of carbon in forest plots in the Middle Xingu. These plots are part of the vegetation monitoring area of the Belo Monte Dam. We estimated the biomass of trees with diameter at breast height (DBH) ≥10 cm using an allometric equation with forest inventory data in the eastern Amazonian region in the Xingu River area. We evaluated the vegetation structure and carbon stock dynamic in 2012, 2014, and 2016, and temporal effects on carbon uptake. The periodic annual increase in carbon was significantly higher between 2012 and 2014 (2.5 Mg ha−1) than between 2014 and 2016 (1.84 Mg ha−1). Plant biomass was highly influenced by the abundance of species with low diameters (between 10 cm and 50 cm DBH). Despite the mortality rate being higher than the recruitment in the second period (2014–2016), we found that the forest did function as a carbon sink but showing increases in carbon emissions.
{"title":"Carbon stock and dynamic in the middle Xingu forests at eastern Amazonia","authors":"J. Costa, Emil José Hernández Ruz, Graciliano Galdino Alves Dos Santos","doi":"10.1080/23766808.2022.2148438","DOIUrl":"https://doi.org/10.1080/23766808.2022.2148438","url":null,"abstract":"ABSTRACT Studies on the quantification and spatial distribution of stored carbon, as well as the potential for carbon uptake by forests, are of great importance. We assessed the spatial distribution and dynamic of carbon in forest plots in the Middle Xingu. These plots are part of the vegetation monitoring area of the Belo Monte Dam. We estimated the biomass of trees with diameter at breast height (DBH) ≥10 cm using an allometric equation with forest inventory data in the eastern Amazonian region in the Xingu River area. We evaluated the vegetation structure and carbon stock dynamic in 2012, 2014, and 2016, and temporal effects on carbon uptake. The periodic annual increase in carbon was significantly higher between 2012 and 2014 (2.5 Mg ha−1) than between 2014 and 2016 (1.84 Mg ha−1). Plant biomass was highly influenced by the abundance of species with low diameters (between 10 cm and 50 cm DBH). Despite the mortality rate being higher than the recruitment in the second period (2014–2016), we found that the forest did function as a carbon sink but showing increases in carbon emissions.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42307181","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}
Pub Date : 2022-11-21DOI: 10.1080/23766808.2022.2148434
Juan I. Reppucci, S. de Bustos, Flavia Caruso, Rocio S. Fleitas Quintana, P. Perovic
ABSTRACT The white-lipped peccary (Tayassu pecari) is considered a key species for its role as an ecosystem engineer. Given their important ecological function, there is a great concern in the scientific community regarding the many reports of disappearances or great abundance reductions throughout its distribution (from southern Mexico to northern Argentina). Based on an extensive survey effort, we report new data of presence of WLP after a period of no detections in the Argentine Yungas. The study was conducted in the Yungas ecoregion, provinces of Jujuy and Salta, Argentina. Data was collected from camera trap, direct sightings and footprints during 2013–2021. From a total of 30,186 trap nights, we obtained 8 WLP detections. There were no detections before 2017, while as of 2018 there was at least one camera trap record in each of the years. Additionally, opportunistic records were obtained yearly from 2019 to 2021. The period without detections could be related to a period of a population cycle, as suggested in different regions of America during the last century, being disease the most likely cause. These cycles generally follow a pattern of a rapid population decline, a period of absence or low abundance followed by slow population growth. We believe that if the trend continues and the number of detections increases, we could be facing the early stages of the increase phase in the WLP population cycle in the Argentine Yungas. This type of report is important to document and contribute to a better understanding of the WLP population cycle process.
{"title":"Are white-lipped peccaries from Argentinean Yungas looking to a promising future?","authors":"Juan I. Reppucci, S. de Bustos, Flavia Caruso, Rocio S. Fleitas Quintana, P. Perovic","doi":"10.1080/23766808.2022.2148434","DOIUrl":"https://doi.org/10.1080/23766808.2022.2148434","url":null,"abstract":"ABSTRACT The white-lipped peccary (Tayassu pecari) is considered a key species for its role as an ecosystem engineer. Given their important ecological function, there is a great concern in the scientific community regarding the many reports of disappearances or great abundance reductions throughout its distribution (from southern Mexico to northern Argentina). Based on an extensive survey effort, we report new data of presence of WLP after a period of no detections in the Argentine Yungas. The study was conducted in the Yungas ecoregion, provinces of Jujuy and Salta, Argentina. Data was collected from camera trap, direct sightings and footprints during 2013–2021. From a total of 30,186 trap nights, we obtained 8 WLP detections. There were no detections before 2017, while as of 2018 there was at least one camera trap record in each of the years. Additionally, opportunistic records were obtained yearly from 2019 to 2021. The period without detections could be related to a period of a population cycle, as suggested in different regions of America during the last century, being disease the most likely cause. These cycles generally follow a pattern of a rapid population decline, a period of absence or low abundance followed by slow population growth. We believe that if the trend continues and the number of detections increases, we could be facing the early stages of the increase phase in the WLP population cycle in the Argentine Yungas. This type of report is important to document and contribute to a better understanding of the WLP population cycle process.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48341096","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}
Pub Date : 2022-11-11DOI: 10.1080/23766808.2022.2145089
Paula A. Gerstmayer, Virginia Monges, Adrián Jauregui, M. Colombo, L. Segura
ABSTRACT The European Starling (Sturnus vulgaris) is a cavity-nesting bird with great invasive potential. As a result of human intervention, this bird is now distributed across all continents (except Antarctica) and its distribution range is increasing at an alarming rate. The European Starling was introduced to Argentina in 1983 and is currently distributed across almost the entire country. It is considered one of the hundred most damaging invasive species in the world and constitutes a serious competitive threat to native cavity-nesting birds. Interactions between European Starlings and cavity-nesting birds generally have negative consequences on native bird populations, although there are still few reports in the literature that account for the degree of damage. In this study, we report for the first time details of the harassment strategy and subsequent cavity usurpation by European Starlings on a breeding pair of Green-barred Woodpeckers (Colaptes melanochloros) in an urban area of central-eastern Argentina. Over one breeding season, the woodpeckers excavated seven cavities, none of which were successful. In six of these reproductive attempts (86%) we recorded interactions with European Starlings and in five (71%) the cavity was usurped. On three occasions we recorded a cooperative harassment strategy by a group of European Starlings causing the woodpeckers to abandon the cavity. Our report is especially relevant if we consider the invasive potential of the European Starling worldwide and the frequently limited cavity supply in bird breeding habitats. Therefore, we encourage governmental authorities and environmental NGOs to take measures to control the populations of this aggressive invasive species.
{"title":"Cooperative harassment strategy by the European Starling to usurp cavities and reproductive cost for the neotropical Green-barred Woodpecker","authors":"Paula A. Gerstmayer, Virginia Monges, Adrián Jauregui, M. Colombo, L. Segura","doi":"10.1080/23766808.2022.2145089","DOIUrl":"https://doi.org/10.1080/23766808.2022.2145089","url":null,"abstract":"ABSTRACT The European Starling (Sturnus vulgaris) is a cavity-nesting bird with great invasive potential. As a result of human intervention, this bird is now distributed across all continents (except Antarctica) and its distribution range is increasing at an alarming rate. The European Starling was introduced to Argentina in 1983 and is currently distributed across almost the entire country. It is considered one of the hundred most damaging invasive species in the world and constitutes a serious competitive threat to native cavity-nesting birds. Interactions between European Starlings and cavity-nesting birds generally have negative consequences on native bird populations, although there are still few reports in the literature that account for the degree of damage. In this study, we report for the first time details of the harassment strategy and subsequent cavity usurpation by European Starlings on a breeding pair of Green-barred Woodpeckers (Colaptes melanochloros) in an urban area of central-eastern Argentina. Over one breeding season, the woodpeckers excavated seven cavities, none of which were successful. In six of these reproductive attempts (86%) we recorded interactions with European Starlings and in five (71%) the cavity was usurped. On three occasions we recorded a cooperative harassment strategy by a group of European Starlings causing the woodpeckers to abandon the cavity. Our report is especially relevant if we consider the invasive potential of the European Starling worldwide and the frequently limited cavity supply in bird breeding habitats. Therefore, we encourage governmental authorities and environmental NGOs to take measures to control the populations of this aggressive invasive species.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46288551","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}
Pub Date : 2022-10-18DOI: 10.1080/23766808.2022.2131311
Hb Macagno, Ax González-Reyes, Ja Corronca, Sm Rodríguez-Artigas, G. Flores
ABSTRACT In Northwest Argentina, nothing is known about the relationship of Araneae and Coleoptera with sugar cane crops. Using pitfall traps in three continuous native forest sites (N) and three native forest windbreaks surrounded by sugar cane crops (W) in the province of Salta, we assessed a)- whether the native diversity of epigeal Araneae and Coleoptera in the Chaco Serrano forest changes as a result of the fragmentation of the habitat caused by the sugar cane plots, and b)- whether the diversity of predatory species increases in native forest windbreaks as a consequence of the contribution of species that come from crops. In the spring of 2006 and the summer of 2007, we collected 599 Araneae and 555 Coleoptera, with community W (S = 132, N = 535) containing much more species but fewer individuals than community N (S = 111, N = 619). We found that the spatial and phenological patterns of the alpha and beta diversities of N were altered in W communities. Thus, habitat fragmentation generated by sugar cane plots led to the local extinction of native Araneae and Coleoptera species. The abundance of generalist Araneae and herbivorous Coleoptera increased in W habitats, but the coprophagous and detritivorous beetles decreased. The diversity of predatory species (Araneae and some Coleoptera) increased in W habitats, although their abundance declined relative to N habitats. Species turnover determined beta diversity between N and W sites; however, between the W sites, nestedness increased and spiders showed a greater loss of species. The spatial heterogeneity between sites, seasons, and habitats had a substantial effect on the composition of the Araneae and Coleoptera assemblages, hence influencing regional diversity. Eight species were habitat indicators, particularly Leprolochus birabeni (Zodariidae), which responds unfavourably to perturbations in the agricultural landscape, and could be deployed as environmental monitors in the Chaco Serrano.
{"title":"How do assemblages of epigeal Araneae and Coleoptera respond to changes in habitat structure caused by sugar cane crops in Northern Argentina?","authors":"Hb Macagno, Ax González-Reyes, Ja Corronca, Sm Rodríguez-Artigas, G. Flores","doi":"10.1080/23766808.2022.2131311","DOIUrl":"https://doi.org/10.1080/23766808.2022.2131311","url":null,"abstract":"ABSTRACT In Northwest Argentina, nothing is known about the relationship of Araneae and Coleoptera with sugar cane crops. Using pitfall traps in three continuous native forest sites (N) and three native forest windbreaks surrounded by sugar cane crops (W) in the province of Salta, we assessed a)- whether the native diversity of epigeal Araneae and Coleoptera in the Chaco Serrano forest changes as a result of the fragmentation of the habitat caused by the sugar cane plots, and b)- whether the diversity of predatory species increases in native forest windbreaks as a consequence of the contribution of species that come from crops. In the spring of 2006 and the summer of 2007, we collected 599 Araneae and 555 Coleoptera, with community W (S = 132, N = 535) containing much more species but fewer individuals than community N (S = 111, N = 619). We found that the spatial and phenological patterns of the alpha and beta diversities of N were altered in W communities. Thus, habitat fragmentation generated by sugar cane plots led to the local extinction of native Araneae and Coleoptera species. The abundance of generalist Araneae and herbivorous Coleoptera increased in W habitats, but the coprophagous and detritivorous beetles decreased. The diversity of predatory species (Araneae and some Coleoptera) increased in W habitats, although their abundance declined relative to N habitats. Species turnover determined beta diversity between N and W sites; however, between the W sites, nestedness increased and spiders showed a greater loss of species. The spatial heterogeneity between sites, seasons, and habitats had a substantial effect on the composition of the Araneae and Coleoptera assemblages, hence influencing regional diversity. Eight species were habitat indicators, particularly Leprolochus birabeni (Zodariidae), which responds unfavourably to perturbations in the agricultural landscape, and could be deployed as environmental monitors in the Chaco Serrano.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42301023","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}
Pub Date : 2022-10-12DOI: 10.1080/23766808.2022.2132023
A. Villarreal, Ricardo Zambrano-Cevallos, J. Brito, Santiago F. Burneo
ABSTRACT The movements and habitat use of three species of Sigmodontine rodents (Akodon mollis, Phyllotis haggard and Thomasomys paramorum) from the high Andes of Ecuador were evaluated using the spool-and-line technique in four transects. The floristic composition was analyzed at sampling sites to explain how these three species of Sigmodontine rodents use the vegetation as a habitat. Rodents were captured using live Sherman traps and equipped with a spool-and-line device. Each thread trail was traced, and their nests, feeders and shelters were recorded using GPS receivers. Also, the construction materials, nest morphology and shelters used during foraging, and the food resources were described. These three rodent species overlap in their distribution, but they present certain preferences for different habitats such as grasslands, open areas with cushions and shrubs, respectively. This study is an approach to the natural history of these Sigmodontine rodents in high mountain elevations.
{"title":"Movement and habitat use of three high Andean rodent species (Cricetidae: Sigmodontinae) in Andean páramos of Ecuador","authors":"A. Villarreal, Ricardo Zambrano-Cevallos, J. Brito, Santiago F. Burneo","doi":"10.1080/23766808.2022.2132023","DOIUrl":"https://doi.org/10.1080/23766808.2022.2132023","url":null,"abstract":"ABSTRACT The movements and habitat use of three species of Sigmodontine rodents (Akodon mollis, Phyllotis haggard and Thomasomys paramorum) from the high Andes of Ecuador were evaluated using the spool-and-line technique in four transects. The floristic composition was analyzed at sampling sites to explain how these three species of Sigmodontine rodents use the vegetation as a habitat. Rodents were captured using live Sherman traps and equipped with a spool-and-line device. Each thread trail was traced, and their nests, feeders and shelters were recorded using GPS receivers. Also, the construction materials, nest morphology and shelters used during foraging, and the food resources were described. These three rodent species overlap in their distribution, but they present certain preferences for different habitats such as grasslands, open areas with cushions and shrubs, respectively. This study is an approach to the natural history of these Sigmodontine rodents in high mountain elevations.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49423537","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}
Pub Date : 2022-10-08DOI: 10.1080/23766808.2022.2123729
Leonardo Ordóñez-Delgado, Freddy Ramon Castillo, Angel Pineda Díaz
Laboratorio de Ecología Tropical y Servicios Ecosistémicos – EcoSS Lab, Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja, Loja, Ecuador; Museo de Zoología, Universidad Técnica Particular de Loja, Loja, Ecuador; Gobierno Autónomo Descentralizado Parroquial de Valladolid, Ecuador; Ministerio del Ambiente Agua y Transición Ecológica, Administración Reserva Biológica Cerro Plateado, Ecuador
{"title":"Primer registro del polluelo y nuevos datos del nido del Autillo Rojizo (Megascops ingens) (Strigiformes: Strigidae) en Zamora Chinchipe, sureste de Ecuador","authors":"Leonardo Ordóñez-Delgado, Freddy Ramon Castillo, Angel Pineda Díaz","doi":"10.1080/23766808.2022.2123729","DOIUrl":"https://doi.org/10.1080/23766808.2022.2123729","url":null,"abstract":"Laboratorio de Ecología Tropical y Servicios Ecosistémicos – EcoSS Lab, Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja, Loja, Ecuador; Museo de Zoología, Universidad Técnica Particular de Loja, Loja, Ecuador; Gobierno Autónomo Descentralizado Parroquial de Valladolid, Ecuador; Ministerio del Ambiente Agua y Transición Ecológica, Administración Reserva Biológica Cerro Plateado, Ecuador","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47385039","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}
Pub Date : 2022-10-08DOI: 10.1080/23766808.2022.2123731
J. C. Sánchez-Nivicela, Eduardo Toral-Contreras, Verónica L. Urgiles
RESUMEN En este estudio, basándonos en evidencias morfológicas y moleculares, describimos una nueva especie del género Pristimantis que habita en las montañas y valles áridos de la provincia del Azuay, incluyendo zonas urbanas y periurbanas de la ciudad de Cuenca. La nueva especie se destaca por presentar una textura dermal externa fuertemente granulada, una papilla proyectada en la punta del hocico y un canto de advertencia que consiste en series combinadas de tres y dos notas, Morfológicamente, la nueva especie es similar con P. cajamarcensis, P. ceuthospilus, P. jimenezi, P. lojanus, P. phoxocephalus y P torresi, por presentar una quilla en la punta del hocico, sin embargo, su textura dermal fuertemente granular, ausencia de tubérculos, y su coloración rosácea con reticulaciones irregulares oscuras y una características barra interorbital blanca, la distinguen de estas especies. Con P. cajamarcensis, P. ceuthopilus y otras dos especies con incertidumbre taxonómica, forma un clado distribuido en el sur de Ecuador y norte de Perú. Nuestros resultados resaltan la importancia de aumentar estudios taxonómicos a fin de documentar eficazmente la biodiversidad en la región andina, así como, la importancia de desarrollar planes de monitoreo y conservación que incluyan a especies que habitan en áreas urbanas y semiurbanas.
最后，我们提出了一种假设，即在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上，在一个国家的领土上。提出一个新的物种指出了构dermal外部强烈之处,一个困境是在鼻子和尖的计划获得联合警告即在系列3年和2,形态学笔记,新的物种是类似cajamarcensis疟原虫、ceuthospilus、jimenezi、P lojanus phoxocephalus P torresi提出一个龙骨,吻尖,然而,其质感dermal抓住粒、块茎作物,它的粉红色，不规则的深色网状结构和典型的白色眶间条，将它与这些物种区分开来。与P. cajamarcensis、P. ceuthopilus和其他两个分类学上不确定的物种一起，它形成了一个分布在厄瓜多尔南部和秘鲁北部的分支。我们的研究结果强调了加强分类学研究的重要性，以有效地记录安第斯地区的生物多样性，以及制定监测和保护计划的重要性，包括生活在城市和半城市地区的物种。
{"title":"Una nueva especie de Pristimantis (Anura: Strabomantidae) de la provincia del Azuay, Andes sur de Ecuador","authors":"J. C. Sánchez-Nivicela, Eduardo Toral-Contreras, Verónica L. Urgiles","doi":"10.1080/23766808.2022.2123731","DOIUrl":"https://doi.org/10.1080/23766808.2022.2123731","url":null,"abstract":"RESUMEN En este estudio, basándonos en evidencias morfológicas y moleculares, describimos una nueva especie del género Pristimantis que habita en las montañas y valles áridos de la provincia del Azuay, incluyendo zonas urbanas y periurbanas de la ciudad de Cuenca. La nueva especie se destaca por presentar una textura dermal externa fuertemente granulada, una papilla proyectada en la punta del hocico y un canto de advertencia que consiste en series combinadas de tres y dos notas, Morfológicamente, la nueva especie es similar con P. cajamarcensis, P. ceuthospilus, P. jimenezi, P. lojanus, P. phoxocephalus y P torresi, por presentar una quilla en la punta del hocico, sin embargo, su textura dermal fuertemente granular, ausencia de tubérculos, y su coloración rosácea con reticulaciones irregulares oscuras y una características barra interorbital blanca, la distinguen de estas especies. Con P. cajamarcensis, P. ceuthopilus y otras dos especies con incertidumbre taxonómica, forma un clado distribuido en el sur de Ecuador y norte de Perú. Nuestros resultados resaltan la importancia de aumentar estudios taxonómicos a fin de documentar eficazmente la biodiversidad en la región andina, así como, la importancia de desarrollar planes de monitoreo y conservación que incluyan a especies que habitan en áreas urbanas y semiurbanas.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44746241","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}
Pub Date : 2022-09-21DOI: 10.1080/23766808.2022.2126020
Vinicius B. Pessoa, G. J. Moura, A. Lira
ABSTRACT The presence of a predator can cause behavioral changes in its prey, such as decreased foraging activity. Previous studies have indicated that the scorpion Ananteris mauryi has the ability to identify the chemical traces of its intraguild predator Tityus pusillus, causing it to reduce its exploratory activity. In this study, the foraging activities of A. mauryi in a natural environment with different densities of T. pusillus were compared. The study was carried out through active searches from 19:00 to 22:00 in five fragments of the Atlantic Forest in Pernambuco, Brazil, one having a low density of T. pusillus and four returning high densities. In total, 81 individuals of A. mauryi were observed, and 49.4% were recorded in the area with a low density of T. pusillus. In general, A. mauryi individuals exhibited a similar foraging activity in the fragment with low and higher density of T. pusillus. Similarly, A. mauryi was found on leaf litter bottom layers independently of T. pusillus density. Therefore, our results suggest that their predator density does not exert any influence on foraging activity and microhabitat choice in A. mauryi.
{"title":"Influence of predator density in foraging behavior and microhabitat choice on litter-dwelling scorpions","authors":"Vinicius B. Pessoa, G. J. Moura, A. Lira","doi":"10.1080/23766808.2022.2126020","DOIUrl":"https://doi.org/10.1080/23766808.2022.2126020","url":null,"abstract":"ABSTRACT The presence of a predator can cause behavioral changes in its prey, such as decreased foraging activity. Previous studies have indicated that the scorpion Ananteris mauryi has the ability to identify the chemical traces of its intraguild predator Tityus pusillus, causing it to reduce its exploratory activity. In this study, the foraging activities of A. mauryi in a natural environment with different densities of T. pusillus were compared. The study was carried out through active searches from 19:00 to 22:00 in five fragments of the Atlantic Forest in Pernambuco, Brazil, one having a low density of T. pusillus and four returning high densities. In total, 81 individuals of A. mauryi were observed, and 49.4% were recorded in the area with a low density of T. pusillus. In general, A. mauryi individuals exhibited a similar foraging activity in the fragment with low and higher density of T. pusillus. Similarly, A. mauryi was found on leaf litter bottom layers independently of T. pusillus density. Therefore, our results suggest that their predator density does not exert any influence on foraging activity and microhabitat choice in A. mauryi.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46079769","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}
Pub Date : 2022-07-28DOI: 10.1080/23766808.2022.2104971
Daniel Restrepo Santamaria, Daniel Valencia-Rodríguez, J. Herrera-Pérez, Sebastián Muñoz-Duque, Andrés Felipe Galeano, L. Jiménez-Segura
ABSTRACT The habitat fragmentation caused by reservoir construction in different aquatic systems in the Magdalena River basin is a latent threat to the diversity of fishes and aquatic environments in the Andean region of Colombia. Contributing to the knowledge about how fish assemblages are formed in these scenarios is fundamental for the management and decision-making on the aquatic resources of the basin. In this communication, we describe the results of a fish characterization in the area of influence of the Piedras Blancas reservoir, a high Andean reservoir built for hydroelectric power generation. Only three species of fish that make up the evaluated assemblage were captured, and two of them, Cyprinus carpio and Xiphophorus maculatus, are not native to the basin. Possibly, with a greater sampling effort, more species can be found. The native species Hemibrycon sp. is distributed mainly in a creek, while in the reservoir, the introduced species dominate. The environmental variables were in optimal ranges for the development of life in the evaluated environments. It is important to advance the knowledge about the distribution of the introduced and native species in the basin to generate recommendations that contribute to the management of these species in the aquatic systems of Colombian Andes.
{"title":"Contribution to the knowledge of non-native fishes in reservoirs in the Magdalena River basin: the study case Piedras blancas reservoir","authors":"Daniel Restrepo Santamaria, Daniel Valencia-Rodríguez, J. Herrera-Pérez, Sebastián Muñoz-Duque, Andrés Felipe Galeano, L. Jiménez-Segura","doi":"10.1080/23766808.2022.2104971","DOIUrl":"https://doi.org/10.1080/23766808.2022.2104971","url":null,"abstract":"ABSTRACT The habitat fragmentation caused by reservoir construction in different aquatic systems in the Magdalena River basin is a latent threat to the diversity of fishes and aquatic environments in the Andean region of Colombia. Contributing to the knowledge about how fish assemblages are formed in these scenarios is fundamental for the management and decision-making on the aquatic resources of the basin. In this communication, we describe the results of a fish characterization in the area of influence of the Piedras Blancas reservoir, a high Andean reservoir built for hydroelectric power generation. Only three species of fish that make up the evaluated assemblage were captured, and two of them, Cyprinus carpio and Xiphophorus maculatus, are not native to the basin. Possibly, with a greater sampling effort, more species can be found. The native species Hemibrycon sp. is distributed mainly in a creek, while in the reservoir, the introduced species dominate. The environmental variables were in optimal ranges for the development of life in the evaluated environments. It is important to advance the knowledge about the distribution of the introduced and native species in the basin to generate recommendations that contribute to the management of these species in the aquatic systems of Colombian Andes.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45739303","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}
Pub Date : 2022-07-14DOI: 10.1080/23766808.2022.2096533
M. J. Anzueto-Calvo, E. Velázquez-Velázquez, G. Ruiz-Campos, Brenda G. Cruz Maza, Sara E. Domínguez-Cisneros
ABSTRACT Tlaloc hildebrandi is a small (<130 mm) freshwater fish endemic to Southwest Mexico and is listed as endangered through habitat loss and invasive species. We determine and compare the parameters of the length–weight relationship, relative weight, and condition factor among different populations of the endemic killifish, T. hildebrandi. Fulton’s condition factor (K), relative weight (Wr), and the length–weight relationship were estimated for three killifish populations throughout its distribution range in the highlands of Chiapas, México. The Wr was significantly lowest in fishes where there are higher anthropogenic activities. The somatic indexes and the length–weight relationships for T. hildebrandi are hereby published for the first time in both the scientific literature and databases, such as Fishbase.
{"title":"Evaluation of somatic indexes in the endangered and endemic killifish Tlaloc hildebrandi (Cyprinodontiformes: profundulidae)","authors":"M. J. Anzueto-Calvo, E. Velázquez-Velázquez, G. Ruiz-Campos, Brenda G. Cruz Maza, Sara E. Domínguez-Cisneros","doi":"10.1080/23766808.2022.2096533","DOIUrl":"https://doi.org/10.1080/23766808.2022.2096533","url":null,"abstract":"ABSTRACT Tlaloc hildebrandi is a small (<130 mm) freshwater fish endemic to Southwest Mexico and is listed as endangered through habitat loss and invasive species. We determine and compare the parameters of the length–weight relationship, relative weight, and condition factor among different populations of the endemic killifish, T. hildebrandi. Fulton’s condition factor (K), relative weight (Wr), and the length–weight relationship were estimated for three killifish populations throughout its distribution range in the highlands of Chiapas, México. The Wr was significantly lowest in fishes where there are higher anthropogenic activities. The somatic indexes and the length–weight relationships for T. hildebrandi are hereby published for the first time in both the scientific literature and databases, such as Fishbase.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41408634","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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