Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2938
R. Aquino-Souza, J.G.F. Gomes-Filho
The sea cucumber Holothuria (Halodeima) grisea Selenka, 1867 is distributed from Florida (USA) to southern Brazil. Juveniles of this species are very hardly found in the wild. H. (H.) grisea is very common on sandstone reefs in some localities from the northern coast of Brazil. Because seagrass beds are a conspicuous feature in some of these localities, the authors have speculated that juveniles live in these habitats. Following this species' reproduction period, seagrass beds adjacent to sandstone reefs were inspected in search of juveniles from December to May. Sea cucumbers were found in one of them. Individuals were collected from two areas within the seagrass bed and two areas within neighboring rocky shores, and their contracted body lengths were measured. Mean sizes were significantly smaller in the seagrass areas than in reef areas (post-hoc Tuckey test, P < 0.05). Within the seagrass bed, more than 70% of individuals were smaller than 7.5 cm, whereas 84.9 and 93.3% in the two reef areas were larger than 7.5 cm -the first report of an H. (H.) grisea population dominated by juveniles. Therefore, seagrass meadows should be looked at as possible sources of juveniles for adult populations of H. (H.) grisea in the tropical western Atlantic. Also, given the rarity of juvenile sightings for this species anywhere within its distribution range, the results are very meaningful for future research on its ecology and local and regional fishery management.
{"title":"Where are the juveniles of the gray sea cucumber Holothuria (Halodeima) grisea?","authors":"R. Aquino-Souza, J.G.F. Gomes-Filho","doi":"10.3856/vol51-issue2-fulltext-2938","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2938","url":null,"abstract":"The sea cucumber Holothuria (Halodeima) grisea Selenka, 1867 is distributed from Florida (USA) to southern Brazil. Juveniles of this species are very hardly found in the wild. H. (H.) grisea is very common on sandstone reefs in some localities from the northern coast of Brazil. Because seagrass beds are a conspicuous feature in some of these localities, the authors have speculated that juveniles live in these habitats. Following this species' reproduction period, seagrass beds adjacent to sandstone reefs were inspected in search of juveniles from December to May. Sea cucumbers were found in one of them. Individuals were collected from two areas within the seagrass bed and two areas within neighboring rocky shores, and their contracted body lengths were measured. Mean sizes were significantly smaller in the seagrass areas than in reef areas (post-hoc Tuckey test, P < 0.05). Within the seagrass bed, more than 70% of individuals were smaller than 7.5 cm, whereas 84.9 and 93.3% in the two reef areas were larger than 7.5 cm -the first report of an H. (H.) grisea population dominated by juveniles. Therefore, seagrass meadows should be looked at as possible sources of juveniles for adult populations of H. (H.) grisea in the tropical western Atlantic. Also, given the rarity of juvenile sightings for this species anywhere within its distribution range, the results are very meaningful for future research on its ecology and local and regional fishery management.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45238644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2980
R. Peña, I. Moguel-Hernández, N. García-Aguilar
The free amino acids (FAAs) profile and its variations during the embryonic development and yolk-sac larvae of Pacific red snapper Lutjanus peru are described. The concentration of 15 FAAs (nine essentials and six non-essentials) was evaluated by reverse-phase high-performance liquid chromatography. The fertilized eggs of L. peru contain a small concentration of FAAs (4.77 ± 0.89 nmol ind-1). However, the variations in the FAAs pool during the early development are similar to the changes reported in other species with small pelagic eggs. The essential free amino acids are more abundant than the non-essential free amino acids throughout the studied period. During the egg stage, an increase in the FAAs was observed, and after hatching, isoleucine, leucine, lysine, and alanine were the FAAs that decreased the most during the yolk-sac larvae stage. The hatching rate was correlated with the total FAAs, the fraction of essential free amino acids, and the concentrations of glutamic acid, threonine, and valine in the egg stage, suggesting a possible role as a determinant in egg quality. Further studies are required to assess the role of FAAs in other aspects of egg development, like fertilization rate and egg buoyancy.
{"title":"Variations in the concentration of free amino acids during the early development of the Pacific red snapper Lutjanus peru","authors":"R. Peña, I. Moguel-Hernández, N. García-Aguilar","doi":"10.3856/vol51-issue2-fulltext-2980","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2980","url":null,"abstract":"The free amino acids (FAAs) profile and its variations during the embryonic development and yolk-sac larvae of Pacific red snapper Lutjanus peru are described. The concentration of 15 FAAs (nine essentials and six non-essentials) was evaluated by reverse-phase high-performance liquid chromatography. The fertilized eggs of L. peru contain a small concentration of FAAs (4.77 ± 0.89 nmol ind-1). However, the variations in the FAAs pool during the early development are similar to the changes reported in other species with small pelagic eggs. The essential free amino acids are more abundant than the non-essential free amino acids throughout the studied period. During the egg stage, an increase in the FAAs was observed, and after hatching, isoleucine, leucine, lysine, and alanine were the FAAs that decreased the most during the yolk-sac larvae stage. The hatching rate was correlated with the total FAAs, the fraction of essential free amino acids, and the concentrations of glutamic acid, threonine, and valine in the egg stage, suggesting a possible role as a determinant in egg quality. Further studies are required to assess the role of FAAs in other aspects of egg development, like fertilization rate and egg buoyancy.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44133333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2926
Laura L. López-Galindo, Ernesto Larios‐Soriano, Claudia Ventura-López, F. Díaz, D. Re, C. Galindo-Sánchez
This study investigated the effect of acclimation temperatures and eyestalk ablation (EA) on the thermal tolerance of juvenile Penaeus vannamei. In each case, the relative expression of genes involved in cell protection (hsp70 and hsp90), oxidative stress (cMnSOD and GPx), and anaerobic metabolism (hif1a) was assessed. For this purpose, shrimp were acclimated to 20, 26, and 32°C for 21 days. After acclimation, the critical thermal maxima (CTmax) was determined in non-eyestalk ablated, unilaterally, and bilaterally eyestalk ablated organisms. An effect of acclimation temperatures on CTmax values was observed, with shrimp acclimated at 32°C having the highest rates. Likewise, EA resulted in lower thermal tolerance to CTmax in organisms acclimated at 20 and 26°C. The shrimp's protective and cellular repair responses were evidenced by increased hsp70 and hsp90 gene expression after CTmax and were intensified by the EA. In contrast, the results showed that cMnSOD was very sensitive to CTmax, and its expression was intensified with EA, while for GPx, there was an increase in the relative gene expression, mainly in shrimp acclimated at 20°C. In the case of hif1a, overexpression was observed at the acclimation temperature of 26°C, showing the activation of compensatory mechanisms such as anaerobic metabolism. EA caused a significant molecular response during CTmax of molecular biomarkers involved in heat stress response, oxidative stress, and compensatory mechanisms.
{"title":"Eyestalk ablation and acclimation temperatures affect juveniles Penaeus vannamei thermo-tolerance: molecular biomarkers of cell protection oxidative stress, and compensatory mechanisms","authors":"Laura L. López-Galindo, Ernesto Larios‐Soriano, Claudia Ventura-López, F. Díaz, D. Re, C. Galindo-Sánchez","doi":"10.3856/vol51-issue2-fulltext-2926","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2926","url":null,"abstract":"This study investigated the effect of acclimation temperatures and eyestalk ablation (EA) on the thermal tolerance of juvenile Penaeus vannamei. In each case, the relative expression of genes involved in cell protection (hsp70 and hsp90), oxidative stress (cMnSOD and GPx), and anaerobic metabolism (hif1a) was assessed. For this purpose, shrimp were acclimated to 20, 26, and 32°C for 21 days. After acclimation, the critical thermal maxima (CTmax) was determined in non-eyestalk ablated, unilaterally, and bilaterally eyestalk ablated organisms. An effect of acclimation temperatures on CTmax values was observed, with shrimp acclimated at 32°C having the highest rates. Likewise, EA resulted in lower thermal tolerance to CTmax in organisms acclimated at 20 and 26°C. The shrimp's protective and cellular repair responses were evidenced by increased hsp70 and hsp90 gene expression after CTmax and were intensified by the EA. In contrast, the results showed that cMnSOD was very sensitive to CTmax, and its expression was intensified with EA, while for GPx, there was an increase in the relative gene expression, mainly in shrimp acclimated at 20°C. In the case of hif1a, overexpression was observed at the acclimation temperature of 26°C, showing the activation of compensatory mechanisms such as anaerobic metabolism. EA caused a significant molecular response during CTmax of molecular biomarkers involved in heat stress response, oxidative stress, and compensatory mechanisms.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48896572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2999
J. C. R. Dorantes‐de‐la‐O, A. Maeda-Martínez
Backyard aquaculture is gaining importance as a source of food and economic input for rural families in Mexico. The profitability of this system needs to be determined. Bioeconomic tools allow for making profit projections of any production system. A bioeconomic model composed of biological, production, and economic sub-models was developed to evaluate a low-cost backyard aquaculture system (BAS) appropriate for rural communities, considering theoretical productive parameters at certain environmental conditions. The BAS consisted of a 2800 L water reservoir stocked with 168 masculinized 1 g fingerlings of tilapia (Oreochromis niloticus) at 60 ind m-3 density and aerated with two ventury-type submerged pumps of 0.046 hp at a rate of 1400 L h-1 each. Two culture cycles of 25 weeks each were analysed. The initial investment was USD 1200 (USD 775 equipment + USD 425 operation cost yr-1). Results from the model indicate the production of 303 fishes of 614 g, equivalent to 186 kg yr-1, considering 10% mortality. Selling at USD 3.62 kg-1, net profits varied from USD 184 to 16 at 0 and 25% self-consumption. The payback period was three and four years at 0 and 10% self-consumption but was longer than five years at 25%. A response surface plot of profitability indicators (cost-benefit, net present value, and internal rate of return) was constructed at different self-consumption percentages, sale prices, and temperatures. In conclusion, BAS is a viable self-sustainable alternative for tilapia production at a low scale in rural areas of Mexico and other Latin American countries.
后院水产养殖作为墨西哥农村家庭的食物和经济投入来源，越来越重要。该系统的盈利能力有待确定。生物经济工具允许对任何生产系统进行利润预测。考虑到某些环境条件下的理论生产参数，开发了一个由生物、生产和经济子模型组成的生物经济模型，以评估适合农村社区的低成本后院水产养殖系统（BAS）。BAS由一个2800升的蓄水池组成，蓄水池中储存着168只雄性化的1克罗非鱼（Oreochromis niloticus）鱼种，密度为60 ind m-3，并用两台0.046马力的冒险型潜水泵充气，每台泵的流量为1400升h-1。分析了两个培养周期，每个周期25周。初始投资为1200美元（775美元的设备+425美元的运营成本，每年1次）。该模型的结果表明，考虑到10%的死亡率，303条鱼的产量为614克，相当于186公斤yr-1。以3.62美元kg-1的价格出售，净利润从184美元到16美元不等，分别为0和25%的自我消费。在0和10%的自耗情况下，回收期分别为三年和四年，但在25%的情况下，超过了五年。在不同的自我消费百分比、销售价格和温度下，构建了盈利指标（成本效益、净现值和内部回报率）的响应面图。总之，BAS是墨西哥和其他拉丁美洲国家农村地区低规模生产罗非鱼的一种可行的自我可持续的替代品。
{"title":"Bioeconomic model for the evaluation of a backyard aquaculture system for tilapia (Oreochromis niloticus)","authors":"J. C. R. Dorantes‐de‐la‐O, A. Maeda-Martínez","doi":"10.3856/vol51-issue2-fulltext-2999","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2999","url":null,"abstract":"Backyard aquaculture is gaining importance as a source of food and economic input for rural families in Mexico. The profitability of this system needs to be determined. Bioeconomic tools allow for making profit projections of any production system. A bioeconomic model composed of biological, production, and economic sub-models was developed to evaluate a low-cost backyard aquaculture system (BAS) appropriate for rural communities, considering theoretical productive parameters at certain environmental conditions. The BAS consisted of a 2800 L water reservoir stocked with 168 masculinized 1 g fingerlings of tilapia (Oreochromis niloticus) at 60 ind m-3 density and aerated with two ventury-type submerged pumps of 0.046 hp at a rate of 1400 L h-1 each. Two culture cycles of 25 weeks each were analysed. The initial investment was USD 1200 (USD 775 equipment + USD 425 operation cost yr-1). Results from the model indicate the production of 303 fishes of 614 g, equivalent to 186 kg yr-1, considering 10% mortality. Selling at USD 3.62 kg-1, net profits varied from USD 184 to 16 at 0 and 25% self-consumption. The payback period was three and four years at 0 and 10% self-consumption but was longer than five years at 25%. A response surface plot of profitability indicators (cost-benefit, net present value, and internal rate of return) was constructed at different self-consumption percentages, sale prices, and temperatures. In conclusion, BAS is a viable self-sustainable alternative for tilapia production at a low scale in rural areas of Mexico and other Latin American countries.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43152884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2967
Verónica Balderas-González, Elizabeth Ponce‐Rivas, F. Díaz, Laura Camacho‐Jiménez, Edna Sánchez-Castrejón, M. Aguilar
The crustacean hyperglycemic hormone (CHH) is a multifunctional neuropeptide that plays a central role in crustacean metabolism and physiology. Experiments were conducted to examine the metabolic and osmoionic capabilities of the white shrimp Penaeus vannamei injected with its recombinant CHH-A (rCHH-A) peptide and acutely transferred from iso- (26 ppt) to hypo- (10 ppt) and hyper-osmotic (40 ppt) conditions. Hemolymph glucose, protein, osmoregulatory capacity (OC), and ionoregulatory capacity (IC) for sodium, chloride, potassium, and calcium were evaluated at four post-injection times (0.5, 1, 2, and 24 h). The rCHH-A peptide had hyperglycemic activity in all salinity conditions, obtaining maximum values at 1 h post-injection. However, in shrimp transferred to hyper-osmotic condition, rCHH-A caused the most significant reductions in OC (2 h), chloride IC (2 h), and total proteins (0.5-2 h) compared to the phosphate-buffered saline (PBS) control. Contrastingly, in shrimp transferred to hypo-osmotic conditions, rCHH-A decreased OC significantly from 2-24 h, strongly decreased chloride and potassium IC at 1 h post-injection, and increased total protein concentration in the hemolymph (1-2 h) when compared to PBS control. Concerning calcium, the rCHH-A injection decreased calcium IC at 10 ppt (1 h) and 26 ppt (2 h), providing insight into a potential role for CHH-A in calcium regulation. The results suggest that glucose and protein mobilization could enhance energy for osmo-ionic regulation under extreme osmotic conditions. This research study contributed to understanding crustacean endocrinology in P. vannamei and related euryhaline crustaceans. Further research should be performed to understand the osmo- and ionoregulatory mechanisms of the different CHH variants in crustaceans exposed to other stress conditions and the relationship with intermediary energy metabolism regulation.
{"title":"Metabolic and osmoionic effects of the recombinant crustacean hyperglycemic hormone (rCHH-A) of the Pacific white shrimp Penaeus vannamei on specimens acutely exposed to extreme salinities","authors":"Verónica Balderas-González, Elizabeth Ponce‐Rivas, F. Díaz, Laura Camacho‐Jiménez, Edna Sánchez-Castrejón, M. Aguilar","doi":"10.3856/vol51-issue2-fulltext-2967","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2967","url":null,"abstract":"The crustacean hyperglycemic hormone (CHH) is a multifunctional neuropeptide that plays a central role in crustacean metabolism and physiology. Experiments were conducted to examine the metabolic and osmoionic capabilities of the white shrimp Penaeus vannamei injected with its recombinant CHH-A (rCHH-A) peptide and acutely transferred from iso- (26 ppt) to hypo- (10 ppt) and hyper-osmotic (40 ppt) conditions. Hemolymph glucose, protein, osmoregulatory capacity (OC), and ionoregulatory capacity (IC) for sodium, chloride, potassium, and calcium were evaluated at four post-injection times (0.5, 1, 2, and 24 h). The rCHH-A peptide had hyperglycemic activity in all salinity conditions, obtaining maximum values at 1 h post-injection. However, in shrimp transferred to hyper-osmotic condition, rCHH-A caused the most significant reductions in OC (2 h), chloride IC (2 h), and total proteins (0.5-2 h) compared to the phosphate-buffered saline (PBS) control. Contrastingly, in shrimp transferred to hypo-osmotic conditions, rCHH-A decreased OC significantly from 2-24 h, strongly decreased chloride and potassium IC at 1 h post-injection, and increased total protein concentration in the hemolymph (1-2 h) when compared to PBS control. Concerning calcium, the rCHH-A injection decreased calcium IC at 10 ppt (1 h) and 26 ppt (2 h), providing insight into a potential role for CHH-A in calcium regulation. The results suggest that glucose and protein mobilization could enhance energy for osmo-ionic regulation under extreme osmotic conditions. This research study contributed to understanding crustacean endocrinology in P. vannamei and related euryhaline crustaceans. Further research should be performed to understand the osmo- and ionoregulatory mechanisms of the different CHH variants in crustaceans exposed to other stress conditions and the relationship with intermediary energy metabolism regulation.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45841739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2981
Darlan Roque Dapieve, M. Maggi, E. Mercante, Humberto Rodrigues Francisco, Daiane De Deus Oliveira, Olavo José Luiz Junior
Remote sensing (RS) and geographic information systems (GIS) have been used to guide the selection of suitable areas for aquaculture. This systematic review synthesizes the key suitability factors and constraints reported in the literature for establishing inland pond aquaculture. We searched for primary studies on Scopus and Web of Science according to preferred reporting items for systemic reviews and meta-analysis (PRISMA) guidelines. Between 1991 and 2020, 354 articles were published in 104 academic journals. The maximum annual number of publications occurred in 2020, with 22 publications, and there is an increasing trend in studies published over the past 30 years. From 12 selected studies, we identified 48 suitability factors, 11 related to soil suitability, 19 to socioeconomic and infrastructure suitability, and 18 to water quality and availability. The most frequently used suitability factors were road proximity, local market center distance, soil texture, soil slope, and water temperature. We listed 15 constraints that restrict or limit the selection of specific geographic locations for inland aquaculture. Urbanized areas, roads, and forests were the most frequently restricted areas. Geotechnologies provide powerful tools for spatial planning and management of aquaculture. Availability, quality, and access to spatial data are critical for the use of geotechnologies in the process of aquaculture site selection.
遥感(RS)和地理信息系统(GIS)已被用于指导选择适合水产养殖的地区。本文系统综述了文献报道的建立内陆池塘养殖的关键适宜性因素和制约因素。我们根据系统评价和荟萃分析(PRISMA)指南的首选报告项目在Scopus和Web of Science上检索了初步研究。1991年至2020年，在104种学术期刊上发表论文354篇。发表数量最多的年份出现在2020年，为22篇，过去30年发表的研究有增加的趋势。从12个选定的研究中，我们确定了48个适宜性因素，其中11个与土壤适宜性有关，19个与社会经济和基础设施适宜性有关，18个与水质和可用性有关。最常用的适宜性因子是道路距离、当地市场中心距离、土壤质地、土壤坡度和水温。我们列出了限制或限制内陆水产养殖特定地理位置选择的15个制约因素。城市化地区、道路和森林是最常见的限制区域。地质技术为水产养殖的空间规划和管理提供了有力的工具。空间数据的可用性、质量和获取对于在水产养殖场地选择过程中使用地质技术至关重要。
{"title":"Use of geotechnologies for aquaculture site selection: suitability factors and constraints for production in ground-excavated ponds","authors":"Darlan Roque Dapieve, M. Maggi, E. Mercante, Humberto Rodrigues Francisco, Daiane De Deus Oliveira, Olavo José Luiz Junior","doi":"10.3856/vol51-issue2-fulltext-2981","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2981","url":null,"abstract":"Remote sensing (RS) and geographic information systems (GIS) have been used to guide the selection of suitable areas for aquaculture. This systematic review synthesizes the key suitability factors and constraints reported in the literature for establishing inland pond aquaculture. We searched for primary studies on Scopus and Web of Science according to preferred reporting items for systemic reviews and meta-analysis (PRISMA) guidelines. Between 1991 and 2020, 354 articles were published in 104 academic journals. The maximum annual number of publications occurred in 2020, with 22 publications, and there is an increasing trend in studies published over the past 30 years. From 12 selected studies, we identified 48 suitability factors, 11 related to soil suitability, 19 to socioeconomic and infrastructure suitability, and 18 to water quality and availability. The most frequently used suitability factors were road proximity, local market center distance, soil texture, soil slope, and water temperature. We listed 15 constraints that restrict or limit the selection of specific geographic locations for inland aquaculture. Urbanized areas, roads, and forests were the most frequently restricted areas. Geotechnologies provide powerful tools for spatial planning and management of aquaculture. Availability, quality, and access to spatial data are critical for the use of geotechnologies in the process of aquaculture site selection.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42309170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2965
E. Ballester, Lilian Dena dos Santos, Vanessa Piovesan, I. V. Zadinelo
The present study evaluated the effect of different energy levels (15.07, 15.91, 17.17, 18.00, and 19.68 kJ g-1 of diet) on isoproteic practical diets for Macrobrachium amazonicum during the nursery phase on the zootechnical performance and proximate composition of the whole body. Postlarvae with a mean weight of 0.043 ± 0.01 g were stored in 25 experimental units, at 150 animals per m2, in a completely randomized design with five treatments and five replicates. The post-larvae were evaluated at the end of the experimental period according to the pre-established performance parameters. The analysis of variance for regression (α = 0.05) allowed us to estimate that the maximum final weight was observed in the treatment with 16.74 kJ g-1. In contrast, the lowest apparent feed conversion was observed at the 16.43 kJ g-1 level. The best values were found in 17.29 and 17.50 kJ g-1, respectively, for the energy and protein retention rates. As the best fit of the equation was presented for the energy retention ratio (R2 = 0.63), which approached the treatment of 17.17 kJ g-1, this energy level is recommended in postlarvae diets.
{"title":"Gross energy levels in practical diets for the Amazon river prawn postlarvae, Macrobrachium amazonicum","authors":"E. Ballester, Lilian Dena dos Santos, Vanessa Piovesan, I. V. Zadinelo","doi":"10.3856/vol51-issue2-fulltext-2965","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2965","url":null,"abstract":"The present study evaluated the effect of different energy levels (15.07, 15.91, 17.17, 18.00, and 19.68 kJ g-1 of diet) on isoproteic practical diets for Macrobrachium amazonicum during the nursery phase on the zootechnical performance and proximate composition of the whole body. Postlarvae with a mean weight of 0.043 ± 0.01 g were stored in 25 experimental units, at 150 animals per m2, in a completely randomized design with five treatments and five replicates. The post-larvae were evaluated at the end of the experimental period according to the pre-established performance parameters. The analysis of variance for regression (α = 0.05) allowed us to estimate that the maximum final weight was observed in the treatment with 16.74 kJ g-1. In contrast, the lowest apparent feed conversion was observed at the 16.43 kJ g-1 level. The best values were found in 17.29 and 17.50 kJ g-1, respectively, for the energy and protein retention rates. As the best fit of the equation was presented for the energy retention ratio (R2 = 0.63), which approached the treatment of 17.17 kJ g-1, this energy level is recommended in postlarvae diets.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44762292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2993
Jonas H. de S. Motta, E. Ballester, A. B. De Souza, M. Polese, M. C. Radael, L. Glória, M. V. Vidal Jr.
Four treatments were established to evaluate the effect of delayed first exogenous feeding and subsequent feeding periods on the development of goldfish larvae. The fasting and feeding periods were arranged as follows: T1 (0DFA:30DF), T2 (4DFA:26DF), T3 (8DFA:22DF), and T4 (12DFA:18DF), where DFA are the days of fasting and DF are the days of feeding. The larvae were kept in community tanks for each repetition, with 75 larvae per tank (3.75 larvae L-1). There was no significant difference in total length or final weight between larvae submitted to 0, 4, and 8 days of feed deprivation. However, larvae submitted to 12 DFA had higher values of the same variables than the other treatments. No significant difference in larval survival was observed between T1, T2, and T3, but T4 negatively influenced survival. Under the conditions evaluated, the point of no return was 4 DFA. Dead larvae were partly eaten in the fasting treatments. The delayed first feeding should be avoided in large-scale productions since it significantly reduces survival during cultivation. This article results from research funded by the Pescarte Environmental Education Project (PEA/IBAMA).
{"title":"Effect of periods of delayed first exogenous feeding in goldfish Carassius auratus (Linnaeus, 1758) larvae","authors":"Jonas H. de S. Motta, E. Ballester, A. B. De Souza, M. Polese, M. C. Radael, L. Glória, M. V. Vidal Jr.","doi":"10.3856/vol51-issue2-fulltext-2993","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2993","url":null,"abstract":"Four treatments were established to evaluate the effect of delayed first exogenous feeding and subsequent feeding periods on the development of goldfish larvae. The fasting and feeding periods were arranged as follows: T1 (0DFA:30DF), T2 (4DFA:26DF), T3 (8DFA:22DF), and T4 (12DFA:18DF), where DFA are the days of fasting and DF are the days of feeding. The larvae were kept in community tanks for each repetition, with 75 larvae per tank (3.75 larvae L-1). There was no significant difference in total length or final weight between larvae submitted to 0, 4, and 8 days of feed deprivation. However, larvae submitted to 12 DFA had higher values of the same variables than the other treatments. No significant difference in larval survival was observed between T1, T2, and T3, but T4 negatively influenced survival. Under the conditions evaluated, the point of no return was 4 DFA. Dead larvae were partly eaten in the fasting treatments. The delayed first feeding should be avoided in large-scale productions since it significantly reduces survival during cultivation. This article results from research funded by the Pescarte Environmental Education Project (PEA/IBAMA).","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48333918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2985
M. Avendaño, Marcela Cantillánez, M. Oliva, María González
For a population of locate, Thaisella chocolata, in La Rinconada, Chile, on a grid of 39 stations distributed along three 910 m-long transects at depths of 5 to 18.5 m, Moran and Morisita indices were used to evaluate whether density variations along the depth distribution are related to the stratification of larger sizes at the beginning of their reproductive process. Results indicate that before, during, and after forming reproductive aggregations, there is a T. chocolata increase in density in the shallow stratum (5 to 13 m). This finding is corroborated by the Moran index, which showed a greater autocorrelation in January-May, September-October, and January 2010, and by the Morisita index; thus, it is validated as a potentially easy-to-use indicator for assessing the reproductive process of this species. This index could also alert fishermen to the prevalence of reproductive aggregations in an area and that these aggregations should not be exploited as is currently the case to ensure the reproductive success of this species.
{"title":"Changes in the distribution density of locate, Thaisella chocolata (Duclos, 1832) (Gastropoda, Thaididae) as an indicator for predicting their reproductive events","authors":"M. Avendaño, Marcela Cantillánez, M. Oliva, María González","doi":"10.3856/vol51-issue2-fulltext-2985","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2985","url":null,"abstract":"For a population of locate, Thaisella chocolata, in La Rinconada, Chile, on a grid of 39 stations distributed along three 910 m-long transects at depths of 5 to 18.5 m, Moran and Morisita indices were used to evaluate whether density variations along the depth distribution are related to the stratification of larger sizes at the beginning of their reproductive process. Results indicate that before, during, and after forming reproductive aggregations, there is a T. chocolata increase in density in the shallow stratum (5 to 13 m). This finding is corroborated by the Moran index, which showed a greater autocorrelation in January-May, September-October, and January 2010, and by the Morisita index; thus, it is validated as a potentially easy-to-use indicator for assessing the reproductive process of this species. This index could also alert fishermen to the prevalence of reproductive aggregations in an area and that these aggregations should not be exploited as is currently the case to ensure the reproductive success of this species.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42302444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-30DOI: 10.3856/vol51-issue2-fulltext-2977
P. Bahamonde, W. Espejo, J. Celis, I. Montes, R. Barra
Anthropogenic activities and the demand for trace elements have risen, causing an increase in their environmental levels, which could affect biota. High levels of trace elements in living beings have been associated with toxicity, metabolic disorders, oxidative stress, and cancer. Seabirds, such as gulls, have been used as bioindicators of environmental pollution caused by anthropogenic sources. Gulls are widely distributed worldwide, usually occupying high trophic levels, and living close to humans. Among gulls, Larus spp. are omnivorous, predominantly carnivorous, nest on the ground, and capture live food or steal it opportunistically. The present work summarizes the data of trace elements found in eggs, feathers, blood, and feces, among other internal tissues, of several gull species of the genus Larus around the world. Most of the reports are from the Northern Hemisphere (70%), particularly from Europe and North America. The elements Cd, Hg, Mn, Pb, and Se are the most studied (54%), among which Hg represents about 19%. On the other hand, there is no information for lesser-known trace elements such as Rb, Ti, new technology elements (e.g. Ge, Re, Ta), rare earth elements (e.g. Ce, La, Y), or elements of the platinum group (e.g. Os, Ir, Ru). Even though Larus spp. is a suitable bioindicator of chemical contamination in marine ecosystems, only 28 of the 53 species of the Larus genus have been used on trace elements pollution. Future research should address lesser-known elements which are increasingly used by new technologies.
{"title":"A global-level assessment of gulls (Larus spp.) as bioindicators of trace elements in coastal ecosystems","authors":"P. Bahamonde, W. Espejo, J. Celis, I. Montes, R. Barra","doi":"10.3856/vol51-issue2-fulltext-2977","DOIUrl":"https://doi.org/10.3856/vol51-issue2-fulltext-2977","url":null,"abstract":"Anthropogenic activities and the demand for trace elements have risen, causing an increase in their environmental levels, which could affect biota. High levels of trace elements in living beings have been associated with toxicity, metabolic disorders, oxidative stress, and cancer. Seabirds, such as gulls, have been used as bioindicators of environmental pollution caused by anthropogenic sources. Gulls are widely distributed worldwide, usually occupying high trophic levels, and living close to humans. Among gulls, Larus spp. are omnivorous, predominantly carnivorous, nest on the ground, and capture live food or steal it opportunistically. The present work summarizes the data of trace elements found in eggs, feathers, blood, and feces, among other internal tissues, of several gull species of the genus Larus around the world. Most of the reports are from the Northern Hemisphere (70%), particularly from Europe and North America. The elements Cd, Hg, Mn, Pb, and Se are the most studied (54%), among which Hg represents about 19%. On the other hand, there is no information for lesser-known trace elements such as Rb, Ti, new technology elements (e.g. Ge, Re, Ta), rare earth elements (e.g. Ce, La, Y), or elements of the platinum group (e.g. Os, Ir, Ru). Even though Larus spp. is a suitable bioindicator of chemical contamination in marine ecosystems, only 28 of the 53 species of the Larus genus have been used on trace elements pollution. Future research should address lesser-known elements which are increasingly used by new technologies.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41819523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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