Pub Date : 2023-09-01DOI: 10.1163/15685403-bja10322
N. Azani, H. Liew, N. S. Redzuan, Abu Hena M. Kamal, N. W. Rasdi
Mesocyclops leuckarti is a zooplankton that is potentially suitable as a live food for freshwater fish larvae. Aquaculture farmers often struggled to create nutritious live feed to maximize the production of larval fish. This study aimed to determine the effects of different enrichments on life-table parameters, protein, lipid and fatty acid content of M. leuckarti when enriched with different dietary enrichments. In this study, five treatments for raising the copepod were compared: rice bran, soybean meal, Chlorella sp., Spirulina sp., and unenriched (control). The results showed that M. leuckarti after 16 days of cultivation enriched with rice bran produced a higher population density (53.3 ind/ml) and survival rate (97.4%) than when cultivated with any of the other diets. In terms of nutritional value, protein content was higher in M. leuckarti enriched with rice bran (52% DW) and soybean meal (53% DW). However, lipid content was highest in M. leuckarti enriched with rice bran (14% DW). Fatty acids, such as α-linolenic acid ALA (7.21%) and docosahexaenoic acid DHA (6.26%) were higher in M. leuckarti enriched with rice bran. Eicosapentaenoic acid EPA (7.16%) and arachidonic acid ARA (7.74%) were higher in M. leuckarti enriched with Chlorella sp. This study suggests that organic by-products are better sources for strengthening and improving the growth performance and life history of this copepod, and possibly also of zooplankton organisms in general.
{"title":"Reproduction rate and nutritional composition (proteins, lipids) of Mesocyclops leuckarti (Copepoda, Cyclopoida) enriched with organic diets for aquacultural purposes","authors":"N. Azani, H. Liew, N. S. Redzuan, Abu Hena M. Kamal, N. W. Rasdi","doi":"10.1163/15685403-bja10322","DOIUrl":"https://doi.org/10.1163/15685403-bja10322","url":null,"abstract":"\u0000Mesocyclops leuckarti is a zooplankton that is potentially suitable as a live food for freshwater fish larvae. Aquaculture farmers often struggled to create nutritious live feed to maximize the production of larval fish. This study aimed to determine the effects of different enrichments on life-table parameters, protein, lipid and fatty acid content of M. leuckarti when enriched with different dietary enrichments. In this study, five treatments for raising the copepod were compared: rice bran, soybean meal, Chlorella sp., Spirulina sp., and unenriched (control). The results showed that M. leuckarti after 16 days of cultivation enriched with rice bran produced a higher population density (53.3 ind/ml) and survival rate (97.4%) than when cultivated with any of the other diets. In terms of nutritional value, protein content was higher in M. leuckarti enriched with rice bran (52% DW) and soybean meal (53% DW). However, lipid content was highest in M. leuckarti enriched with rice bran (14% DW). Fatty acids, such as α-linolenic acid ALA (7.21%) and docosahexaenoic acid DHA (6.26%) were higher in M. leuckarti enriched with rice bran. Eicosapentaenoic acid EPA (7.16%) and arachidonic acid ARA (7.74%) were higher in M. leuckarti enriched with Chlorella sp. This study suggests that organic by-products are better sources for strengthening and improving the growth performance and life history of this copepod, and possibly also of zooplankton organisms in general.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43790310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-15DOI: 10.1163/15685403-bja10317
Alma L. León-Valdez, E. Aragón-Noriega, J. A. Félix-Ortiz, J. Arzola-González, Jorge Payan-Alejo, W. Valenzuela-Quiñónez, Alejo A. Valdez-Camacho
In Mexico, the spiny lobster fishery is well established but this is not the case with the slipper lobster fishery. For a sustainable fishery, many biological traits must be known, one of which is growth. The objective of the present study was to probe the multi-model approach to identify the curve that best describes the growth of Evibacus princeps from the Gulf of California. Specimens were collected aboard commercial trawlers during the industrial shrimp fishing season (October 2021-March 2022) at depths ranging from 10 to 55 m. Five versions of the Schnute model (including the Von Bertalanffy model) were applied and the best model was selected using the Bayesian information criterion. The estimation of an average model was performed because no model obtained 90% of the evidence. E. princeps from the Gulf of California exhibit an indeterminate growth pattern.
{"title":"Multi-model approach for growth analysis of Evibacus princeps Smith, 1869 (Decapoda, Scyllaridae) in the Gulf of California","authors":"Alma L. León-Valdez, E. Aragón-Noriega, J. A. Félix-Ortiz, J. Arzola-González, Jorge Payan-Alejo, W. Valenzuela-Quiñónez, Alejo A. Valdez-Camacho","doi":"10.1163/15685403-bja10317","DOIUrl":"https://doi.org/10.1163/15685403-bja10317","url":null,"abstract":"\u0000In Mexico, the spiny lobster fishery is well established but this is not the case with the slipper lobster fishery. For a sustainable fishery, many biological traits must be known, one of which is growth. The objective of the present study was to probe the multi-model approach to identify the curve that best describes the growth of Evibacus princeps from the Gulf of California. Specimens were collected aboard commercial trawlers during the industrial shrimp fishing season (October 2021-March 2022) at depths ranging from 10 to 55 m. Five versions of the Schnute model (including the Von Bertalanffy model) were applied and the best model was selected using the Bayesian information criterion. The estimation of an average model was performed because no model obtained 90% of the evidence. E. princeps from the Gulf of California exhibit an indeterminate growth pattern.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46757198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-15DOI: 10.1163/15685403-bja10309
Alfredo Ulloa-Yáñez, G. Figueroa-Muñoz, Daniela Núñez, L. Boyero, P. R. De los Ríos-Escalante, Juan Martin, Ximena Jaque, C. Esse, F. Correa-Araneda
The tiger crab, Aegla concepcionensis, is a threatened endemic freshwater decapod of Chile, distributed throughout small areas of the Mediterranean region of Central Chile (37°30′-38°00′S). Its habitat includes streams and lakes with riparian areas dominated by native plants, with little or null human intervention. To our knowledge, the tiger crab’s distribution is limited and human stressors (e.g., water withdrawal, exotic tree plantations and climate change) have led to degradation of its habitat. Based on the presence of these stressors and the virtual lack of knowledge of its ecology, the tiger crab has been categorized as Endangered (EN). This study presents a preliminary description of the species’ ecology based on its abundance and its morphometrics, as well as on its feeding habits in Caburgua lake, South Central Chile. We established 16 sampling points, half of which in the shallow bathymetric stratum (0-10 m depth) of the lake itself, and half in the Lumaco stream, one of the lake’s tributaries. We used baited traps to capture specimens. A. concepcionensis appeared to be found in the lake’s shallow bathymetric stratum, but not in the stream. Individuals showed negative allometric growth, males were larger than females, and they showed scavenger feeding behaviour. Our findings provide useful information to help with tiger crab conservation, although more extensive surveys will be required to collect sufficient data for establishing a robust conservation program for the species in the study area.
{"title":"Preliminary records of abundance and morphometry of the tiger crab, Aegla concepcionensis (Schmitt, 1942) (Anomura, Aeglidae) in a lake of southern Chile","authors":"Alfredo Ulloa-Yáñez, G. Figueroa-Muñoz, Daniela Núñez, L. Boyero, P. R. De los Ríos-Escalante, Juan Martin, Ximena Jaque, C. Esse, F. Correa-Araneda","doi":"10.1163/15685403-bja10309","DOIUrl":"https://doi.org/10.1163/15685403-bja10309","url":null,"abstract":"\u0000The tiger crab, Aegla concepcionensis, is a threatened endemic freshwater decapod of Chile, distributed throughout small areas of the Mediterranean region of Central Chile (37°30′-38°00′S). Its habitat includes streams and lakes with riparian areas dominated by native plants, with little or null human intervention. To our knowledge, the tiger crab’s distribution is limited and human stressors (e.g., water withdrawal, exotic tree plantations and climate change) have led to degradation of its habitat. Based on the presence of these stressors and the virtual lack of knowledge of its ecology, the tiger crab has been categorized as Endangered (EN). This study presents a preliminary description of the species’ ecology based on its abundance and its morphometrics, as well as on its feeding habits in Caburgua lake, South Central Chile. We established 16 sampling points, half of which in the shallow bathymetric stratum (0-10 m depth) of the lake itself, and half in the Lumaco stream, one of the lake’s tributaries. We used baited traps to capture specimens. A. concepcionensis appeared to be found in the lake’s shallow bathymetric stratum, but not in the stream. Individuals showed negative allometric growth, males were larger than females, and they showed scavenger feeding behaviour. Our findings provide useful information to help with tiger crab conservation, although more extensive surveys will be required to collect sufficient data for establishing a robust conservation program for the species in the study area.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46526671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-15DOI: 10.1163/15685403-bja10308
C. Boyko, S. De Grave
Gossea Agassiz, 1862 (Cnidaria: Hydrozoa) and Gossea Spence Bate & Westwood, 1862 (Crustacea: Amphipoda) are homonyms and Agassiz’s genus has long been considered the senior name. Discovery of copyright information for Agassiz’s book shows that the presumed order of precedence is incorrect and that Spence Bate & Westwood’s genus name is the senior homonym. A detailed history of both genera is given with the recognition that Apherusa Walker, 1891 is an unnecessary replacement name for Gossea Spence Bate & Westwood, 1862 and that Octobulbacea Zamponi, 1983, as the only available junior synonym, is the name that should be used for Gossea Agassiz, 1862.
{"title":"Gossea Spence Bate & Westwood, 1862 (Amphipoda) and Gossea Agassiz, 1862 (Cnidaria, Hydrozoa): reversal of presumed precedence and review of the complicated nomenclatural history","authors":"C. Boyko, S. De Grave","doi":"10.1163/15685403-bja10308","DOIUrl":"https://doi.org/10.1163/15685403-bja10308","url":null,"abstract":"\u0000Gossea Agassiz, 1862 (Cnidaria: Hydrozoa) and Gossea Spence Bate & Westwood, 1862 (Crustacea: Amphipoda) are homonyms and Agassiz’s genus has long been considered the senior name. Discovery of copyright information for Agassiz’s book shows that the presumed order of precedence is incorrect and that Spence Bate & Westwood’s genus name is the senior homonym. A detailed history of both genera is given with the recognition that Apherusa Walker, 1891 is an unnecessary replacement name for Gossea Spence Bate & Westwood, 1862 and that Octobulbacea Zamponi, 1983, as the only available junior synonym, is the name that should be used for Gossea Agassiz, 1862.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49536373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-15DOI: 10.1163/15685403-bja10311
Robert C. Homan, K. Baker, B. Roth, Kelley R. Smith
This research seeks to create a predictive model of habitat suitability for use in determining waterbodies vulnerable to introduced species within the state of Michigan. Three members of the genus Faxonius (Decapoda, Cambaridae) were selected as test taxa for the model due to several species’ propensity for significantly altering the ecosystems they inhabit in Michigan and elsewhere. Michigan State University and the Michigan Department of Natural Resources (MDNR) conducted extensive field surveys of crayfish species assemblages across 461 stream sites from 2014-2016. This project compares these field data to data from publicly available national datasets with the purpose of revealing ecosystems that are vulnerable to population expansion. We identify patterns in Faxonius habitat at local (100 acres) and landscape (1000 acres) scales by associating crayfish occurrences throughout Michigan with variables characterizing landscape conditions thought to be important factors affecting their spread, growth, and survival. An Artificial Neural Network (ANN) model using variables from Soil Survey Geographic Database (SSURGO) and National Land Cover Database (NLCD) successfully identified stream sites and watersheds in Michigan vulnerable to range expansion by Faxonius rusticus (Girard, 1852), Faxonius propinquus (Girard, 1852), and/or Faxonius virilis (Hagen, 1870). We found several habitat variables that influence our predictions. The most important variable describing F. rusticus presence was local (100-acre) scale Open Water land cover class, whereas for F. propinquus, the high-intensity developed land cover class at the local scale was the most important, while it was the shrubland land cover class at the local scale for F. virilis. This research demonstrates a powerful method to identify locations using remote sensing data that can be prioritized for conservation efforts that are threatened by invasive crayfish species.
{"title":"Creating a distribution model of three crayfish species of the genus Faxonius (Decapoda, Cambaridae) in Michigan streams using publicly accessible data","authors":"Robert C. Homan, K. Baker, B. Roth, Kelley R. Smith","doi":"10.1163/15685403-bja10311","DOIUrl":"https://doi.org/10.1163/15685403-bja10311","url":null,"abstract":"\u0000This research seeks to create a predictive model of habitat suitability for use in determining waterbodies vulnerable to introduced species within the state of Michigan. Three members of the genus Faxonius (Decapoda, Cambaridae) were selected as test taxa for the model due to several species’ propensity for significantly altering the ecosystems they inhabit in Michigan and elsewhere. Michigan State University and the Michigan Department of Natural Resources (MDNR) conducted extensive field surveys of crayfish species assemblages across 461 stream sites from 2014-2016. This project compares these field data to data from publicly available national datasets with the purpose of revealing ecosystems that are vulnerable to population expansion. We identify patterns in Faxonius habitat at local (100 acres) and landscape (1000 acres) scales by associating crayfish occurrences throughout Michigan with variables characterizing landscape conditions thought to be important factors affecting their spread, growth, and survival. An Artificial Neural Network (ANN) model using variables from Soil Survey Geographic Database (SSURGO) and National Land Cover Database (NLCD) successfully identified stream sites and watersheds in Michigan vulnerable to range expansion by Faxonius rusticus (Girard, 1852), Faxonius propinquus (Girard, 1852), and/or Faxonius virilis (Hagen, 1870). We found several habitat variables that influence our predictions. The most important variable describing F. rusticus presence was local (100-acre) scale Open Water land cover class, whereas for F. propinquus, the high-intensity developed land cover class at the local scale was the most important, while it was the shrubland land cover class at the local scale for F. virilis. This research demonstrates a powerful method to identify locations using remote sensing data that can be prioritized for conservation efforts that are threatened by invasive crayfish species.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48972120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-15DOI: 10.1163/15685403-bja10307
Xinjie Liang, Yuman Sun, Yingying Ye, Jiji Li
We analysed the mitochondrial genome of Aristaeopsis edwardsiana (Johnson, 1868) to understand its origin and evolution. Our study uncovered new insights into its phylogenetic relationships and evolutionary history. The mitogenome of A. edwardsiana is 15 913 bp, contains 37 genes, including 13 protein-coding genes (PCGs), 2 ribosomal RNA genes (rRNA) and 22 transfer RNA genes (tRNA). The AT content is 64.98%, with negative AT and GC skews. Our analysis showed that the PCGs of A. edwardsiana and related Aristeidae species underwent purifying selection. The tRNA genes exhibited a typical structure, except trnC and trnS1. The gene order was conserved compared to ancestral decapods. Using species of Dendrobranchiata, we constructed a phylogenetic tree, revealing the relationship of A. edwardsiana within the family Aristeidae. These findings improve our understanding of Decapoda classification and Aristeidae’s evolutionary position, facilitating further phylogenetic investigations. This study may serve as a valuable reference for future research on species of Aristeidae.
{"title":"Characterization of the complete mitochondrial genome of Aristaeopsis edwardsiana (Decapoda, Dendrobranchiata) and the phylogenetic implications for Aristeidae","authors":"Xinjie Liang, Yuman Sun, Yingying Ye, Jiji Li","doi":"10.1163/15685403-bja10307","DOIUrl":"https://doi.org/10.1163/15685403-bja10307","url":null,"abstract":"\u0000We analysed the mitochondrial genome of Aristaeopsis edwardsiana (Johnson, 1868) to understand its origin and evolution. Our study uncovered new insights into its phylogenetic relationships and evolutionary history. The mitogenome of A. edwardsiana is 15 913 bp, contains 37 genes, including 13 protein-coding genes (PCGs), 2 ribosomal RNA genes (rRNA) and 22 transfer RNA genes (tRNA). The AT content is 64.98%, with negative AT and GC skews. Our analysis showed that the PCGs of A. edwardsiana and related Aristeidae species underwent purifying selection. The tRNA genes exhibited a typical structure, except trnC and trnS1. The gene order was conserved compared to ancestral decapods. Using species of Dendrobranchiata, we constructed a phylogenetic tree, revealing the relationship of A. edwardsiana within the family Aristeidae. These findings improve our understanding of Decapoda classification and Aristeidae’s evolutionary position, facilitating further phylogenetic investigations. This study may serve as a valuable reference for future research on species of Aristeidae.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41940708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.1163/15685403-bja10299
K. Izawa
Shiinoa prionura Izawa, 2009 is redescribed based on specimens of both sexes recovered from the nasal cavity of the barred knifejaw Oplegnathus fasciatus (Temminck & Schlegel, 1844) (Centrarchiformes, Oplegnathidae) in Japan. The male of the species is described for the first time.
{"title":"Redescription of Shiinoa prionura Izawa, 2009 (Copepoda, Cyclopoida, Shiinoidae) recovered from Oplegnathus fusciatus (Temminck & Schlegel, 1844) (Actinopterygii) in Japan, with description of the male for the species","authors":"K. Izawa","doi":"10.1163/15685403-bja10299","DOIUrl":"https://doi.org/10.1163/15685403-bja10299","url":null,"abstract":"\u0000Shiinoa prionura Izawa, 2009 is redescribed based on specimens of both sexes recovered from the nasal cavity of the barred knifejaw Oplegnathus fasciatus (Temminck & Schlegel, 1844) (Centrarchiformes, Oplegnathidae) in Japan. The male of the species is described for the first time.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43765286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.1163/15685403-bja10304
S. W. Sintondji, Z. Sohou, Appolinaire Goussanou, Théophile Godome, K. Baetens, G. Lacroix, E. Fiogbé
The aim of this work was to evaluate the spatial and temporal distribution of shrimp species in the Lake Nokoué-Cotonou Channel complex for an efficient management of the fishery. The results of one year sampling from five stations (North, South, East, Central and West) in the complex revealed the following proportions: Penaeus notialis 73.68%, Macrobrachium macrobrachion 13.81%, Macrobrachium vollenhovenii 5.36%, Penaeus monodon 2.68%, Macrobrachium felicinum 2.20%, Penaeus kerathurus 1.72%, Macrobrachium cf. zariquieyi 0.27%, and Macrobrachium equidens 0.27%. The species M. cf. zariquieyi and M. equidens were never reported from Benin, but are now found in Lake Nokoué. Spatially, Penaeus (Penaeus notialis) are more abundant in the west (Acadja concentration zone), while Macrobrachium (Macrobrachium macrobrachion) are more dominant in the east (near the Ouémé entrance) and north (near the Sô entrance) of the lake. Penaeus are strongly present in the lagoon complex from January to August, while Macrobrachium are more abundant in Lake Nokoué from September to December. Spearman’s correlation analysis revealed that increasing salinity, pH, transparency and total dissolved solids (TDS) positively influenced the abundance of P. notialis, while increasing salinity, pH, transparency, and TDS negatively influenced the abundance of M. macrobrachion at the 5% significance level. For an efficient management of the shrimp fishery, it is desirable that the shrimp fishery in Lake Nokoué, mainly in the Cotonou Channel, which is a very sensitive area for their seasonal migrations, benefits from at least three months of respite per year, from November to January. This period corresponds to the strong migration of juvenile Penaeus towards the lake. This should allow many Penaeus to grow up and breed at least once in their lives, according to the species’ life cycle presented.
{"title":"Distribution model of shrimp species in Lake Nokoué, southern Benin, West Africa","authors":"S. W. Sintondji, Z. Sohou, Appolinaire Goussanou, Théophile Godome, K. Baetens, G. Lacroix, E. Fiogbé","doi":"10.1163/15685403-bja10304","DOIUrl":"https://doi.org/10.1163/15685403-bja10304","url":null,"abstract":"\u0000The aim of this work was to evaluate the spatial and temporal distribution of shrimp species in the Lake Nokoué-Cotonou Channel complex for an efficient management of the fishery. The results of one year sampling from five stations (North, South, East, Central and West) in the complex revealed the following proportions: Penaeus notialis 73.68%, Macrobrachium macrobrachion 13.81%, Macrobrachium vollenhovenii 5.36%, Penaeus monodon 2.68%, Macrobrachium felicinum 2.20%, Penaeus kerathurus 1.72%, Macrobrachium cf. zariquieyi 0.27%, and Macrobrachium equidens 0.27%. The species M. cf. zariquieyi and M. equidens were never reported from Benin, but are now found in Lake Nokoué. Spatially, Penaeus (Penaeus notialis) are more abundant in the west (Acadja concentration zone), while Macrobrachium (Macrobrachium macrobrachion) are more dominant in the east (near the Ouémé entrance) and north (near the Sô entrance) of the lake. Penaeus are strongly present in the lagoon complex from January to August, while Macrobrachium are more abundant in Lake Nokoué from September to December. Spearman’s correlation analysis revealed that increasing salinity, pH, transparency and total dissolved solids (TDS) positively influenced the abundance of P. notialis, while increasing salinity, pH, transparency, and TDS negatively influenced the abundance of M. macrobrachion at the 5% significance level. For an efficient management of the shrimp fishery, it is desirable that the shrimp fishery in Lake Nokoué, mainly in the Cotonou Channel, which is a very sensitive area for their seasonal migrations, benefits from at least three months of respite per year, from November to January. This period corresponds to the strong migration of juvenile Penaeus towards the lake. This should allow many Penaeus to grow up and breed at least once in their lives, according to the species’ life cycle presented.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46042596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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