Genetic diversity and aquaculture conservation for a threatened Neotropical catfish
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Neotropical ichthyology (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300211 |
Resumo: | Abstract Due to the ecological importance of Lophiosilurus alexandri, the present work evaluated its genetic representativeness by comparing wild stocks to broodstocks that were kept at three restocking hatcheries along the São Francisco River. A total of 97 samples were genotyped for newly developed microsatellite markers. Low levels of genetic diversity (average alleles number of 4.2 alleles) were detected in all cases, being more severe in captive groups. Significant pairwise FST and DEST values, Structure, and DAPC analyses showed that wild animals were structured in two groups, and a third group was formed by captive animals, evidencing the need to adopt genetic criteria to retain genetic diversity in the hatcheries. For this reason, three full-sib families were constructed to select the best relatedness estimator for L. alexandri and establish a cut-off value aimed to avoid full-sibling matings in the hatcheries. Two estimators, Wang (RW) and Lynch & Li (RLL), were accurate in reflecting the relatedness level for full-sibs in this species. According to them, less than 50% of the potential breeding matings in the three hatcheries are advisable. The innate low diversity of L. alexandri highlights the importance of minimizing inbreeding and retaining genetic diversity towards the species recovery. |
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Genetic diversity and aquaculture conservation for a threatened Neotropical catfishLophiosilurus alexandriLow genetic diversityRelatedness estimatorRestockingSedentary behaviorAbstract Due to the ecological importance of Lophiosilurus alexandri, the present work evaluated its genetic representativeness by comparing wild stocks to broodstocks that were kept at three restocking hatcheries along the São Francisco River. A total of 97 samples were genotyped for newly developed microsatellite markers. Low levels of genetic diversity (average alleles number of 4.2 alleles) were detected in all cases, being more severe in captive groups. Significant pairwise FST and DEST values, Structure, and DAPC analyses showed that wild animals were structured in two groups, and a third group was formed by captive animals, evidencing the need to adopt genetic criteria to retain genetic diversity in the hatcheries. For this reason, three full-sib families were constructed to select the best relatedness estimator for L. alexandri and establish a cut-off value aimed to avoid full-sibling matings in the hatcheries. Two estimators, Wang (RW) and Lynch & Li (RLL), were accurate in reflecting the relatedness level for full-sibs in this species. According to them, less than 50% of the potential breeding matings in the three hatcheries are advisable. The innate low diversity of L. alexandri highlights the importance of minimizing inbreeding and retaining genetic diversity towards the species recovery.Sociedade Brasileira de Ictiologia2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300211Neotropical Ichthyology v.18 n.3 2020reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-2020-0028info:eu-repo/semantics/openAccessFarias,Renata S.Silva,Bruno C. N. R.Nascimento,Wilka V. G.Silva,Gênison C.Luz,Ronald K.Prosdocimi,FranciscoFigueiredo,Rozzanno A. C. R.Carvalho,Daniel C.Coimbra,Maria R. M.eng2020-10-15T00:00:00Zoai:scielo:S1679-62252020000300211Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2020-10-15T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish |
title |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish |
spellingShingle |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish Farias,Renata S. Lophiosilurus alexandri Low genetic diversity Relatedness estimator Restocking Sedentary behavior |
title_short |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish |
title_full |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish |
title_fullStr |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish |
title_full_unstemmed |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish |
title_sort |
Genetic diversity and aquaculture conservation for a threatened Neotropical catfish |
author |
Farias,Renata S. |
author_facet |
Farias,Renata S. Silva,Bruno C. N. R. Nascimento,Wilka V. G. Silva,Gênison C. Luz,Ronald K. Prosdocimi,Francisco Figueiredo,Rozzanno A. C. R. Carvalho,Daniel C. Coimbra,Maria R. M. |
author_role |
author |
author2 |
Silva,Bruno C. N. R. Nascimento,Wilka V. G. Silva,Gênison C. Luz,Ronald K. Prosdocimi,Francisco Figueiredo,Rozzanno A. C. R. Carvalho,Daniel C. Coimbra,Maria R. M. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Farias,Renata S. Silva,Bruno C. N. R. Nascimento,Wilka V. G. Silva,Gênison C. Luz,Ronald K. Prosdocimi,Francisco Figueiredo,Rozzanno A. C. R. Carvalho,Daniel C. Coimbra,Maria R. M. |
dc.subject.por.fl_str_mv |
Lophiosilurus alexandri Low genetic diversity Relatedness estimator Restocking Sedentary behavior |
topic |
Lophiosilurus alexandri Low genetic diversity Relatedness estimator Restocking Sedentary behavior |
description |
Abstract Due to the ecological importance of Lophiosilurus alexandri, the present work evaluated its genetic representativeness by comparing wild stocks to broodstocks that were kept at three restocking hatcheries along the São Francisco River. A total of 97 samples were genotyped for newly developed microsatellite markers. Low levels of genetic diversity (average alleles number of 4.2 alleles) were detected in all cases, being more severe in captive groups. Significant pairwise FST and DEST values, Structure, and DAPC analyses showed that wild animals were structured in two groups, and a third group was formed by captive animals, evidencing the need to adopt genetic criteria to retain genetic diversity in the hatcheries. For this reason, three full-sib families were constructed to select the best relatedness estimator for L. alexandri and establish a cut-off value aimed to avoid full-sibling matings in the hatcheries. Two estimators, Wang (RW) and Lynch & Li (RLL), were accurate in reflecting the relatedness level for full-sibs in this species. According to them, less than 50% of the potential breeding matings in the three hatcheries are advisable. The innate low diversity of L. alexandri highlights the importance of minimizing inbreeding and retaining genetic diversity towards the species recovery. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300211 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300211 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1982-0224-2020-0028 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
dc.source.none.fl_str_mv |
Neotropical Ichthyology v.18 n.3 2020 reponame:Neotropical ichthyology (Online) instname:Sociedade Brasileira de Ictiologia (SBI) instacron:SBI |
instname_str |
Sociedade Brasileira de Ictiologia (SBI) |
instacron_str |
SBI |
institution |
SBI |
reponame_str |
Neotropical ichthyology (Online) |
collection |
Neotropical ichthyology (Online) |
repository.name.fl_str_mv |
Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI) |
repository.mail.fl_str_mv |
||neoichth@nupelia.uem.br |
_version_ |
1752122183243530240 |