Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Iheringia. Série Zoologia |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100212 |
Resumo: | Abstract Food flexibility and omnivory are important features pronounced in Neotropical freshwater fish species, particularly for Astyanax species. Traditionally most fish diet resources are known to be originated in the aquatic environment, however recent studies have pointed to the importance of allochthonous sources. Besides, the colonization of macrophytes, common at several tropical reservoirs, may enhance insectivory in fish diet expanding or concentrating the area of available resources for feeding. Here we employed stomach contents analysis of two sympatric Astyanax species to access the importance of habitat differentiations as spatial complexity in two tropical reservoirs with different environmental features. The NMDS analysis indicated separation in the diet of these species between reservoirs (Stress= 8.28%). Additionally, analysis of variance revealed a significative difference in the volume of food itens ingested between the reservoirs (Anova one-way F(1, 132)=4.4446; p= 0.037). This points out the importance of environmental conditions on the composition of the diet of fishes. This study highlighted the insectivorous feeding habit of Astyanax species and revealed different feeding strategies between sympatric fishes despite high niche overlap in both environments. Habitat heterogeneity increasing food resources availability plays an important role in the diet strategy of these Astyanax species and on their constant maintenance in the two different reservoirs. |
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Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirsFeeding resourcesland-water ecotonetrophic ecologyAst yanax aff. bimaculatusAstyanax parahybaeAbstract Food flexibility and omnivory are important features pronounced in Neotropical freshwater fish species, particularly for Astyanax species. Traditionally most fish diet resources are known to be originated in the aquatic environment, however recent studies have pointed to the importance of allochthonous sources. Besides, the colonization of macrophytes, common at several tropical reservoirs, may enhance insectivory in fish diet expanding or concentrating the area of available resources for feeding. Here we employed stomach contents analysis of two sympatric Astyanax species to access the importance of habitat differentiations as spatial complexity in two tropical reservoirs with different environmental features. The NMDS analysis indicated separation in the diet of these species between reservoirs (Stress= 8.28%). Additionally, analysis of variance revealed a significative difference in the volume of food itens ingested between the reservoirs (Anova one-way F(1, 132)=4.4446; p= 0.037). This points out the importance of environmental conditions on the composition of the diet of fishes. This study highlighted the insectivorous feeding habit of Astyanax species and revealed different feeding strategies between sympatric fishes despite high niche overlap in both environments. Habitat heterogeneity increasing food resources availability plays an important role in the diet strategy of these Astyanax species and on their constant maintenance in the two different reservoirs.Museu de Ciências Naturais2016-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100212Iheringia. Série Zoologia v.106 2016reponame:Iheringia. Série Zoologiainstname:Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)instacron:FZB/RS10.1590/1678-4766e2016012info:eu-repo/semantics/openAccessLopes,Vanessa G.Nessimian,Jorge L.Da-Silva,Elidiomar R.Gomes,José Henrique C.Dias,Ana Carolina I. M.Souza,Leonardo C.Branco,Christina W.C.eng2016-07-05T00:00:00Zoai:scielo:S0073-47212016000100212Revistahttp://www.scielo.br/iszPUBhttps://old.scielo.br/oai/scielo-oai.php||iheringia-zoo@fzb.rs.gov.br1678-47660073-4721opendoar:2016-07-05T00:00Iheringia. Série Zoologia - Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)false |
dc.title.none.fl_str_mv |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs |
title |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs |
spellingShingle |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs Lopes,Vanessa G. Feeding resources land-water ecotone trophic ecology Ast yanax aff. bimaculatus Astyanax parahybae |
title_short |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs |
title_full |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs |
title_fullStr |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs |
title_full_unstemmed |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs |
title_sort |
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs |
author |
Lopes,Vanessa G. |
author_facet |
Lopes,Vanessa G. Nessimian,Jorge L. Da-Silva,Elidiomar R. Gomes,José Henrique C. Dias,Ana Carolina I. M. Souza,Leonardo C. Branco,Christina W.C. |
author_role |
author |
author2 |
Nessimian,Jorge L. Da-Silva,Elidiomar R. Gomes,José Henrique C. Dias,Ana Carolina I. M. Souza,Leonardo C. Branco,Christina W.C. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Lopes,Vanessa G. Nessimian,Jorge L. Da-Silva,Elidiomar R. Gomes,José Henrique C. Dias,Ana Carolina I. M. Souza,Leonardo C. Branco,Christina W.C. |
dc.subject.por.fl_str_mv |
Feeding resources land-water ecotone trophic ecology Ast yanax aff. bimaculatus Astyanax parahybae |
topic |
Feeding resources land-water ecotone trophic ecology Ast yanax aff. bimaculatus Astyanax parahybae |
description |
Abstract Food flexibility and omnivory are important features pronounced in Neotropical freshwater fish species, particularly for Astyanax species. Traditionally most fish diet resources are known to be originated in the aquatic environment, however recent studies have pointed to the importance of allochthonous sources. Besides, the colonization of macrophytes, common at several tropical reservoirs, may enhance insectivory in fish diet expanding or concentrating the area of available resources for feeding. Here we employed stomach contents analysis of two sympatric Astyanax species to access the importance of habitat differentiations as spatial complexity in two tropical reservoirs with different environmental features. The NMDS analysis indicated separation in the diet of these species between reservoirs (Stress= 8.28%). Additionally, analysis of variance revealed a significative difference in the volume of food itens ingested between the reservoirs (Anova one-way F(1, 132)=4.4446; p= 0.037). This points out the importance of environmental conditions on the composition of the diet of fishes. This study highlighted the insectivorous feeding habit of Astyanax species and revealed different feeding strategies between sympatric fishes despite high niche overlap in both environments. Habitat heterogeneity increasing food resources availability plays an important role in the diet strategy of these Astyanax species and on their constant maintenance in the two different reservoirs. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01 |
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=S0073-47212016000100212 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100212 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1678-4766e2016012 |
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 |
Museu de Ciências Naturais |
publisher.none.fl_str_mv |
Museu de Ciências Naturais |
dc.source.none.fl_str_mv |
Iheringia. Série Zoologia v.106 2016 reponame:Iheringia. Série Zoologia instname:Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) instacron:FZB/RS |
instname_str |
Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) |
instacron_str |
FZB/RS |
institution |
FZB/RS |
reponame_str |
Iheringia. Série Zoologia |
collection |
Iheringia. Série Zoologia |
repository.name.fl_str_mv |
Iheringia. Série Zoologia - Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) |
repository.mail.fl_str_mv |
||iheringia-zoo@fzb.rs.gov.br |
_version_ |
1754203964779266048 |