Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion
Autor(a) principal: | |
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Data de Publicação: | 2021 |
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=S1679-62252021000100202 |
Resumo: | ABSTRACT We aimed to improve the understanding of the establishment of Serrasalmus marginatus (non-native), which was followed by a decrease in the abundance of Serrasalmus maculatus (native) in the upper Paraná River floodplain. We estimated age, mortality rate, length and age at first maturity and variations in gonad development in three time-periods along a 26-year truncated time scale for both species. Population and reproduction parameters of both species showed substantial fluctuations among periods. Most age classes were sampled in all time-periods, but with considerable difference in abundance, with predominance of older individuals in the second time-period and younger individuals in the third time-period for both species. The mortality rates decreased for both species in the second time-period, but increased for the native in the third time-period. Length and age at first maturity decreased in the second time-period for both species, increasing the number of mature individuals on their populations. In the third time-period, the number of immature individuals increased for both species. We suggest that species experienced stressful conditions during cooccurrence and this have resulted in physiological responses in both species, reflecting in population and reproductive adjustments that may have relaxed competitive interactions between them, optimizing survival, reproductive effort and coexistence. |
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Neotropical ichthyology (Online) |
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Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasionAge structureBiological invasionsLength at first maturityMortalitySerrasalmusABSTRACT We aimed to improve the understanding of the establishment of Serrasalmus marginatus (non-native), which was followed by a decrease in the abundance of Serrasalmus maculatus (native) in the upper Paraná River floodplain. We estimated age, mortality rate, length and age at first maturity and variations in gonad development in three time-periods along a 26-year truncated time scale for both species. Population and reproduction parameters of both species showed substantial fluctuations among periods. Most age classes were sampled in all time-periods, but with considerable difference in abundance, with predominance of older individuals in the second time-period and younger individuals in the third time-period for both species. The mortality rates decreased for both species in the second time-period, but increased for the native in the third time-period. Length and age at first maturity decreased in the second time-period for both species, increasing the number of mature individuals on their populations. In the third time-period, the number of immature individuals increased for both species. We suggest that species experienced stressful conditions during cooccurrence and this have resulted in physiological responses in both species, reflecting in population and reproductive adjustments that may have relaxed competitive interactions between them, optimizing survival, reproductive effort and coexistence.Sociedade Brasileira de Ictiologia2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100202Neotropical Ichthyology v.19 n.1 2021reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-2020-0033info:eu-repo/semantics/openAccessRodrigues,Amanda CantaruteSantos,Natália Carneiro Lacerda dosBaumgartner,Matheus TenórioGomes,Luiz Carloseng2021-03-08T00:00:00Zoai:scielo:S1679-62252021000100202Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2021-03-08T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion |
title |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion |
spellingShingle |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion Rodrigues,Amanda Cantarute Age structure Biological invasions Length at first maturity Mortality Serrasalmus |
title_short |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion |
title_full |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion |
title_fullStr |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion |
title_full_unstemmed |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion |
title_sort |
Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion |
author |
Rodrigues,Amanda Cantarute |
author_facet |
Rodrigues,Amanda Cantarute Santos,Natália Carneiro Lacerda dos Baumgartner,Matheus Tenório Gomes,Luiz Carlos |
author_role |
author |
author2 |
Santos,Natália Carneiro Lacerda dos Baumgartner,Matheus Tenório Gomes,Luiz Carlos |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Rodrigues,Amanda Cantarute Santos,Natália Carneiro Lacerda dos Baumgartner,Matheus Tenório Gomes,Luiz Carlos |
dc.subject.por.fl_str_mv |
Age structure Biological invasions Length at first maturity Mortality Serrasalmus |
topic |
Age structure Biological invasions Length at first maturity Mortality Serrasalmus |
description |
ABSTRACT We aimed to improve the understanding of the establishment of Serrasalmus marginatus (non-native), which was followed by a decrease in the abundance of Serrasalmus maculatus (native) in the upper Paraná River floodplain. We estimated age, mortality rate, length and age at first maturity and variations in gonad development in three time-periods along a 26-year truncated time scale for both species. Population and reproduction parameters of both species showed substantial fluctuations among periods. Most age classes were sampled in all time-periods, but with considerable difference in abundance, with predominance of older individuals in the second time-period and younger individuals in the third time-period for both species. The mortality rates decreased for both species in the second time-period, but increased for the native in the third time-period. Length and age at first maturity decreased in the second time-period for both species, increasing the number of mature individuals on their populations. In the third time-period, the number of immature individuals increased for both species. We suggest that species experienced stressful conditions during cooccurrence and this have resulted in physiological responses in both species, reflecting in population and reproductive adjustments that may have relaxed competitive interactions between them, optimizing survival, reproductive effort and coexistence. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
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=S1679-62252021000100202 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100202 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1982-0224-2020-0033 |
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.19 n.1 2021 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_ |
1752122183530840064 |