Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events

Here, we describe population and reproductive dynamics of four populations of Macrobrachium amazonicum in reservoirs during drought events. Additionally, we analyze possible phenotypic changes in this species promoted by fish predation. Two populations had a large-size phenotype (with large body pro...

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Detalles Bibliográficos
Autores: Paschoal, Lucas Rezende Penido [UNESP], Zara, Fernando José [UNESP]
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:Brasil
Institución:Universidade Estadual Paulista (UNESP)
Repositorio:Repositório Institucional da UNESP
Idioma:inglés
OAI Identifier:oai:repositorio.unesp.br:11449/304244
Acceso en línea:http://dx.doi.org/10.26496/bjz.2024.193
https://hdl.handle.net/11449/304244
Access Level:acceso abierto
Palabra clave:Caridea
drought
phenotypes
reproduction
synergistic events
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spelling Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought eventsCarideadroughtphenotypesreproductionsynergistic eventsHere, we describe population and reproductive dynamics of four populations of Macrobrachium amazonicum in reservoirs during drought events. Additionally, we analyze possible phenotypic changes in this species promoted by fish predation. Two populations had a large-size phenotype (with large body proportions and morphotypes in males) while a small-size phenotype (with reduced sizes and no morphotypes) was found in the two other populations. Overall, females were larger than males and there were varying sex ratios among the four studied populations. All populations had bimodal or polymodal patterns in their monthly size-class frequency, suggesting a seasonal influence and a potentially great capacity of these populations to adapt to adverse environmental conditions. No major changes were found in the patterns of sex ratio, recruitment, frequency of (larger) male morphotypes and female ovarian development stages during drought events. Macrobrachium amazonicum is a resilient species and undergoes continuous reproduction. Females with immature ovaries were predominant in all populations, performing multiple spawns and exhibiting rapid ovarian development cycles. In males, the initial morphotype (TC-translucent claw) was predominant in populations with a social hierarchy. Males of dominant morphotypes (GC1 and GC2-green claw 1 and 2) use more energy to carry out and maintain metabolic processes, which could probably one of the explanations why their number in populations are limited. We did not find any clear evidence that fish predation affected phenotypes, suggesting that phenotypic plasticity could be more related to intrinsic factors, which would have to be further investigated.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Invertebrate Morphology Laboratory (IML) Department of Biology Agricultural and Veterinary School of Jaboticabal and Aquaculture Center of UNESP (CAUNESP) São Paulo State University (UNESP), São PauloFaculdades de Inovação e Tecnologia de Minas Gerais (FIT-MG), Minas GeraisPostgraduate Course in Biological Sciences (Zoology)/Ecology Evolution and Biodiversity (EcoEvoBio) São Paulo State University (UNESP) Biosciences Institute of Rio Claro, São PauloInvertebrate Morphology Laboratory (IML) Department of Biology Agricultural and Veterinary School of Jaboticabal and Aquaculture Center of UNESP (CAUNESP) São Paulo State University (UNESP), São PauloPostgraduate Course in Biological Sciences (Zoology)/Ecology Evolution and Biodiversity (EcoEvoBio) São Paulo State University (UNESP) Biosciences Institute of Rio Claro, São PauloCAPES: 001CAPES: 23038.004309/2014–5Universidade Estadual Paulista (UNESP)Faculdades de Inovação e Tecnologia de Minas Gerais (FIT-MG)2025-04-29T19:34:18Z2024-01-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article139-160http://dx.doi.org/10.26496/bjz.2024.193Belgian Journal of Zoology, v. 154, p. 139-160.2295-04510777-6276https://hdl.handle.net/11449/30424410.26496/bjz.2024.1932-s2.0-85206574246Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBelgian Journal of Zoologyinfo:eu-repo/semantics/openAccessPaschoal, Lucas Rezende Penido [UNESP]Zara, Fernando José [UNESP]2025-11-26T17:36:51Zoai:repositorio.unesp.br:11449/304244Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462025-11-26T17:36:51Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
title Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
spellingShingle Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
Paschoal, Lucas Rezende Penido [UNESP]
Caridea
drought
phenotypes
reproduction
synergistic events
title_short Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
title_full Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
title_fullStr Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
title_full_unstemmed Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
title_sort Population dynamics and reproductive features of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) in Neotropical reservoirs under drought events
dc.creator.none.fl_str_mv Paschoal, Lucas Rezende Penido [UNESP]
Zara, Fernando José [UNESP]
author Paschoal, Lucas Rezende Penido [UNESP]
author_facet Paschoal, Lucas Rezende Penido [UNESP]
Zara, Fernando José [UNESP]
author_role author
author2 Zara, Fernando José [UNESP]
author2_role author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Faculdades de Inovação e Tecnologia de Minas Gerais (FIT-MG)
dc.subject.por.fl_str_mv Caridea
drought
phenotypes
reproduction
synergistic events
topic Caridea
drought
phenotypes
reproduction
synergistic events
description Here, we describe population and reproductive dynamics of four populations of Macrobrachium amazonicum in reservoirs during drought events. Additionally, we analyze possible phenotypic changes in this species promoted by fish predation. Two populations had a large-size phenotype (with large body proportions and morphotypes in males) while a small-size phenotype (with reduced sizes and no morphotypes) was found in the two other populations. Overall, females were larger than males and there were varying sex ratios among the four studied populations. All populations had bimodal or polymodal patterns in their monthly size-class frequency, suggesting a seasonal influence and a potentially great capacity of these populations to adapt to adverse environmental conditions. No major changes were found in the patterns of sex ratio, recruitment, frequency of (larger) male morphotypes and female ovarian development stages during drought events. Macrobrachium amazonicum is a resilient species and undergoes continuous reproduction. Females with immature ovaries were predominant in all populations, performing multiple spawns and exhibiting rapid ovarian development cycles. In males, the initial morphotype (TC-translucent claw) was predominant in populations with a social hierarchy. Males of dominant morphotypes (GC1 and GC2-green claw 1 and 2) use more energy to carry out and maintain metabolic processes, which could probably one of the explanations why their number in populations are limited. We did not find any clear evidence that fish predation affected phenotypes, suggesting that phenotypic plasticity could be more related to intrinsic factors, which would have to be further investigated.
publishDate 2024
dc.date.none.fl_str_mv 2024-01-12
2025-04-29T19:34:18Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.26496/bjz.2024.193
Belgian Journal of Zoology, v. 154, p. 139-160.
2295-0451
0777-6276
https://hdl.handle.net/11449/304244
10.26496/bjz.2024.193
2-s2.0-85206574246
url http://dx.doi.org/10.26496/bjz.2024.193
https://hdl.handle.net/11449/304244
identifier_str_mv Belgian Journal of Zoology, v. 154, p. 139-160.
2295-0451
0777-6276
10.26496/bjz.2024.193
2-s2.0-85206574246
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Belgian Journal of Zoology
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 139-160
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv repositoriounesp@unesp.br
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score 15.301629

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