Do hydroelectric dams affect the abundance and population structure of freshwater shrimps?
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4025/actascibiolsci.v42i2.48928 http://hdl.handle.net/11449/221512 |
Resumo: | Freshwater shrimps play an important role in many ecological processes since they are epibenthic detritivores but also prey on other invertebrates and are predated by fishes. The knowledge about their biology allow the development of management strategies to improve the use of natural resources by avoiding overfishing and enhancing productivity. Here we evaluated the population structure of the shrimp Macrobrachium amazonicum in the river Rio Grande, upstream of the Água Vermelha hydroelectric dam. They were captured monthly from October 2017 until March 2018, in six sites along the river. The first site was ∿1000 m distant from the dam and the sixth was ∿4000 m distant. A sac-like sieve and traps were used to capture the shrimps. The sieve was dragged three times for 180o. The traps were left by the river margins for six hours. In the laboratory, the shrimps were sexed and measured (carapace length; CL). In total, 6455 individuals were captured: 4499 females (294 breeding), 1445 males, and 217 juveniles. Female mean size was 7.50 ± 3.47 mm, male mean size was 7.44 ± 2.40 mm, and juvenile mean size was 3.24 ± 1.10 mm. The smallest individual was found in site III and it was a juvenile of 1.08 mm. The largest had 20 mm and was found in site II. The smallest breeding female had 3.8 mm CL. The largest individuals were more abundant in the sites near the dam, whereas the smallest were more abundant in the farthest sites. The highest abundance was seen in sites III and IV, and the lowest, in site VI. Unlike males and juveniles, females (both breeding and non-breeding) were more abundant (Anova, p < 0.01) near the dam. By knowing the population structure of M. amazonicum it is possible to understand how they are being affected by the environmental changes caused by the hydroelectric dam. |
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Do hydroelectric dams affect the abundance and population structure of freshwater shrimps?CrustaceaDamsDecapodaSustainable useFreshwater shrimps play an important role in many ecological processes since they are epibenthic detritivores but also prey on other invertebrates and are predated by fishes. The knowledge about their biology allow the development of management strategies to improve the use of natural resources by avoiding overfishing and enhancing productivity. Here we evaluated the population structure of the shrimp Macrobrachium amazonicum in the river Rio Grande, upstream of the Água Vermelha hydroelectric dam. They were captured monthly from October 2017 until March 2018, in six sites along the river. The first site was ∿1000 m distant from the dam and the sixth was ∿4000 m distant. A sac-like sieve and traps were used to capture the shrimps. The sieve was dragged three times for 180o. The traps were left by the river margins for six hours. In the laboratory, the shrimps were sexed and measured (carapace length; CL). In total, 6455 individuals were captured: 4499 females (294 breeding), 1445 males, and 217 juveniles. Female mean size was 7.50 ± 3.47 mm, male mean size was 7.44 ± 2.40 mm, and juvenile mean size was 3.24 ± 1.10 mm. The smallest individual was found in site III and it was a juvenile of 1.08 mm. The largest had 20 mm and was found in site II. The smallest breeding female had 3.8 mm CL. The largest individuals were more abundant in the sites near the dam, whereas the smallest were more abundant in the farthest sites. The highest abundance was seen in sites III and IV, and the lowest, in site VI. Unlike males and juveniles, females (both breeding and non-breeding) were more abundant (Anova, p < 0.01) near the dam. By knowing the population structure of M. amazonicum it is possible to understand how they are being affected by the environmental changes caused by the hydroelectric dam.Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)Instituto de Biociências Universidade Estadual Júlio de Mesquita Filho, Rua Prof. Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião JúniorUniversidade Federal do Triângulo MineiroUniversidade Estadual de MaringáInstituto de Biociências Universidade Estadual Júlio de Mesquita Filho, Rua Prof. Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião JúniorFAPEMIG: 31/2017 PROPPG/UFTMUniversidade Estadual Paulista (UNESP)Universidade Federal do Triângulo MineiroUniversidade Estadual de Maringá (UEM)Rodrigues, Larissa Rosa [UNESP]da Costa, Jaqueline Roberta PereiraPassafaro, Rafael Montinide Andrade, Luciana Segura2022-04-28T19:29:10Z2022-04-28T19:29:10Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-9http://dx.doi.org/10.4025/actascibiolsci.v42i2.48928Acta Scientiarum - Biological Sciences, v. 42, p. 1-9.1807-863X1679-9283http://hdl.handle.net/11449/22151210.4025/actascibiolsci.v42i2.489282-s2.0-85088166404Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengActa Scientiarum - Biological Sciencesinfo:eu-repo/semantics/openAccess2022-04-28T19:29:11Zoai:repositorio.unesp.br:11449/221512Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:37:09.507396Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? |
title |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? |
spellingShingle |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? Rodrigues, Larissa Rosa [UNESP] Crustacea Dams Decapoda Sustainable use |
title_short |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? |
title_full |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? |
title_fullStr |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? |
title_full_unstemmed |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? |
title_sort |
Do hydroelectric dams affect the abundance and population structure of freshwater shrimps? |
author |
Rodrigues, Larissa Rosa [UNESP] |
author_facet |
Rodrigues, Larissa Rosa [UNESP] da Costa, Jaqueline Roberta Pereira Passafaro, Rafael Montini de Andrade, Luciana Segura |
author_role |
author |
author2 |
da Costa, Jaqueline Roberta Pereira Passafaro, Rafael Montini de Andrade, Luciana Segura |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Federal do Triângulo Mineiro Universidade Estadual de Maringá (UEM) |
dc.contributor.author.fl_str_mv |
Rodrigues, Larissa Rosa [UNESP] da Costa, Jaqueline Roberta Pereira Passafaro, Rafael Montini de Andrade, Luciana Segura |
dc.subject.por.fl_str_mv |
Crustacea Dams Decapoda Sustainable use |
topic |
Crustacea Dams Decapoda Sustainable use |
description |
Freshwater shrimps play an important role in many ecological processes since they are epibenthic detritivores but also prey on other invertebrates and are predated by fishes. The knowledge about their biology allow the development of management strategies to improve the use of natural resources by avoiding overfishing and enhancing productivity. Here we evaluated the population structure of the shrimp Macrobrachium amazonicum in the river Rio Grande, upstream of the Água Vermelha hydroelectric dam. They were captured monthly from October 2017 until March 2018, in six sites along the river. The first site was ∿1000 m distant from the dam and the sixth was ∿4000 m distant. A sac-like sieve and traps were used to capture the shrimps. The sieve was dragged three times for 180o. The traps were left by the river margins for six hours. In the laboratory, the shrimps were sexed and measured (carapace length; CL). In total, 6455 individuals were captured: 4499 females (294 breeding), 1445 males, and 217 juveniles. Female mean size was 7.50 ± 3.47 mm, male mean size was 7.44 ± 2.40 mm, and juvenile mean size was 3.24 ± 1.10 mm. The smallest individual was found in site III and it was a juvenile of 1.08 mm. The largest had 20 mm and was found in site II. The smallest breeding female had 3.8 mm CL. The largest individuals were more abundant in the sites near the dam, whereas the smallest were more abundant in the farthest sites. The highest abundance was seen in sites III and IV, and the lowest, in site VI. Unlike males and juveniles, females (both breeding and non-breeding) were more abundant (Anova, p < 0.01) near the dam. By knowing the population structure of M. amazonicum it is possible to understand how they are being affected by the environmental changes caused by the hydroelectric dam. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2022-04-28T19:29:10Z 2022-04-28T19:29:10Z |
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/10.4025/actascibiolsci.v42i2.48928 Acta Scientiarum - Biological Sciences, v. 42, p. 1-9. 1807-863X 1679-9283 http://hdl.handle.net/11449/221512 10.4025/actascibiolsci.v42i2.48928 2-s2.0-85088166404 |
url |
http://dx.doi.org/10.4025/actascibiolsci.v42i2.48928 http://hdl.handle.net/11449/221512 |
identifier_str_mv |
Acta Scientiarum - Biological Sciences, v. 42, p. 1-9. 1807-863X 1679-9283 10.4025/actascibiolsci.v42i2.48928 2-s2.0-85088166404 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Acta Scientiarum - Biological Sciences |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-9 |
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 |
|
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1808128955620786176 |