Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2013 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da FURG (RI FURG) |
Texto Completo: | http://repositorio.furg.br/handle/1/5702 |
Resumo: | We evaluated the population dynamics of Acetes americanus Ortmann, 1893 focusing on sex ratio, individual growth, longevity, and the juvenile recruitment period. Samples were collected monthly from January 2006 to June 2007 in the bay of Ubatuba, Brazil. Specimen growth was identified for each gender, and the chosen cohorts were fitted in a von Bertalanffy Growth Model (VBGM); longevity was estimated by the von Bertalanffy inverse equation, considering 99% of the asymptotic length. A total of 6881 individuals (2343 males and 4538 females) were captured. On average the body size (total length) was greater in females (14.64 ± 3.34 mm) than in males (12.27 ± 1.86 mm). The mean growth curves (obtained by grouping the cohorts for each sex), provided estimates of TL∞ = 19.33 mm, k = 0.02 and t0 = −0.12 days for females and TL∞ = 15.13 mm, k = 0.03 and t0 = −0.07 days for males, where TL∞ is the asymptotic length, k is coefficient of growth and t0 is the theorical age when the size is equal to 0. Longevity was estimated at 0.61 years for females and 0.50 years for males. The sex ratio tended to favor females, which corroborates with others studies of sergestids. Our finding that males of A. americanus have higher values of k and therefore achieve a smaller size relative to females has been observed in other penaeids. We concluded that this differential growth pattern between the sexes is found across Dendrobranchiata. The life cycles of penaeids have an average duration of approximately 1-2 years, but our results corroborate other studies that estimate a shorter longevity for Acetes, as species of this genus are typically smaller in size. We found continuous recruitment with two main peaks observed during the study period, corroborating previous studies of Acetes |
id |
FURG_f7174efa3eda8376c30cc1908e74e102 |
---|---|
oai_identifier_str |
oai:repositorio.furg.br:1/5702 |
network_acronym_str |
FURG |
network_name_str |
Repositório Institucional da FURG (RI FURG) |
repository_id_str |
|
spelling |
Simões, Sabrina MorilhasD'Incao, FernandoFransozo, AdilsonCastilho, Antonio LeãoCosta, Rogério Caetano da2015-12-24T14:08:49Z2015-12-24T14:08:49Z2013SIMÕES, Sabrina Morilhas et al. Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil. Journal of Crustacean Biology, v. 33, n. 1, p. 1-9, 2013. Disponível em: <http://booksandjournals.brillonline.com/content/journals/10.1163/1937240x-00002108>. Acesso em: 14 nov. 2015.0278-0372http://repositorio.furg.br/handle/1/570210.1163/1937240X-00002108We evaluated the population dynamics of Acetes americanus Ortmann, 1893 focusing on sex ratio, individual growth, longevity, and the juvenile recruitment period. Samples were collected monthly from January 2006 to June 2007 in the bay of Ubatuba, Brazil. Specimen growth was identified for each gender, and the chosen cohorts were fitted in a von Bertalanffy Growth Model (VBGM); longevity was estimated by the von Bertalanffy inverse equation, considering 99% of the asymptotic length. A total of 6881 individuals (2343 males and 4538 females) were captured. On average the body size (total length) was greater in females (14.64 ± 3.34 mm) than in males (12.27 ± 1.86 mm). The mean growth curves (obtained by grouping the cohorts for each sex), provided estimates of TL∞ = 19.33 mm, k = 0.02 and t0 = −0.12 days for females and TL∞ = 15.13 mm, k = 0.03 and t0 = −0.07 days for males, where TL∞ is the asymptotic length, k is coefficient of growth and t0 is the theorical age when the size is equal to 0. Longevity was estimated at 0.61 years for females and 0.50 years for males. The sex ratio tended to favor females, which corroborates with others studies of sergestids. Our finding that males of A. americanus have higher values of k and therefore achieve a smaller size relative to females has been observed in other penaeids. We concluded that this differential growth pattern between the sexes is found across Dendrobranchiata. The life cycles of penaeids have an average duration of approximately 1-2 years, but our results corroborate other studies that estimate a shorter longevity for Acetes, as species of this genus are typically smaller in size. We found continuous recruitment with two main peaks observed during the study period, corroborating previous studies of AcetesengAcetes americanusDendrobranchiataLongevityPopulation dynamicsSergestidaeSex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURGORIGINALSEX RATIO, GROWTH AND RECRUITMENT OF THE PELAGIC.pdfSEX RATIO, GROWTH AND RECRUITMENT OF THE PELAGIC.pdfapplication/pdf632011https://repositorio.furg.br/bitstream/1/5702/1/SEX%20RATIO%2c%20GROWTH%20AND%20RECRUITMENT%20OF%20THE%20PELAGIC.pdfc62013a6218511d2ccaf1a6c9536f915MD51open accessLICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.furg.br/bitstream/1/5702/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52open access1/57022020-01-06 14:56:39.116open accessoai:repositorio.furg.br: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Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2020-01-06T17:56:39Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false |
dc.title.pt_BR.fl_str_mv |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil |
title |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil |
spellingShingle |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil Simões, Sabrina Morilhas Acetes americanus Dendrobranchiata Longevity Population dynamics Sergestidae |
title_short |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil |
title_full |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil |
title_fullStr |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil |
title_full_unstemmed |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil |
title_sort |
Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil |
author |
Simões, Sabrina Morilhas |
author_facet |
Simões, Sabrina Morilhas D'Incao, Fernando Fransozo, Adilson Castilho, Antonio Leão Costa, Rogério Caetano da |
author_role |
author |
author2 |
D'Incao, Fernando Fransozo, Adilson Castilho, Antonio Leão Costa, Rogério Caetano da |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Simões, Sabrina Morilhas D'Incao, Fernando Fransozo, Adilson Castilho, Antonio Leão Costa, Rogério Caetano da |
dc.subject.por.fl_str_mv |
Acetes americanus Dendrobranchiata Longevity Population dynamics Sergestidae |
topic |
Acetes americanus Dendrobranchiata Longevity Population dynamics Sergestidae |
description |
We evaluated the population dynamics of Acetes americanus Ortmann, 1893 focusing on sex ratio, individual growth, longevity, and the juvenile recruitment period. Samples were collected monthly from January 2006 to June 2007 in the bay of Ubatuba, Brazil. Specimen growth was identified for each gender, and the chosen cohorts were fitted in a von Bertalanffy Growth Model (VBGM); longevity was estimated by the von Bertalanffy inverse equation, considering 99% of the asymptotic length. A total of 6881 individuals (2343 males and 4538 females) were captured. On average the body size (total length) was greater in females (14.64 ± 3.34 mm) than in males (12.27 ± 1.86 mm). The mean growth curves (obtained by grouping the cohorts for each sex), provided estimates of TL∞ = 19.33 mm, k = 0.02 and t0 = −0.12 days for females and TL∞ = 15.13 mm, k = 0.03 and t0 = −0.07 days for males, where TL∞ is the asymptotic length, k is coefficient of growth and t0 is the theorical age when the size is equal to 0. Longevity was estimated at 0.61 years for females and 0.50 years for males. The sex ratio tended to favor females, which corroborates with others studies of sergestids. Our finding that males of A. americanus have higher values of k and therefore achieve a smaller size relative to females has been observed in other penaeids. We concluded that this differential growth pattern between the sexes is found across Dendrobranchiata. The life cycles of penaeids have an average duration of approximately 1-2 years, but our results corroborate other studies that estimate a shorter longevity for Acetes, as species of this genus are typically smaller in size. We found continuous recruitment with two main peaks observed during the study period, corroborating previous studies of Acetes |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013 |
dc.date.accessioned.fl_str_mv |
2015-12-24T14:08:49Z |
dc.date.available.fl_str_mv |
2015-12-24T14:08:49Z |
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.citation.fl_str_mv |
SIMÕES, Sabrina Morilhas et al. Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil. Journal of Crustacean Biology, v. 33, n. 1, p. 1-9, 2013. Disponível em: <http://booksandjournals.brillonline.com/content/journals/10.1163/1937240x-00002108>. Acesso em: 14 nov. 2015. |
dc.identifier.uri.fl_str_mv |
http://repositorio.furg.br/handle/1/5702 |
dc.identifier.issn.none.fl_str_mv |
0278-0372 |
dc.identifier.doi.pt_BR.fl_str_mv |
10.1163/1937240X-00002108 |
identifier_str_mv |
SIMÕES, Sabrina Morilhas et al. Sex ratio, growth and recruitment of the pelagic shrimp Acetes americanus on the southeastern coast of Brazil. Journal of Crustacean Biology, v. 33, n. 1, p. 1-9, 2013. Disponível em: <http://booksandjournals.brillonline.com/content/journals/10.1163/1937240x-00002108>. Acesso em: 14 nov. 2015. 0278-0372 10.1163/1937240X-00002108 |
url |
http://repositorio.furg.br/handle/1/5702 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da FURG (RI FURG) instname:Universidade Federal do Rio Grande (FURG) instacron:FURG |
instname_str |
Universidade Federal do Rio Grande (FURG) |
instacron_str |
FURG |
institution |
FURG |
reponame_str |
Repositório Institucional da FURG (RI FURG) |
collection |
Repositório Institucional da FURG (RI FURG) |
bitstream.url.fl_str_mv |
https://repositorio.furg.br/bitstream/1/5702/1/SEX%20RATIO%2c%20GROWTH%20AND%20RECRUITMENT%20OF%20THE%20PELAGIC.pdf https://repositorio.furg.br/bitstream/1/5702/2/license.txt |
bitstream.checksum.fl_str_mv |
c62013a6218511d2ccaf1a6c9536f915 8a4605be74aa9ea9d79846c1fba20a33 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG) |
repository.mail.fl_str_mv |
|
_version_ |
1798313590128640000 |