Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil

SANTOS, Nayara Barbosa; ROCHA, Rossineide Martins da; FRÉDOU, Flávia Lucena

Artigo

Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil

Plagioscion magdalenae (pacora) is a commercially important benthopelagic sciaenid and widely distributed in the Amazon River basin. The present study describes the reproductive biology of this species in the bay of Marajo, Amazon Estuary, Brazil. The gonadal development stage, age and size at first...

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Autor principal:	SANTOS, Nayara Barbosa
Outros Autores:	ROCHA, Rossineide Martins da, FRÉDOU, Flávia Lucena
Grau:	Artigo
Idioma:	eng
Publicado em:	2013
Assuntos:	Peixe Reprodução (Biologia) Reprodução animal Pescada curuca Desenvolvimento gonadal Baía de Marajó - PA Pará - Estado Amazônia brasileira
Acesso em linha:	http://repositorio.ufpa.br/jspui/handle/2011/3845

id	ir-2011-3845
recordtype	dspace
spelling	ir-2011-38452019-05-22T12:32:00Z Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil SANTOS, Nayara Barbosa ROCHA, Rossineide Martins da FRÉDOU, Flávia Lucena Peixe Reprodução (Biologia) Reprodução animal Pescada curuca Desenvolvimento gonadal Baía de Marajó - PA Pará - Estado Amazônia brasileira Plagioscion magdalenae (pacora) is a commercially important benthopelagic sciaenid and widely distributed in the Amazon River basin. The present study describes the reproductive biology of this species in the bay of Marajo, Amazon Estuary, Brazil. The gonadal development stage, age and size at first sexual maturity (L50), sex ratio, and reproductive strategy were determined. The data were collected bi-monthly from December 2005 to October 2006. A total of 251 specimens were examined, with the total length (TL) ranging between 220 and 590 mm. The weight-length relationship for females, males and grouped sexes was highly significant, showing a positive allometry. The L50 was of 279 mm for grouped sexes, with 305 mm and 269 mm TL for females and males respectively. The sex ratio for the total number of individuals favored the males (2.02 males: 1 female). Macroscopically, the gonads were classified as immature, maturing, mature and spent. Considering the macro and microscopic evaluation of the gonads, an extended spawning period, mainly in August to February, was observed Plagioscion magdalenae (pescada-curuca) é um sciaenídeo bentopelágico, de importância comercial, amplamente distribuído na bacia do rio Amazonas. O objetivo deste trabalho foi descrever a biologia reprodutiva dessa espécie na baía do Marajó, estuário Amazônico, Brasil. Neste estudo foi determinado o estádio do desenvolvimento gonadal, tamanho de primeira maturação gonadal (L50), proporção entre sexos, época e o tipo de desova. A coleta foi realizada bimestralmente no período de dezembro de 2005 a outubro de 2006. Foi examinado um total de 251 exemplares, variando entre 220 e 590 mm de comprimento total (CT). A relação peso-comprimento para fêmeas, machos e sexos agrupados foi altamente significativa, com alometria positiva. O L50 foi de 279 mm considerando sexos agrupados, 305 e 269 mm CT para fêmeas e machos respectivamente. A proporção entre sexos para o total de indivíduos foi favorável aos machos (2,02 machos: 1 fêmea). Macroscopicamente, as gônadas foram classificadas em imatura, em maturação, matura e desovada. Considerando-se as avaliações macro e microscópicas das gônadas, foi registrado um período prolongado de desova, principalmente entre agosto e fevereiro. 2013-05-16T13:16:43Z 2013-05-16T13:16:43Z 2010 Artigo de Periódico SANTOS, Nayara Barbosa; ROCHA, Rossineide Martins da; FREDOU, Flávia Lucena. Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil. Neotropical Ichthyology, Porto Alegre, v. 8, n. 2, p. 333-340, 2010. Disponível em: <http://www.scielo.br/pdf/ni/v8n2/v8n2a12.pdf>. Acesso em: 13 maio 2013. <http://dx.doi.org/10.1590/S1679-62252010000200012>. 1982-0224 1679-6225 http://repositorio.ufpa.br/jspui/handle/2011/3845 eng Acesso Aberto application/pdf
institution	Repositório Institucional - Universidade Federal do Pará
collection	RI-UFPA
language	eng
topic	Peixe Reprodução (Biologia) Reprodução animal Pescada curuca Desenvolvimento gonadal Baía de Marajó - PA Pará - Estado Amazônia brasileira
spellingShingle	Peixe Reprodução (Biologia) Reprodução animal Pescada curuca Desenvolvimento gonadal Baía de Marajó - PA Pará - Estado Amazônia brasileira SANTOS, Nayara Barbosa Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
topic_facet	Peixe Reprodução (Biologia) Reprodução animal Pescada curuca Desenvolvimento gonadal Baía de Marajó - PA Pará - Estado Amazônia brasileira
description	Plagioscion magdalenae (pacora) is a commercially important benthopelagic sciaenid and widely distributed in the Amazon River basin. The present study describes the reproductive biology of this species in the bay of Marajo, Amazon Estuary, Brazil. The gonadal development stage, age and size at first sexual maturity (L50), sex ratio, and reproductive strategy were determined. The data were collected bi-monthly from December 2005 to October 2006. A total of 251 specimens were examined, with the total length (TL) ranging between 220 and 590 mm. The weight-length relationship for females, males and grouped sexes was highly significant, showing a positive allometry. The L50 was of 279 mm for grouped sexes, with 305 mm and 269 mm TL for females and males respectively. The sex ratio for the total number of individuals favored the males (2.02 males: 1 female). Macroscopically, the gonads were classified as immature, maturing, mature and spent. Considering the macro and microscopic evaluation of the gonads, an extended spawning period, mainly in August to February, was observed
format	Artigo
author	SANTOS, Nayara Barbosa
author2	ROCHA, Rossineide Martins da FRÉDOU, Flávia Lucena
author2Str	ROCHA, Rossineide Martins da FRÉDOU, Flávia Lucena
title	Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
title_short	Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
title_full	Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
title_fullStr	Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
title_full_unstemmed	Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
title_sort	reproductive biology of plagioscion magdalenae (teleostei: sciaenidae) (steindachner, 1878) in the bay of marajo, amazon estuary, brazil
publishDate	2013
url	http://repositorio.ufpa.br/jspui/handle/2011/3845
_version_	1787148002362654720
score	11.653393

Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil

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