The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925)
The influence of the 1992-1993 El Niño events on the reproductive behavior of the Scomber japonicus peruanus (Chub mackerel) was studied from samples collected monthly, along the Peruvian coast (3º23'S-14º00'S), from January 1990 to December 1993. The monthly variation of the gonadosomatic...
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2009-12-01
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doaj-44444927971a45d29a71c30e359d96492020-11-25T01:12:15ZengUniversidade de São PauloBrazilian Journal of Oceanography 1679-87591982-436X2009-12-0157426327210.1590/S1679-87592009000400002The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925)Hilda Caramantin-SorianoLuz Amelia Vega-PérezMiguel ÑiquenThe influence of the 1992-1993 El Niño events on the reproductive behavior of the Scomber japonicus peruanus (Chub mackerel) was studied from samples collected monthly, along the Peruvian coast (3º23'S-14º00'S), from January 1990 to December 1993. The monthly variation of the gonadosomatic index and the frequency of the periods of gonad maturation evidenced that the spawning of the species occurred all year long, being more intense in summer. The values of the gonadosomatic index were higher during the occurrence of the 1992-1993 El Niño, while the body weight and gonad weight decreased. Regarding the condition factor, its values decreased in females over 35 cm in fork length.<br>A influência do evento El Niño 1992-1993 no comportamento reprodutivo de Scomber japonicus peruanus (cavalinha) foi estudada a partir de amostras coletadas mensalmente, ao longo do litoral peruano (3º23'S-14º00'S), de janeiro de 1990 a dezembro de 1993. A variação mensal do índice gonadossomático e a freqüência dos estágios de maturação gonadal evidenciaram que a desova da cavalinha ocorreu o ano inteiro, sendo mais intensa no verão. Os valores do índice gonadossomático foram mais elevados durante o evento El Niño, mas, em contraposição, as fêmeas apresentaram peso menor. Os dados mostraram que o fator de condição diminuiu em fêmeas com mais de 35 cm de comprimento furcal.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592009000400002Scomber japonicus peruanusMaturação gonadalÍndice gonadossomáticoFator de condiçãoEl NiñoPacífico SulScomber japonicus peruanusGonadal maturationGonadosomatic indexCondition factorEl Niño eventSouth Pacific |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hilda Caramantin-Soriano Luz Amelia Vega-Pérez Miguel Ñiquen |
spellingShingle |
Hilda Caramantin-Soriano Luz Amelia Vega-Pérez Miguel Ñiquen The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925) Brazilian Journal of Oceanography Scomber japonicus peruanus Maturação gonadal Índice gonadossomático Fator de condição El Niño Pacífico Sul Scomber japonicus peruanus Gonadal maturation Gonadosomatic index Condition factor El Niño event South Pacific |
author_facet |
Hilda Caramantin-Soriano Luz Amelia Vega-Pérez Miguel Ñiquen |
author_sort |
Hilda Caramantin-Soriano |
title |
The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925) |
title_short |
The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925) |
title_full |
The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925) |
title_fullStr |
The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925) |
title_full_unstemmed |
The influence of the 1992-1993 el niño on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925) |
title_sort |
influence of the 1992-1993 el niño on the reproductive biology of scomber japonicus peruanus (jordán & hubb, 1925) |
publisher |
Universidade de São Paulo |
series |
Brazilian Journal of Oceanography |
issn |
1679-8759 1982-436X |
publishDate |
2009-12-01 |
description |
The influence of the 1992-1993 El Niño events on the reproductive behavior of the Scomber japonicus peruanus (Chub mackerel) was studied from samples collected monthly, along the Peruvian coast (3º23'S-14º00'S), from January 1990 to December 1993. The monthly variation of the gonadosomatic index and the frequency of the periods of gonad maturation evidenced that the spawning of the species occurred all year long, being more intense in summer. The values of the gonadosomatic index were higher during the occurrence of the 1992-1993 El Niño, while the body weight and gonad weight decreased. Regarding the condition factor, its values decreased in females over 35 cm in fork length.<br>A influência do evento El Niño 1992-1993 no comportamento reprodutivo de Scomber japonicus peruanus (cavalinha) foi estudada a partir de amostras coletadas mensalmente, ao longo do litoral peruano (3º23'S-14º00'S), de janeiro de 1990 a dezembro de 1993. A variação mensal do índice gonadossomático e a freqüência dos estágios de maturação gonadal evidenciaram que a desova da cavalinha ocorreu o ano inteiro, sendo mais intensa no verão. Os valores do índice gonadossomático foram mais elevados durante o evento El Niño, mas, em contraposição, as fêmeas apresentaram peso menor. Os dados mostraram que o fator de condição diminuiu em fêmeas com mais de 35 cm de comprimento furcal. |
topic |
Scomber japonicus peruanus Maturação gonadal Índice gonadossomático Fator de condição El Niño Pacífico Sul Scomber japonicus peruanus Gonadal maturation Gonadosomatic index Condition factor El Niño event South Pacific |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592009000400002 |
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