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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Main Authors: Hilda Caramantin-Soriano, Luz Amelia Vega-Pérez, Miguel Ñiquen
Format: Article
Language:English
Published: Universidade de São Paulo 2009-12-01
Series:Brazilian Journal of Oceanography
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592009000400002
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spelling 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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