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Brazilian sardine (Sardinella brasiliensis) spawning in the southeast Brazilian Bight over the period 1976-1993

Abstracts

Based on sampling over the period 1976-1993 in the southeast Brazilian Bight, the distribution of spawning of the Brazilian sardine (Sardinella brasi/iensis) is described in relation to environmental conditions. The area of intense spawning occurs in the southern part of the bight where coastal upwelling was less /Tequent. Spawning intensity showed high interannllal variation and the egg abundance in the survey area ranged /Tom 99 billion eggs in the January 1988 cruise to 4669 billion eggs in the January 1981 cruise. Peak spawning takes place one hour after midnight and eggs hatch . out within 19 hours with a water temperature of 24 °e.

Brazilian sardine; Spawning area; Southeast Brazilian Bight


Baseado nos dados coletados durante nove cruzeiros oceanográficos realizados na região sudeste, as áreas de desova da sardinha-verdadeira (Sardinella brasiliensis) foram apresentadas c discutidas em relação às condições oceanográficas. As áreas de desova intensiva foram localizadas na parte sul da área de investigação, onde a ressurgência costeira foi menos freqüente. A intensidade de desova demonstrou uma variação anual relativamente grande. A produção total de ovos da sardinha- verdadeira variou de 99 bilhões de ovos durante o cruzeiro de janeiro de 1988 para 4669 bilhões de ovos em janeiro de 1981. O pico de desova ocorre na camada de mistura de superfície uma hora após a meia noite e os ovos eclodem em 19 horas com a temperatura de água 24 °e.

Sardinha-verdadeira; Área de desova; Região sudeste


RESEARCH ARTICLES

Brazilian sardine (Sardinella brasiliensis) spawning in the southeast Brazilian Bight over the period 1976-1993

Yasunobu Matsuura

Instituto Oceanográfico da Universidade de São Paulo (Caixa Postal 66149, 05315-970 São Paulo, SP, Brasil)

ABSTRACT

Based on sampling over the period 1976-1993 in the southeast Brazilian Bight, the distribution of spawning of the Brazilian sardine (Sardinella brasi/iensis) is described in relation to environmental conditions. The area of intense spawning occurs in the southern part of the bight where coastal upwelling was less /Tequent. Spawning intensity showed high interannllal variation and the egg abundance in the survey area ranged /Tom 99 billion eggs in the January 1988 cruise to 4669 billion eggs in the January 1981 cruise. Peak spawning takes place one hour after midnight and eggs hatch . out within 19 hours with a water temperature of 24°e.

Descriptors: Brazilian sardine. Spawning area, Southeast Brazilian Bight.

RESUMO

Baseado nos dados coletados durante nove cruzeiros oceanográficos realizados na região sudeste, as áreas de desova da sardinha-verdadeira (Sardinella brasiliensis) foram apresentadas c discutidas em relação às condições oceanográficas. As áreas de desova intensiva foram localizadas na parte sul da área de investigação, onde a ressurgência costeira foi menos freqüente. A intensidade de desova demonstrou uma variação anual relativamente grande. A produção total de ovos da sardinha- ­verdadeira variou de 99 bilhões de ovos durante o cruzeiro de janeiro de 1988 para 4669 bilhões de ovos em janeiro de 1981. O pico de desova ocorre na camada de mistura de superfície uma hora após a meia noite e os ovos eclodem em 19 horas com a temperatura de água 24 °e.

Descriptores: Sardinha-verdadeira. Área de desova, Região sudeste.

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Acknowledgements

The author wishes to thank Dr. Alec D. MacCall of the Southwest Fisheries Science Center for the revision and critical reading of the manuscript. I also thank the captain W.C. Freitas and crew of the R/V "Prof. W Besnard" for their cooperation during survey cruises. The present investigation received the financial support of the CIRM, F APESP and CNJPq. The author received a research fellowship of the CNPq (process no. 301675/82) during investigation. This is a product of the SCOR Working Group 98. Two anonymous reviewers are thanked for their useful comments and suggestions.

(Manuscript received 27 October 1997; revised 12 February 1998; accepted 08 April 1998)

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Publication Dates

  • Publication in this collection
    22 Apr 2013
  • Date of issue
    1998

History

  • Accepted
    08 Apr 1998
  • Reviewed
    12 Feb 1998
  • Received
    27 Oct 1997
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