biologia reprodutiva de micropogonias furnieri (desmarest, 1823) (teleostei, sciaenidae): 1. fator de condição como indicador do período de desova the reproductive biology of micropogonias furnieri (desmarest, 1823) (teleostei, sciaenidae): 1. condition factor as an indicator of spawning period

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ID: 201812
1983
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Abstract
A analise temporal da freqüência de estádios de maturação de 102 fêmeas adultas coletadas entre fevereiro de 1979 e janeiro de 1980 na região de Ubatuba, litoral norte do Estado de São Paulo, mostra que M. funieri, nessa área, apresenta três desovas durante o ano: uma no outono (abril-junho), outra no inverno (agosto-setembro) e uma terceira na primavera-verão (novembro-fevereiro). Essa sugestão e reforçada pelas flutuações de K (fator de condição considerando-se o peso das gonadas) e K' (sem considerar o peso das gonadas), durante um ciclo reprodutivo. Os valores máximos de K e K' coincidem com os picos de ocorrencia de indivíduos com gonadas maturas (C) e, os mínimos, com os de indivíduos com gonadas esvaziadas (D), A diferença entre K e K' (AR) estima a "condição da gonada" apresentando seus máximos nos períodos de mais intensa atividade dos ovários, contituindo-se, assim, o valor de AK em um índice indireto de maturidade e dos períodos de desova de M. funieri.
The monthly analysis of maturity stage frequency of adult females caught monthly at the Ubatvíba region, SP, from February 1979 to January 1980, suggests that M. funieri spaws three times ayear: Autumn (April-June) , Winter (August-Sept ember) and Spring-Summer (November-February). Condition factor fluctuations estimated with andwithout gonads K and K') during a reproductive cycle reinforces hypothesis0 K and K' maximum values relate precisely with higher frequency periods of a females at advanced stages of maturity (C). On the other hand, K and K' minimum values are concomitant with higher frequency periods of spent females (D). Although K and K' have a similar evolution, there are some periods in which ΔK (K-K') appears higher: May, August-September and November. These periods are also related to the maximum frequency of females in stage C. As AX estimes the "gonad condition", establishing the periods when the gonad attains the maximum weight in relation to body weight, and so the more advances of maturity stages, it can be used as a maturity and breeding season index.
Reference Key
isaac-nahum1983brazilianbiologia Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Victoria Judith Isaac-Nahum;Anna Emília Amato de Morais Vazzoler
Journal Journal of genetic counseling
Year 1983
DOI
10.1590/S1679-87591983000100006
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87591983000100006
Keywords
condition factor spawning seasonsoceanography

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