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Stratégie d'occupation de la mangrove de la baie de Guaratuba (Brésil) par le Sciaenidae prédateur Isopisthus parvipinnis (Teleostei, Pisces) = Migration strategy of a predatory sciaenid Isopisthys parvipinnis (Teleostei, Pisces) in the mangrove of the Bay of Guaratuba (Brazil)
Chaves de Tarso, P.; Rickli, A.; Bouchereau, J.-L. (1998). Stratégie d'occupation de la mangrove de la baie de Guaratuba (Brésil) par le Sciaenidae prédateur Isopisthus parvipinnis (Teleostei, Pisces) = Migration strategy of a predatory sciaenid Isopisthys parvipinnis (Teleostei, Pisces) in the mangrove of the Bay of Guaratuba (Brazil). Cah. Biol. Mar. 39(1): 63-71
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Chaves de Tarso, P.
  • Rickli, A.
  • Bouchereau, J.-L.

Abstract
    Observations have been performed from September 1993 of February 1997, on the abundance, biometry, diet, reproduction and behaviour of the population of Isopisthus parvipinnis from the mangrove of Guaratuba Bay, Brazil. During spring and summer, individuals sporadically transit to the most opened areas of the Bay and feed on fish and crustaceans. During this period the species reproduces, and spawning occurs either in this mangrove or in the open sea. During autumn and winter, an important part of the population of I. parvipinnis enters into channels and pools and its diet changes to become entirely based on fish. This is associated with the general increase of fish abundance at that time in the mangrove. Growth is allometric and relations between mass (M) and length (L) are: M=1,5922.10 super(-7)L super(3,819) (males), M=5,2844.10 super(-8)L super(4,01) (females) et M=1,2331.10 super(-7)L super(3,852) (both sexes). The strategy of occupation of the mangrove ecosystem and the ichtyophage behaviour characterize I. parvipinnis as an opportunist predator species playing, with respect to the mangrove, a part in energy export towards others areas of the Bay and the marine adjacent region.

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