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标题：Population biology of Stellifer rastrifer, S. brasiliensis and S. stellifer in Caraguatatuba Bay, northern coast of São Paulo, Brazil
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作者：Pombo, Maíra ; Denadai, Marcia Regina ; Turra, Alexander 等
期刊名称：Brazilian Journal of Oceanography
印刷版ISSN：1679-8759
电子版ISSN：1982-436X
出版年度：2012
卷号：60
期号：3
页码：271-282
DOI：10.1590/S1679-87592012000300001
出版社：Instituto Oceanográfico da Universidade de São Paulo
摘要：Ecosystems may reflect environmental changes in many respects, from the debilitation of individuals to alterations in community composition.Equally, population parameters may provide reliable indications of environmental changes.Members of the sciaenid fish genus Stellifer are usually very abundant where they occur, often with two or more species living in sympatry.Here, the population dynamics of three Stellifer species from southeastern Brazil were assessed.Sampling was carried out in shallow marine areas of Caraguatatuba Bay, from August 2003 to October 2004.The species evaluated were Stellifer rastrifer (n=3183), S.brasiliensis (n=357) and S.stellifer (n=116).The area under greater continental influence tended to support more, but smaller individuals.Size variations over time were similar among species and negatively correlated with Krel, which showed smooth fluctuations.The general length-frequency distribution was concentrated between 6.0 and 9.0 cm, and the great majority of females did not present mature gonads during the sampling period.The findings support the existence of a stratification by size for these species, indicating that the area is essential for the development of younger fish.Failure to consider these characteristics for the management of similar areas may have serious implications for these environments.
关键词：Stellifer;espécies simpátricas;plataforma continental rasa;distribuição espaço-temporal;caracterização sexual;relação peso-comprimento
其他关键词：Stellifer;sympatric species;shallow continental shelf waters;spatio-temporal distribution;sexual characterization;weight-length relationship