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Título : Closely Related Fishes Inhabiting Different Ecosystems Exhibit the Same Oocyte Production and Recruitment Pattern
Autor : Costa, Eudriano F. S.; Dias, June F.; Murua, Hilario
Citación : BIOLOGICAL BULLETIN, 2016, 230, 96-109
Resumen : Information on oocyte production and recruitment in phylogenetically related species can help in understanding the evolution of reproductive life-history traits in fish of indeterminate fecundity. The present study compared, for the first time, oocyte production and recruitment patterns between two closely related species: Stellifer brasiliensis and Stellifer rastrifer (Perciformes, Sciaenidae), in the southwestern Atlantic, Brazil. Specimens of S. brasiliensis were sampled from the coastal waters of Ubatuba, and samples of S. rastrifer were taken from the Cananeia Lagoon Estuarine System. Ovaries were investigated using histology and model-based stereology. The total number of oocytes per individual (N) and stage-specific oocyte packing density did not differ significantly between S. brasiliensis and S. rastrifer. The number of pre-vitellogenic and vitellogenic oocytes were positively correlated with female total weight and length, and ovary weight in both species. Analysis of oocyte recruitment across their development stages revealed that approximately 5.9\% of the standing stock oocytes larger than 50 mu m in S. brasiliensis and 5.0\% in S. rastrifer were recruited to form the next batches. Females of S. brasiliensis and S. rastrifer, in spawning-capable phase, exhibit the same oocyte production and recruitment patterns, showing no influences of the ecosystems on primary and secondary oocyte production.
Palabras clave : STELLIFER-RASTRIFER; STEREOLOGICAL METHODS; ESTUARINE SYSTEM; BRAZILIAN COAST; BLUEFIN TUNA; SAO-PAULO; FECUNDITY; SCIAENIDAE; GROWTH; BRASILIENSIS
Fecha de publicación : 2016
Editorial : UNIV CHICAGO PRESS
Tipo de documento: Article
Idioma: Inglés
DOI: 10.1086/BBLv230n2p96
URI : http://dspace.azti.es/handle/24689/155
ISSN : 0006-3185
E-ISSN: 1939-8697
Patrocinador: Post-graduate Program in Oceanography/CAPES \[7546/13-0]
Aparece en las tipos de publicación: Artículos científicos



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