Biology of Chirocentrodon bleekerianus (Poey, 1867) (Clupeiformes: Pristigasteridae) in a continental shelf region of southern Brazil

Brazilian Archives of Biology and Technology

Carlos Eduardo Corrêa²  Paulo De Tarso Chaves¹  Paulo Ricardo Bittencourt Guimarães¹ 

[1] ,UNICENTRO Departamento de Engenharia Florestal Irati PR ,Brazil

关键词: Abundance;    Brazil;    Chirocentrodon;    Clupeiforms;    feeding;    reproduction;   

DOI  :  10.1590/S1516-89132005000300013

来源: SciELO

【 摘 要 】

This study provides information on the biology of C. bleekerianus from Paraná State coast, Brazil, assembling data about its abundance, size structure, diet and reproduction. Monthly collections were accomplished in 1999 and 2000 in the internal continental shelf, with trawl net. The catch-per-unit-effort did not vary significantly among the seasons. In the summer, the individuals were larger, followed by autumn, spring and winter. C. bleekerianus was predominantly planktivorous and the most frequent items in its diet were copepods followed by diatomaceous algae. Seasonal variation in the frequency values of the gonad maturation stages, gonadossomatic index and gonadal condition factor indicated that the reproductive period encompassed spring and summer. The mean total length at first maturity of females was estimated to be 76 mm.

【 授权许可】

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