Reproductive biology of the dusky grouper Epinephelus marginatus (Lowe, 1834)

Brazilian Archives of Biology and Technology

Áthila Bertoncini Andrade¹  Leonardo Francisco Machado¹  Maurício Hostim-silva¹  João Pedro Barreiros² 

[1] ,Universidade do Vale do Itajaí Centro de Ensino Superior de Ciências Tecnológicas da Terra e do Mar Itajaí SC ,Brazil

关键词: Reproduction;    Dusky Grouper;    Epinephelus marginatus;    Santa Catarina;    Brazil;   

DOI  :  10.1590/S1516-89132003000300009

来源: SciELO

【 摘 要 】

Investigations were carried out about the reproductive biology of the dusky grouper, Epinephelus marginatus (Lowe, 1834) a serranid protogynous hermaphrodite fish inhabitant of rocky bottoms from shallow waters up to 200 m depth. Samples were caught in the islands that form Arvoredo Biological Marine Reserve (SC - Brazil) and the coastal islands near Florianópolis region from March 1998 to May 2000. Data from samples of juvenile groupers on intertidal pools were used to link their occurrence in the pools to the post-spawning season. To describe the histological changes on gonads along the reproductive cycle and to establish maturation scales, 109 groupers were histologically tested for sex determination. First maturation size was determined for females (L50=470 mm; r²=0.99). The results of calculated gonadosomatic (GSI) and hepatosomatic (HSI) indexes, showed that maturation occurred along the spring months and the spawning activity during the summer with a peak in December. Liver recovery (HSI elevation) was evident in the autumn, was the post spawning season. The relationship between length and weight was W = 9 · 10-6 · TL3.1149 (r²=0.998; n=246).

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