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Reproduction in anadara tuberculosa pelecypoda aricadae in punta morales puntarenas costa rica



Reproduction in anadara tuberculosa pelecypoda aricadae in punta morales puntarenas costa rica



Revista de Biologia Tropical 32(1): 45-50



The reproductive cycle of 1094 specimens of the mangrove cockle, A. tuberculosa, was studied by a smear method and macroscopic observation of the gonads at Punta Morales, Costa Rica from May 1980 to April 1981. The percentage of males and females was .apprx. 1:1, the mean of individuals of undermined sex was 13.84% ranging from 42% in June of 1980 to 0 in Dec. 1980. Ripening and fully ripe individuals were observed throughout the year. There was no evidence of sexual reversal. The period of greatest spawning activity was from May-Sept., the percentage of spent individuals ranged from 70-50%, respectively. Active gametogenesis was observed with a decrease in the water temperature and salinity. The spawning peak coincided with high salinity and water temperature.

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