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Reproduction of Annachlamys flabellata, Comptopallium radula and Mimachlamys gloriosa (Mollusca: Pectinidae) in the south-west lagoon of New Caledonia

Published online by Cambridge University Press:  15 January 1994

Yves Lefort  and
Jacques Clavier
Yves Lefort
Affiliation:
Centre ORSTOM, BP A5, Noumea, New Caledonia
Jacques Clavier
Affiliation:
Correspondence address: Centre ORSTOM, BP 70, 29280 Plouzané, France
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Abstract

In the south-west lagoon of New Caledonia, the first sexual maturity size is 45 mm for Annachlamysflabellata (Bernadi), 60 mm for Comptopallium radula (L.) and 50 mm for Mimachlamys gloriosa (Reeve). The global sex-ratio was not significantly different from 1:1 for C. radula unlike A. flabellata and M. gloriosa (1.3:1 for two species). The significantly greater mean size of females suggests a protandric sex reversal. The reproductive cycle was studied monthly for two years for M. gloriosa and one year for C. radula and A. flabellata, then weekly over periods of 12 months for M. gloriosa and 6 months for C. radula. Reproduction of the three species occurs throughout the year with a maximal activity during the warm season. M. gloriosa and C. radula are capable of spawning several times a month. Fluctuations of reproductive intensity are related to temperature and salinity fluctuations.

Keywords

BivalvePectinidPacificNew CaledonialagoonreproductionBivalvePectinidéPacifiqueNouvelle-Calédonielagonreproduction
Type
Research Article
Information
Aquatic Living Resources , Volume 7 , Issue 1 , January 1994 , pp. 39 - 46
Copyright
© IFREMER-Gauthier-Villars, 1994

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