[Spawn and spat collecting relationship in Mimachlamys gloriosa (Reeve, 1853) and Brachtechlamys vexillum (Reeve, 1853), Pectinids of New Caledonia].
Pectinidae spat collecting was carried out during a period of 1.5 years in the southern lagoon of New Caledonia. The majority of spat collected were constituted by Mimachlamys gloriosa and Brachtechlamys vexillum larvae. Settlement showed quantitative variations during the year with a maximum in June-September and a minimum (close to zero) in summer (February). However, although adult stocks maintain a stable density and spawn all the year round, spawning intensity shows a maximum in austral summer, contrarily to the recruitment. Therefore, spawning and spat collecting present no correlation and high values of the gonadic index are not followed by numerous spat collecting. These two tropical species present an opportunistic reproductive model.
Chauvet
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Laboratoire d'étude des ressources vivantes, université de la Nouvelle-Calédonie, Nouméa, Nouvelle-Calédonie. chauvet@univ-nc.ncx735
D000818:Animals; D008974:Mollusca / Q000502:physiology*; D009510:New Caledonia; D011156:Population Density; D012098:Reproduction; D012621:Seasons; D013045:Species Specificity