Boodstock conditioning and gonadal development of the smooth clam Callista chione (Linnaeus, 1758) (Mollusca: Bivalvia) on the Catalan coast (NE Spain)
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In order to select the most suitable broodstock conditions for Callista chione a conditioning experiment was performed and the gametogenic cycle of a natural population on the coast of Arenys de Mar (Catalonia, NE Spain) was studied. The influence of food availability and sand bed presence on energy balance and gonadal development was analyzed and the proliferation of intracellular bacteria in gills was monitored. The gametogenic cycle started between August and September. In November most of the gonads were ripe and spawning began in December. The higher abundance of spawning clams was between January and April (with sea surface temperature 13-15ºC). Three experimental conditions were tested in September at a constant temperature of 14ºC: T1 (0.10% of organic weight of microalgae as a proportion of the live weight of the clams per day and a sand bed); T2 (0.05% and a sand bed); T3 (0.10% without a sand bed). Gonadal maturity was a priority for this species and was reached at the end ...
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