Aspetti della riproduzione e della biometria in Acanthocardia tuberculata (L.) (Bivalvia, Cardiidae) del Golfo di Trieste.

Abstract

Abstract - Aspects on the reproduction and biometry of Acanthocardia tuberculata (L.) (Bivalvia, Cardiidae) of the Gulf of Trieste. - In a part of the sampled population of Acanthocardia tuberculata the sexual maturity occurs in December and the spawning begins in January and extended to May-June. This length of the spawning and the constant presence of animals in gametogenesis or mature, implicate different spawning and every individual can participate (o more than one spawning. The spent stage begins in June and extended to October, but predominates since July in September. The analysis of some indexes of condition allowed to underline the significative correlations with the reproductive cycle