Abstract
ABSTRACT Razor clam species are commercially important worldwide. In Tunisia, studies on razor clams aim to promote harvesting and ensure a rational and durable exploitation. In Tunisia, Solen marginatus (Pulteney, 1799) is the most abundant razor clam species although Ensis species, particularly Ensis minor, are also found. The aim of this study is to understand the allocation strategies of S. marginatus in terms of growth and reproduction. For that, condition indices and histological analysis were performed and related to temperature and chlorophyll a. Clams were collected monthly in the southern Mediterranean Sea (Gulf of Gabes, Tunisia). Body and somatic mass increased in summer and autumn. Body condition was highest in September 2007 and the highest somatic condition index was measured in August 2008. Body and somatic mass loss occurred in winter and late spring-early summer with lowest values found, respectively, in February and May 2008. Gametogenesis rate was slow and held in a synchronous way dur...
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