Effects of Geographical Origin and Timing of Broodstock Collection on Hatchery Conditioning of the Clam (L. 1758).

The grooved carpet shell clam (), widely found along Morocco's coasts and estuaries, is a key economic resource due to its high market value. However, clam production has declined over recent decades, largely due to the overexploitation of natural beds, and recruitment failures, leading to a limited wild spat availability. This study examined how the broodstock collection season (winter vs.

Genetic variability in clam combined with infection level to support founder population selection for a breeding program.

Clam farmers worldwide face several challenges, including irregular seed supply and high mortalities due to pathogenic organisms such as . In Europe, there is a high unmet consumer demand for native clam species such as . The high market value of makes the culture of this species potentially more attractive than that culture of the alien species .

Following the infection process of vibriosis in Manila clam (Ruditapes philippinarum) larvae through GFP-tagged pathogenic Vibrio species.

Vibriosis represents the main bottleneck for the larval production process in shellfish aquaculture. While the signs of this disease in bivalve larvae are well known, the infection process by pathogenic Vibrio spp. during episodes of vibriosis has not been elucidated.

Essential Fatty Acid Assimilation and Synthesis in Larvae of the Bivalve Crassostrea gigas.

Essential fatty acids (EFA) are important for bivalve larval survival and growth. The purpose of this study was to quantitatively assess for the first time through a mass-balance approach dietary EFA incorporation and synthesis within Crassostrea gigas larvae. A first experiment was carried out using two microalgae, Tisochrysis lutea (T) and Chaetoceros neogracile (Cg), as mono- and bi-specific diets.