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¹ Instituto Politécnico Nacional. Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional-Unidad Sinaloa., Aquaculture, Guasave/Sinaloa, Mexico
² Universidad Autónoma de Occidente, Unidad Regional Guasave, Environment, Guasave/Sinaloa, Mexico
³ Universidad Nacional Autónoma de México, Instituto de Ecología, Ciudad de México/CDMX, Mexico DOI : 10.4194/TRJFAS19537 Viewed : 1767 - Downloaded : 1116 The shell height-body weight relationship of the black clam Chionista fluctifraga cultivated in the intertidal of the southeastern Gulf of California, was evaluated for the first time, to improve the knowledge in determining its harvesting time. Clam seeds (n=900,000; 6.1±1.9 mm) were produced in the laboratory. The culture was divided into pre-fattening in racks on the bottom (2 months) and fattening directly in the bottom (16 months) from May 2018 to October 2019. Each month, 60 (n=1080) clams were randomly selected to stablish the morphometric relationship between shell height (SH) and body weight (BW). The growth rate (mm/d and g/d) was recorded. The SH-BW Interaction in both cultivation phases showed positive allometry. SH in pre-fattening and fattening registered a growth rate of 0.072 and 0.058 mm/d, respectively. In fattening, the interaction BW-SH displayed a high coefficient of determination (R2=0.99). A final survival rate of 90% was obtained. The results yielded the equations that describe the relative growth of C. fluctifraga for the fattening stage. A harvesting time after 10 months of fattening in the intertidal zone is stablished to reach the commercial size (35 mm, SH). Keywords : Morphometric relationships Relative growth Venus clam Molluscan aquaculture