Growth and survival of the freshwater clam, Galatea paradoxa (Born 1778) cultured on different substrata at the Volta estuary, Ghana

摘要

This study was conducted to assess the optimum clam size and substratum type for the culture of Galatea paradoxa. The experiment was conducted over a 90-day period at the Volta Estuary, Ghana. Three size classes of G. paradoxa categorized as small (27.6?±?0.4?mm), medium (36.8?±?0.4?mm) and large (50.0?±?0.6?mm), were used to ascertain the effect of a sandy and muddy substratum on growth performance and survival. Growth increased from the small-sized clams to the large-sized clams at 2.54, 3.03 and 3.43?g, respectively, over the experimental period. Growth was higher (P?40?mm) because of their relatively higher survivorship and better growth performance.