Growth and gonadal development in diploid and triploid turbot (Scophthalmus maximus)
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AuthorsCal, R. (Rosa); Vidal, S. (Sergio); Gómez-Ceruelo, M.C. (María Castora); Álvarez-Blázquez, B. (Blanca); Martínez, P. (Paulino); Piferrer, F. (Francesc)
Turbot (Scophthalmus maximus)
This study determined the effect of triploidy on the survival, growth and gonadal development of turbot from 6 to 48 months of age. From 6 to 24 months of age (first sexual maturity), survival was similar in both ploidies ( P N0.05). From 24 to 48 months of age, after the first sexual maturity, survival was 91.9% in diploids and 100% in triploids, which did not exhibit the post-spawning-associated mortality. Growth was similar for both ploidies during the first year of life. After that, triploids grew significantly ( P b0.05) more that diploids, with more marked differences after each spawning season. From 24 to 48 months, the average weight difference between both ploidies was 11.4F1.9%, ranging from 4.3 to 23.0%. At 47 months of age, the biomass of triploids was 10.3% greater in total weight and 14.3% greater in eviscerated weight. Gonads of triploid males were similar to that of diploids, whereas in triploid females, they were significantly smaller and rudimentary. A histological ...