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Growth and Gonadal Development in Triploid Landlocked Atlantic Salmon (Salmo salar) (1984)

Benfey, Tillmann J. ; Sutterlin, Arnold M.

Canadian Science Publishing

In: Canadian Journal of Fisheries and Aquatic Sciences, 41 (9). pp. 1387-1392.

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Publication Date: 2019-09-13

Description: There was no difference in weight between diploid and triploid landlocked Atlantic salmon (Salmo saiar) measured over a 9-mo period, but triploids were consistently longer (FL) and thus had a lower condition factor than diploids. The gonadosomatic index (GSI) of triploid females was only 7.7% that of diploid females, while the GSI of triploid males was 52% that of diploid males. Triploid ovaries had the external appearance of undeveloped gonads, but every triploid female did in fact produce a small number of oocytes (from 1 to 12, versus several hundred oocytes in each diploid female). Triploid testes were well developed but contained few spermatids and no spermatozoa. Diploid testes, on the other hand, were in advanced stages of spermiogenesis. None of the triploid males reached spermiation.

Type: Article , PeerReviewed

Format: text

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