Methods for intravital diagnosis of the piscicultural quality of female sturgeon spawners (with reference to the stellate sturgeon Acipenser stellatus Pallas from the Kuban River
Badenko, L.V.; Kornienko, G.G.; Chikhacheva, V.P.; Altukhova, L.A.
Voprosy Ichtiologii 21(1): 104-111
ISSN/ISBN: 0042-8752 Accession: 005890480
Hb, protein and lipid content in blood serum was determined in 244 A. stellatus Pallas females collected during spring-summer spawning migration in 1969-1974. Gonad histology was studied. These indices are presented for females with gonads in the 3rd-4th, 4th incomplete and 4th complete stages of maturity, and which varied in their response to hormone effect. Fish preparation for the administration of gonadotropic compounds must be performed according to gonad maturity. Taking blood from the caudal vein does not harm the fish. Diagnosing the varying degrees of gonad maturity and the extent of each fish's reserve energy and plastic material during the prespawning period makes it possible to establish the correct dose of hypophyseal suspension and to determine the optimal length of time for keeping the brood stock at the fisheries.