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Composition of the milt of some teleost fishes
Author(s) -
Piironen J.,
Hyvärinen H.
Publication year - 1983
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1983.tb04757.x
Subject(s) - milt , biology , salmo , sperm , rainbow trout , coregonus lavaretus , perch , fructose , citric acid , glycerol , trout , fishery , salmonidae , zoology , fish <actinopterygii> , biochemistry , botany
The milt composition of six freshwater teleosts was studied, and the measured parameters showed clear specific differences between species. The highest spermatocrits and sperm densities were observed in perch, Perc afluviatilis , and burbot, Lota lota , and the lowest in rainbow trout, Salmo gairdneri , and whitefish, Coregonus lavaretus . Fructose concentrations in the seminal plasma were small compared to mammalian values. The glucose concentrations in the seminal plasma were five times higher than those of fructose, and higher in landlocked salmon and rainbow trout than in the other species. The citric acid concentration of all species except whitefish showed a significantly positive correlation to either spermatocrit or sperm density. The role of citric acid in the seminal plasma of fishes was also assumed to be important. The glycerol concentration in the seminal plasma was comparatively high, and highest in whitefish. This was assumed to be related to the high applicability value of glycerol as a cryoprotective agent for whitefish sperm. The high glycerol concentration was also assumed to be related to the lipolytic capacity of the testis in the studied species.