EXTERNAL SEX SPECIFIC FEATURES IN THE STRUCTURE OF SCUTES OF LARVAE AND JUVENILES OF STERLET
Abstract
We were the first in the practice of aquaculture who found that dorsal scutes of maturing sterlet had significant sex-dependent morphological differences. To assess the morphological structure of the dorsal scutes, it was proposed to define two groups of indicators characterizing the scutes shape, as well as the structure of the cusps of scutes. We found that dorsal scutes of males are more extended in width and have a flattened shape. Dorsal scutes of males have long and thin cusps of larger larger than that of females. For the first time it was found that the established dependence on the structure of dorsal scutes of sterlet is also saved in juveniles with an average length of 24.8 ± 1.5 cm and larvae with an average length of 70.3 ± 3.6 mm. Our results form a methodological basis for global aquaculture practice in effort to develop systems of early and very early sex identification of all Acipenseridae, including the one on the early stages of ontogeny.
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Review
For citations:
Barulin N.V. EXTERNAL SEX SPECIFIC FEATURES IN THE STRUCTURE OF SCUTES OF LARVAE AND JUVENILES OF STERLET. Zootechnical Science of Belarus. 2017;52(2):89-99. (In Russ.)
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