Size Structure Dynamics of the Sexual Maturation and Breeding Power of the Long-clawed Crayfish <i>Astacus leptodactylus</i> of the Water Bodies of Belarus and Armenia

A. V. Alekhnovych; E. Kh.  Ghukasian

doi:10.1615/HydrobJ.v50.i1.40

Hydrobiological Journal

Éditeur en chef: S. A. Afanasyev (open in a new tab)

Rédacteur en chef adjoint: V.I. Yurishinets (open in a new tab)

Secrétaire exécutif du comité de rédaction: L.I. Kalinina (open in a new tab)

Publication de 6 numéros par an

ISSN Imprimer: 0018-8166

ISSN En ligne: 1943-5991

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Size Structure Dynamics of the Sexual Maturation and Breeding Power of the Long-clawed Crayfish Astacus leptodactylus of the Water Bodies of Belarus and Armenia

Volume 50, Numéro 1, 2014, pp. 48-60

DOI: 10.1615/HydrobJ.v50.i1.40

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A. V. Alekhnovych
Research-Practical Center of the National Academy of Sciences of Belarus on Bioresources, Minsk, Belarus

E. Kh. Ghukasian
Institute of Hydroecology and Ichthyology National Academy of Sciences of Armenia Yerevan, Armenia

RÉSUMÉ

Paper deals with characteristics of populations of the narrow-clawed crayfish in the water bodies of Belarus and Armenia. The growth rate, beginning of the sexual maturation and average size of females at 50% maturity in the Belarusian lakes Gin'kovo and Sominskoye and Armenian Sevan Lake were found to be quite comparable. Coupling and oviposition onto the pleopods in the Belarusian population occur in late October − early November, in the Sevan population − in the early April; breeding power of the Sevan population is 1.5 times higher than those of Belarusian. In spite of the all-year intensive commercial catching, average size of the specimens of in the Sevan population is somewhat more than in Belarusian.

MOTS CLÉS: the narrow-clawed crayfish Astacus leptodactylus, lakes of Belarus and Armenia, breeding power, sexual maturation, size structure.

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