Identification of the annual catch and fishing measures that ensure the optimal fishing of narrow-clawed crayfish Pontastacus leptodactylus in the waterbodies of Belarus
https://doi.org/10.29235/1029-8940-2019-64-3-277-285
Abstract
An annual catch of 45 % of the commercial stock is recommended on the basis of productivity and mortality of mature individuals. Commercial stock is made up of individuals with a total length of ≥ 10.5 cm (from the tip of the rostrum to the end of the telson, TL). Female individuals of narrow-clawed crayfish participate in 1–2 reproduction periods before they reach the commercial stock value of 10.5 cm. Crayfish individuals of 12 cm TL at the age of 5 years have the maximum observed growth rate. At the age of 3 years, crayfish individuals have the maximum observed cohort biomass (a group of evenaged individuals).
About the Author
A. V. Alekhnovich
Scientific and Practical Center for Biological Resources of the National Academy of Sciences of Belarus
Belarus
Belarus
Anatoly V. Alekhnovich – Ph. D. (Biol.), Leading researcher
27, Akademicheskaya Str., 220072, Minsk, Republic of Belarus
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