Technological standardization as a method of verification of catch volumes for sharks and rays in the Black and Azov Seas

• Published in: Водные биоресурсы и среда обитания
• Main Authors: Esina, Lyubov, Gorbenko, L.A.
• Format: Other Non-Article Part of Journal/Newspaper
• Language: Russian
• Published: 2022
• Subjects: Squalus acanthias; Dasyatis pastinaca; Raja clavata; Spiny dogfish; Common stingray; Thornback ray; Aquatic biological resources; Beheading; Gutted fish; Norms of wastes; Акула-катран; Скат-хвостокол; Технологическое нормирование; ASFA_2015::R::Rays fisheries; ASFA_2015::P::Processing fishery products; ASFA_2015::S::Standardization; spiny dogfish; Катран
• Online Access: http://hdl.handle.net/1834/42556; https://doi.org/10.47921/2619-1024_2022_5_3_92

In the fisheries industry, the output norms for the the products of aquatic bioresources processing are used to verify the actual catch volumes. Establishing of the scientifically substantiated coefficients of raw material consumption per unit of output is one of the key factors in resources exploitation. This work is aimed at technological standardization—establishment of the norms of wastes, losses and the output of processed products obtained from cartilaginous fish species caught in the Black Sea. This investigation has been targeting spiny dogfish Squalus acanthias, common stingray Dasyatis pastinaca, and thornback ray Raja clavata. Exsanguination of live cartilaginous fish immediately after it has been caught is a prerequisite of its processing. Following the research and testing on identification of wastes and losses during the processing of spiny dogfish and rays, the average output values of processed fish have been identified and the coefficients of raw material consumption have been calculated, which makes it possible, based on the volumes of processed and dressed product, to evaluate the volumes of caught cartilaginous fishes, which is especially crucial for the sharks and stingrays, extremely sensitive to fishing pressure. In has been shown that the average output values for the spiny dogfish, dressed, gutted and headed, are 44.9 %. The output values for the split carcass (wings) of stingray and thornback ray slightly differ (50.4 and 51.8 %, respectively). Statistical processing of the output values for split carcasses of the rays has shown their adherence to the law of normal distribution. Thus, it seems practical to establish a unified coefficient of raw material consumption for all rays (1.938), without the distinction between their species. The coefficient of raw material consumption for the production of gutted (exsanguinated) spiny dogfish was 1.454, and upon its further processing (beheading) it became 2.398. В рыбной отрасли нормы выхода рыбной продукции используются для верификации ...