Some points of catch structure and population parameters of the Black-Azov Sea pontic shad during the period 2004–2020

Abstract

Long-term data collected in the proccess of scientific monitoring of commercial fisheries in the Kerch channel of the Black-Azov sea pontic shad in period 2004–2020 was analyzed. Static and dynamic parameters of population was evaluated. Von Bertalanffy growth model parameters estimated: Linf = 32,0 cm, K = 0,31, t0 = -2,09. Age and weight cohort structure of commercial fisheries in investigation period was estimated. Following results of assessment on fisheriesbiological data, including accounting surveys and surplus production modeling results, the Black-Azov sea pontic shad (r. Don) stock status describe by reduction in fisheries biomass with stable catch structure and level.