Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 2
Written by Daniela Cristina IBĂNESCU, Lorena DEDIU
The main aim of the paper is to investigate the condition of the population of this fish species in a sector of the Romanian Danube River. The common bream is an important species in commercial catches, therefore the knowledge of its growth parameters is important for management of the multi - species fishery. The study is based on a sample of 1580 specimens caught with a total biomass of 197.66 kg. The study took place between 2018 and 2019. Our objective was to estimate the growth parameters (von Bertalanffy) L∞, k, t and the mortality rates (Z, M, F) for the bream population (Abramis brama, Linnaeus, 1758) in the Danube. The relationship between length - weight (L-W) in the study period for common bream population is ? = 0.0201 ∗ ?t2,9212. Von Bertalanffy growth parameters were found as, asymptotic length Lꚙ= 49.35 cm, growth coefficient (K) = 0.37 yr-1. The estimated values of the mortality rates for the studied population are: total mortality (Z) is 1. 51, the natural (M) reaches 0.55. and fishing mortality (F) is .0.96.
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