Current status of the Azov populations of bream Abramis brama and sea roach Rutilus rutilus
2018
Balykin, P.A. | Kutsyn, D.N.
In this paper, the state of populations of bream and sea roach of the Azov Sea in the period 2003–2015 is estimated. Based on the fishery statistics, the contribution of these objects to the total catch is considered. The long-term dynamics of the size-age structure of their populations is presented, as well as the proportion of sexually mature depending on linear dimensions. It has been established, that the first time ripening individuals are the basis of bream and sea roach populations, up to 60–70% of which are taken out by the fishery during the transition to the next age group. The conditions of bream and sea roach habitat in Taganrog Bay are estimated. As a result of the salinization of the Azov Sea and the shallowing of the river Don there is a regular deterioration in the conditions of feeding and reproduction of semimigratory fish. With a view to preserving and restoring the number of bream and sea roach, restriction of their fishing for the period of low water in the Don and the salting of the Azov Sea are proposed
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