ECONOMIC EFFICIENCY OF FISHING EFFORT
Journal Title: Вестник Астраханского государственного технического университета. Серия: Рыбное хозяйство - Year 2014, Vol 0, Issue 2
Abstract
The studies on determination of economic efficiency of fishing effort considering productivity and selectivity of catch by netting fish gears were conducted; the values determining the absolute weight of the total catch, catch of fish of commercial size and noncommercial size in continuous and discrete form were investigated; the values for profit and cost price corresponding to the cases of calculating the economic efficiency of fishing, when the price of fish of any size is identical and when the price of fish gradually increases alongside increasing its size were fixed. Using these values for each object of catching and for all objects of catching it is suggested to build the graphs of the dependence of the profit from the mesh size and to determine the size of a mesh, which pro-vides maximum benefits when fishing on multispecies aggregations. The examples of calculations of dependence of the value of marketable products, full cost price and profit from the mesh size for catching of mackerel with pelagic trawls in the area of South East Atlantic and catching of bream, carp and catfish with nets in the Volga delta were described. Just like when catching of single-species aggregations with nets, graphs of profits when catching of multispecies aggregations have extremum, and this dependence can be used to refine the mesh size, obtained from other considerations. It is shown that the fishery economic calculations can significantly improve the efficiency of fishing, as well as the accuracy of estimation of commercial fish stocks.
Authors and Affiliations
Kirill Melnikov, Alexander Melnikov, Yuri Grebenshchikov
Keywords
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