Differentiation populations of the saffron cod Eleginus gracilis (Gadidae) of the cape Terpeniya, south-east and north-west of Sakhalin island using biological tags

Abstract

To differentiate Sakhalin saffron cod, 3 types of parasites can be used: Pyramicocephalus phocarum pl., Nybelinia surmenicola pl. and Echinorhynchus gadi. From a practical point of view, as a biological label for the differentiation of the navaga hall. It is advisable to use indicators of infection with Nybelinia surmenicola l in the south-east of Sakhalin and the north-west of the island. To determine the location of the catch of the navaga (applicable only for the areas of the north-west, south-east of Sakhalin and zal. Patience) it is necessary to examine at least 100 specimens of fish.