Management of fisheries and restoration of whitefish-nelmushka commercial stocks in Kubenskoye Lake of Vologda Region

Abstract

The purpose of this article is analysis of the relevance of whitefish commercial fisheries regulation in Kubenskoye Lake and development of measures to preserve the endemic whitefish population, increase its commercial stocks and catches.The material for the study is the statistics of whitefish-nelmushka catches in Kubenskoye Lake and the longterm dynamics of the size and age characteristics, terms of puberty.The research methods: field ichthyological materials were collected and processed according to standard methods; the fishing stocks were estimated based on the results of the analysis of non-water fishing catches, as well as taking into account the volume of water filtered by fixed fishing nets per unit of time.Results: the long-term dynamics of whitefish-nelmushka catches are described in the article. The effectiveness of its fisheries regulation has been studied. Fishing does not have a significant impact on the whitefish abundance dynamics. The exclusion of whitefish from the category of aquatic biological resources, in respect of which the total allowable catch is established, is justified in the article. The size and age population characteristics of the whitefish, age of puberty last years have been summarized in the article.Practical significance: artificial reproduction of the Kubenskoye Lake whitefish is recommended to be carried out to restore the population abundance, which is significant for the preservation of the gene pool of the polymorphic species Coregonus lavaretus. Recommendations on changing the Fishing Rules for the Northern Fishery Basin to reduce the legal size for whitefish-nelmushka were developed for the implementation of commercial and recreation fisheries.