Fully Controlled Production and Sex Control of European Catfish (Silurus glanis Linnaeus, 1758)

Abstract

This study aims to fully controlled production of european catfish (Silurus glanis) and to increase fertilization and survival rates using different solutions and methods, enrichment of natural stocks with the obtained larvae and to provide participation as a new species in addition to species cultivated in Turkey. The study was carried out in Gürle Trout Farm in Manisa province. Eggs and sperm, that had been obtained from the broodstock, exposed to various fertilization methods and the fertilized eggs were put in the zuger jars and made triplicate trials. As a result, in this study, under the light of the findings obtained from different fish that was captured in different times and from two different regions; eggs that were treated with the urea-salt solution fertilization, eying and survival rates were higher than only salt solution application. Urea-salt solution for 10 minutes and the salt solution for 10 minutes were more successful. In addition, the time problem of working with living materials has become one of the biggest obstacles to this work. It is imperative that the reproductive cycle occurs once a year and in case of failure, it is needed to wait for the next cycle. In this context, it was not possible to tolerate the problems experienced in egg-taking, fertilization and survival activities in the last attempt. Therefore, the project had to be terminated here.