Russia: Tyumen branch of VNIRO completed the season of research of commercial invertebrates of Western Siberia

The scientists are focusing on crayfish. The raw material base of the lakes Andreyevskoye, Gryaznoye, Butorlyga, Lipovoye, Krugloye, Yantykovo and Kuchakovo has been studied. “We measure the caught crayfish: we look at their weight and commercial length, and also determine their sex. When calculating the recommended catch, only commercial specimens that have exceeded 10 centimeters in length are taken into account. We measure the rest and release them into the reservoir for growing. We enter all the data into the fishing log,” says Evgeny Brazhnikov, a leading specialist in the laboratory of commercial invertebrates of the Tyumen branch of the All-Russian Research Institute of Fisheries and Oceanography. The comprehensive study also included the collection of hydrobiological and hydrochemical samples, a study of abiotic parameters of the environment - measuring temperature, mineralization, transparency, water pH, the content of oxygen dissolved in water and depth. The work was ...