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Scientists reported on the study of the water area of Primorye
At the biological section of the Scientific Council of the TINRO-Center, a voyage report "Spatial distribution, composition of settlements and resources of commercial and mass species of benthic invertebrates in coastal waters of the Primorsky Territory" was heard, the center's press service reported. The scientists' expedition was carried out from August 8 to September 24 on the R / V "Ubezhdenny" as part of a comprehensive program of fishery research in the Far East basin in 2012-2016.
“With the help of diving research, 117 species of aquatic organisms were identified, the nature of distribution and the composition of settlements of commercial and mass species of invertebrates was studied,” said Dmitry Sokolenko, head of the mollusk study sector of the laboratory of invertebrate resources, to the members of the biosection. - Completed 968 diving stations, measured over 8 specimens of aquatic organisms. In addition, 000 hydrological and 78 light stations, 22 measurements of the radiation background of the environment and aquatic biological resources were carried out. The total area of the water areas surveyed by the diving method was 246 square kilometers. Samples of hydrobionts were collected for toxicological and microbiological analyzes.
In the area from the Rudnaya Bay to the Plastun Bay (northern Primorye), the total biomass of the macrozoobenthos is estimated at 10,3 thousand tonnes. The dominant species is the gray sea urchin, the total stock of which is estimated at 3,9 thousand tonnes, and the commercial reserve is 2,3 thousand tonnes. Stimpson's Mercenary is the second most common biomass (3,4 thousand tons), its commercial reserve is 2,9 thousand tons. There were found settlements of the seaside scallop, 86% consisting of non-target individuals, the total stock was 426 tons, commercial - 59 tons. Settlements in the area are not of commercial interest.
As noted by the speaker, in the bay of Boisman (Peter the Great Bay) and in the adjacent water area from Cape Krasny Utes to Cape Lion, the biomass of macrozoobenthos was 6,9 thousand tons in an area of 41,7 square kilometer. The share of bivalve mollusks accounts for 60% of the total biomass, of which Gray's mussel dominates (total stock - 1,9 thousand tons, commercial - 0,9 thousand tons) and spizula - 1,8 thousand tons and 1,7 thousand tons respectively. Sea urchins are the second biomass group (22%) in the investigated area, the black spherical (total stock 0,6 thousand tons) and heart-shaped (0,6 thousand tons) hedgehogs dominate.
Compared with the results of the 2008 survey, there was a significant, almost three-fold increase in the resources of the spice, due primarily to hydrological and meteorological conditions that are more favorable for the survey.
In the Desantna Bay area, the Lazurnaya Bay (Ussuri Bay), the biomass of macrozoobenthos is estimated at 1,8 thousand tons in an area of 7,8 square kilometers. The dominant group are bivalve mollusks (77% of total biomass), of which the largest reserves are mussel Gray (0,9 thousand tonnes) and spelled (0,4 thousand tonnes). The biomass of the black sea urchin was almost 0,3 thousand tons.
According to the experts of the branch science, in the investigated water area of the northern Primorye, the gray sea urchin and the merchantarium are promising, and in the Peter the Great Bay there are Spizul, Gray mussel and black sea urchin.