New data on quantitative distribution of pacific salmons in the north-western part of the North Pacific in early spring
Trawl survey was conducted by RV TINRO in the western part of the Subarctic frontal zone from March 20 to April 17, 2009. The data on abundance and biomass of fish and cephalopod species in the epipelagic layer are analyzed, quantitative distribution and biological state of pacific salmons is considered in detail. Vertical distribution of these species is determined, their number and biomass within different layers from the sea surface to the depth 120 m are estimated. The most abundant was the layer 0-30 m where the total number and biomass of nekton (fish and squids) within the surveyed area was 60.4 million sp., 688.40 thousand tons, including the pacific salmons: 406.40. 106 sp. and 192.60. 103 t of pink, 65.60. 106 sp. and 38.40. 103 t of chum, 20.20. 106 sp. and 13.60. 103 t of sockeye, 0.16. 106 sp. and 0.14. 103 t of coho, and 0.27. 106 sp. and 0.54. 103 t of chinook.