Some preliminary results of research on Emperor Seamounts in April, 2019
2019
Somov, A.A. | Kanzeparova, A.N. | Vazhova, A.S. | Khleborodov, A.S. | Zuev, M.A. | Slabinsky, A.M. | Orlova, S.Yu. | Kurnosov, D.S. | Belyaev, V.A. | Orlov, A.M.
In April 2019, hydrological, hydrochemical, planktonological and ichthyological studies were carried out in the waters of the central part of the Emperor Seamounts (northwestern Pacific). The species composition of fish was determined. The ratio of the main fish species on the Koko seamount was analyzed at different periods. New fish records in the study area were reported. The diet of main fish species was identified. The species composition of the cephalopods was determined. In recent years, in contrast to the 1960–1980s, the dominant species on Koko seamount was pencil cardinal Epigonus denticulatus, which density in 2019 was 3.7 t/km2. The most abundant commercial species in the past, pelagic armorhead Pseudopentaceros wheeleri and alfonsinos Beryx spp. currently did not form dense aggregations, their averaged density was 357 and 230 kg/km2 respectively. At present, the estimated commercial importance of the central part of the Emperor Seamounts is low.
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