No abstract

Stepwise multidimensional regressive analysis was carried out based on the long-term data (1971–2018), including biological statistics and series of observations on 10 climate indices, allowing to identify the most meaningful climatic factors affecting the numbers of some fish species at different stages of the ontogenesis in the Eastern part of the Sea of Okhotsk. All the results obtained indicate of existing true correlations with the number of the two-years-old individuals and the number of the fish reached the age of the mass (>50%) maturation. Threedimension regression models, describing the dynamics of the initial number of some fish satisfactorily. Were made, based on the obtained equations of multiple regression of the relationship between the number of the fish and the most effective climatic indices selected. The major indices affecting the abundance of different fish species are: SST, NPGO, SanSpot – Pacific herring; NPA – saffron cod; PDO – Pacific cod; NPA, SanSpot – great sculpin; SanSpot, PNA, AO – yellowfin sole; PDO, SSTa – Pacific halibut; Ice SanSpot, NPGO – Greenland turbot. Pelagic, demersal and bottom species are under the complex influence of the oceanographic, meteorological and planetary-space indices.

На основе материалов ихтиопланктонных съемок, выполненных у берегов Западной Камчатки в 1964-2005 гг., приведены данные о среднемноголетней плотности и частоте встречаемости личинок восточноохотоморской мойвы, построены карты распределения, проведен анализ их распределения в зависимости от динамики вод после «теплых» и «холодных» зим.

Петропавловско-Командорской подзонах освоение мойвы значительно превысило рекомендуемый вылов. В уловах мойва из Охотского моря по длине (18,0 см) сходна с беринговоморской (18,0 см), но значительно превосходит ее по массе (41,2 г против 14,6 г). Наиболее крупной является мойва, обитающая в Японском море (Западно-Сахалинский рыбопромысловый район), достигающая длины 21,0 см и массы 59,0 г.

Data on the local distribution of capelin in the eastern part of the Sea of Okhotsk in 2000–2019 are very limited. Maps of the distribution were made based on results of complex pelagic surveys in 2000–2019. It is demonstrated, that spring distribution of capelin in the Eastern Sea of Okhotsk varied depending temperature conditions in each particular year. Major aggregations of capelin were observed within Shelikhov Gulf in spring. In the “cold” years these aggregations were in the south-western part of the West Kamchatkan shelf, and in the “warm” years – in the north-western part. In sense of bathymetric distribution the main body of the capelin aggregations was observed in the upper part of the shelf at the depth <125 m at the temperatures bit lower zero.