An assessment of the effects of climate changes on Pacific salmon productivity in Russian Far East was made based on longterm data (1971-2015), including commercial fishery statistics and monitoring rows on 17 indices of teleconnection patterns. The assessment was made for three mass species - pink, chum and sockeye salmon. The values were obtained for three basin groups of stocks: PBS - the Pacific-Bering Sea group (East Kamchatka and Chukotka; SOS - the Southern Okhotsk Sea group (Sakhalin, Kuriles, the Amur River basin, Primorye); NOS - the Northern Okhotsk Sea group (West Kamchatka, continental coast of the Sea of Okhotsk). 6 Бугаев, Тепнин, Радченко The assessment of the interrelation and the selection of the indices of teleconnection patterns were carried using correlation and the principal component analysis. The results obtained allowed to figure out 10 indexes with the maximal time series (45 years), including ALPI, PNA, WP, PDO, NP, AO, N.HEMI+dSST, Ap, Sun Spot, LOD. Method of moving average was used in the calculations for making the rows of the average annual climate indexes. Averaging for particular species was carried out depending on duration of feeding at sea. In this connection the values of the moving average took into account the ranges of the variable values of indices from the year of juvenile migration to seawater and leaving the coast for the ocean waters (the age n.0) to the year of mass maturation (in the age 0.1 for pink salmon (averaging for two years - the ages 0.0 and 0.1), in the age n.3 for chum and sockeye salmon (averaging for 4 years - the ages n.0, n.1, n.2 and n.3)). In this way, the values obtained could demonstrate the effects of the climate factors on the Pacific salmon catches (production) taking into account the effects on salmon environment for the entire period at sea. Step-by-step multivariate regression analysiswas provided based on the indexes-indicators figured out and made figuring out the climate factors, which are the most affecting salmon prodiction in the basin groups of stocks of Pacific salmon in Russian Far East. All results obtained demonstrated authentic interrelations (p < 0.05-0.001) where the coefficients of the multiple regression from moderate (R = 0.36-0.74) to strong (R = 0.75-0.93). The highest level of the correlation “Pacific salmon production - the indices of teleconnection patterns” was revealed for chum and sockeye salmon, the species with a long period of feeding at sea. The indexes for pink slmon were visibly lower in the PBS and NOS groups. For the SOS group the coefficient of the multiple correlation was high. The results of the analysis made it possible to figure out the major active climate components as the N.HEMI+dSST (the index of the global temperature anomaly in the Earth Northern hemosphere), the PDO (the Pacific Decade Oscillation), the Ap (the index of the geomagnetic activities). The analysis of the zonal effects of the water temperature anomalies (aOST) in the areas of fall and winter feeding of Pacific salmon in the 1-st year of ocean life in the seas of Far East and Subarctic zone of Pacific Ocean has it indicated, that for the Okhotsk Sea groups (SOS and NOS) the maximal correlation the “aOST- catches” was in the fall in the central and southern Okhotsk Sea and also in the Pacific Ocean waters adjacent Kuriles: r = 0.4-0.7. The maximal correlations for the PBS group was in the west part of the Bering Sea: r = 0.3-0.5. The effects of the temperature factors on salmon productivity were visibly lower during winter feeding.

Results of analysis of saffron cod and walleye pollock alevin morphotype variations are demonstrated. The amplitude of variation of particular characteristics, expressed as variation coefficient, is not big, what indicates about homogeneity in examined samples. During the growth significant transformations of plastic features were found in different size groups. The saff ron cod individuals with the body length of 60 -80 mm demonstrated reliable (p ≤ 0,001) differences from smaller fish with the length 20-40 mm on 4 of 8 characteristics examined. Walleye pollock with the length of 60-80 mm demonstrated differences from the fish with the length of 40- 60 mm on 2 characteristics. With increasing body length and weight, the head of saffron cod and pollock fry gets shorter and the diameter of the eye - less. The comparison has demonstrated similar nature of the changes of the morphotype.

Qualitative and quantitative composition of stomach contents is described for golden king crab Lithodes aequispinusBenedict, 1895 and blue king crab Paralithodes platypus(Brandt, 1850) from the northern of the Sea of Okhotsk. The analysis of the stomach contents of the golden king crab L. aequispinushas shown that the main food within the area of the research majorly consisted of Echinodermataand Polychaeta(42.7% and 25.2%, respectively) and minorly of Bryozoaand Decapoda(7.6% and 6.1%). The main contribution in feeding of non-commercial and commercial males of golden king crab L. aequispinuswas provided by echinoderms, and in females - by polychaetes. The average index of filling of stomachs was 11.4‱. The major component of the food of blue king crab P. platypusincluded fish species (18.0% in the total mass). Spongia, Polychaeta, Mollusca, Decapodaand Echinodermatawere minor components (10.2%, 9.7%, 9.6%, 8.1% and 7.2%, respectively). The average index of filling of stomach was 12.9‱

The composition of the food of blue king crab in Babushkin Bay (the Sea of Okhotsk) in July 2011 was analyzed. The main element of the benthic fauna was represented by barnacles of the genus Balanus, and it also was the main food component of blue king crab. Analysis of the weight of stomach content of the crab demonstrated different feeding structure for males and females. Crustaceans dominated (92.1%) in the food of females, while the contribution of the other components (mollusks, polychaetes, algae) was humble. Males generally consumed more mollusks (33.3%) and polychaetes (10.0%), although barnacles were similar important (51.2%) for males and females. The contribution of algae and detritus to the weight was poor. Although the food was similar available for males and females, the gender feeding intensity was different. Females, both mature and immature, demonstrated intense feeding - the average index of stomach filling was 19.97 and 25.26‱, respectively. Feeding of non-commercial males was less intense - 7,60‱.

Distribution and abundance, size-weight and age structures of colonies of Sakhalin surf clam were analyzed on the results of surveys works carried out in the Salmon Bay in 1966-1969, 1998-2003 and 2011-2012. Evaluation of the current and resource state of Sakhalin surf clam is made.

Results of Pacific salmon fishery campaign in Kamchatka in 2017 are demonstrated. Data on the salmon commercial marine and coastal catches in different fishing plots of fishing were analysed depending of the type of fishing gear used. General specifics of the gears and typical patterns are described for salmon fisheries using different gears. Recommendations to further design and development of salmon fisheries in Kamchatka are provided on the results obtained.