Archives / Volume 47
УДК 639.22(265.53) DOI: 10.15853/2072-8212.2017.47.5-45Download the full article
Walleye pollock (Theragra Chalcogramma) fishery in the waters ajaсent to Kamchatka Peninsula in 2003–2015
The work provides analysis of the role of walleye pollock in the World and Russian fishery. Evolution of Russian legislation in the field of fishery regulation in the waters adjacent to Kamchatka Peninsula is reviewed. Characterization of walleye Pollock fishery is made by stocks (North of Sea of Okhotsk, East Kamchatka, West part of the Bering Sea): fishery development history, TAC and catch dynamics, regulation measures, interannual dynamics of catch on fishing gears, walleye pollock portion in catches by different fishing gears, seasonal dynamics of walleye pollock catch on main types of gears, interannual dynamics of efforts number and catches per on unit efforts for the main types of vessel and gears. The period from 2003 to 2015 was used for the research.
УДК 574.5(285:571.66):597.552.511 DOI: 10.15853/2072-8212.2017.47.46-64Download the full article
Condition of kokanee (Oncorhynchus nerka) population in Tolmachevskoye Reservoir in 2017
Results of monitoring of the condition of kokanee Oncorhynchus nerkapopulation in Tolmachevskoye reservoir in 2017 are demonstrated comparing the period 2011–2016. Analysis of the length-weight, age and gender structures, fecundity, health condition of feeding and spawning parts of the population in the river-reservoir continuum is provided. Assessment of stock abundance and spatial distribution of kokanee on the acoustic data is made.
УДК 639.2.053.7 DOI: 10.15853/2072-8212.2017.47.65-76Download the full article
Analysis of spatial distribution of flounder catches in the waters adjacent and off kamchatka for 2011–2016 on the data of the fisheries sectoral monitoring system
Based on statistical data of the fisheries sectoral monitoring system about disposition of vessels, intervals of commercial operations and catches by dates we made an attemps to clarify commercial statistics about distribution of the catches of flounders in 2011–2016 between the fisheries districts in the waters off Kamchatka. It was found, that real number of productive vessel-days in the course of fishing of flounders can be higher for some vessels than nuber of daily reports, where the catches of flounders were reported. Incorrect reporting, where the reports about the catches were made in the other, usually adjacent districts, were revealed for seven of eight districts examined.
УДК 597.553.2:59.087 DOI: 10.15853/2072-8212.2017.47.77-90Download the full article
Using the photo- and video records for assessment of Pacific salmon escapement on migration routes and spawning grounds: some of methodical approaches
As checking salmon escapement from the air (helicopter) is getting less extensive and detailed in Kamchatka, making photographies of spawning grounds has been resumed in two versions – from the shores and from the air (quadrocopter), and method of assessment of salmon escapement via statistical analysis of the photo-data was proposed based on obtained photographs of spawning grounds and migration routes. The essence is to figure out the number of the fish on calculated average values for each of loci and interpolating with the use of GPS-tracks. To legalize the method there was a comparison provided in 2017 between expert and methodical estimations for sockeye salmon in the basin of Nachikinskoye Lake, where early and late races spawned. It is demonstrated that the error (underesimation) for the late race was from 4 to 77%. Sockeye salmon escapement was evaluated based on the data. Discussion of the details of the method and versions of application and processing the data is provided.
УДК 599.51/.53 (265.53) DOI: 10.15853/2072-8212.2017.47.91-102Download the full article
Opportunistic cetacean observations in North-Western Pacific and Sea Of Okhotsk in May–June 2017
The observations reported here were conducted aboard the vessel “Professor Khromov” during its trip from Petropavlovsk-Kamchatsky to Commander Islands, Kuril Islands and along the western coast of the Sea of Okhotsk. In 24 days we traveled 7834 km during which we made 212.5 hours of visual observations of the water area. We recorded 65 encounters with 176 cetacean individuals of ten species. Seventy-three percent of observed encounters were off the Eastern Kamchatka and Commander Islands. The Eastern Kamchatka and Commander Islands regions in May–June are important migration and foraging areas for cetaceans, including endangered species such as blue whale, fin whale and humpback whale.
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