Results 71 to 80 of about 820 (178)

Variability of stock status walleye pollock fishery

open access: yesProblems of Fisheries
The analysis of the variability of walleye pollock stocks assessment and fisheries showed that in most areas the degree of exploitation is at a low level (4,7–13,5%), with the exception of the Navarinsky region of the Bering Sea, the coast of eastern Kamchatka, the northern Kuril Islands and western Sakhalin (16,7–18,9%).
openaire   +1 more source

A novel approach for rapidly determining the reproductive status of walleye pollock (Gadus chalcogrammus) using Raman spectroscopy

open access: yesFrontiers in Marine Science
Knowledge of the reproductive biology of fishes is essential for effective fisheries management. Information derived from an understanding of fish reproduction, such as size and age at maturity, is used in models to assess fish stocks and can affect ...
Sandra K. Neidetcher   +6 more
doaj   +1 more source

Underwater observations on fish behavior to determine the coefficient of catchability for Danish seine

open access: yesИзвестия ТИНРО, 2016
Underwater observations were conducted to assess the impact of the research Danish seine elements on behavior of walleye pollock Theragra chalcogramma in its active zone.
Ivan V. Roy
doaj   +1 more source

Assessment of stock, spatial distribution, and recruitment of walleye pollock in the northern and eastern Bering Sea

open access: yesИзвестия ТИНРО, 2016
Abundance and biomass of walleye pollock Theragra chalcogramma in the Bering Sea exceeded the mean values in 2015 owing to the high-abundant year-classes of 2008 and 2012 and several medium-abundant year-classes (of 2006, 2009-2011, 2013, and 2014).
Mikhail A. Stepanenko, Elena V. Gritsay
doaj   +1 more source

On simplified interpretations of limiting factors and dynamics of for abundance for some commercial fishes in the Far Eastern waters

open access: yesИзвестия ТИНРО, 2017
Modern views on dynamics of some mass fish species, as walleye pollock Theragra chalcogramma , pacific salmon Oncorhynchus spp., and japanese sardine Sardinops melanosticta are critically analyzed.
Vyacheslav P. Shuntov
doaj   +1 more source

Features of feeding for pacific herring Clupea pallasii, walleye pollock Theragra chalcogramma, and arabesque greenling Pleurogrammus azonus in Peter the Great Bay (Japan Sea) in summer season

open access: yesИзвестия ТИНРО, 2014
Qualitative and quantitative indices of feeding and competitive relationships are investigated for pacific herring Clupea pallasii , walleye pollock Theragra chalcogramma , and arabesque greenling Pleurogrammus azonus on the data of bottom trawl surveys ...
Olga I. Pushchina   +2 more
doaj   +1 more source

Interannual variability of nonlinear internal wave characteristics in the Pacific Ocean off the Kamchatka Peninsula and the Northern Kuril Islands

open access: yesFrontiers in Marine Science
In the North Pacific Ocean off the Kamchatka Peninsula, nonlinear internal waves (NLIWs) are still studied insufficiently. The purpose of the study was to establish patterns in the distribution of NLIW characteristics and the reasons for their ...
Alexey Zimin   +10 more
doaj   +1 more source

Sexual dimorphism in postembryonic development of saffron cod Eleginus gracilis, walleye pollock Gadus chalcogrammus and pacific cod Gadus macrocephalus

open access: yesИзвестия ТИНРО
Based on the allometric equation of J. Huxley and S. Brody model of body weight, sexual dimorphism and allometric variability between males and females is determined for the first time in postembryonic development of three fish species, using factor and ...
О. V. Novikova
doaj   +1 more source

Responses of the Northern Bering Sea and Southeastern Bering Sea Pelagic Ecosystems Following Record‐Breaking Low Winter Sea Ice

open access: yesGeophysical Research Letters, 2019
Bering Sea sea ice during winter 2017–2018 was the lowest ever recorded. Ecosystem effects of low ice have been observed in the southeastern Bering Sea, but never in the northern Bering Sea.
Janet T. Duffy‐Anderson   +16 more
doaj   +1 more source

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