Results 31 to 40 of about 5,753 (262)

A mitogenomic approach to the taxonomy of pollocks: Theragra chalcogramma and T. finnmarchica represent one single species

open access: yesBMC Evolutionary Biology, 2007
Background The walleye pollock (Theragra chalcogramma) and Norwegian pollock (T. finnmarchica) are confined to the North Pacific and North Atlantic Oceans, respectively, and considered as distinct species within the family Gadidae. We have determined the
Coucheron Dag H   +5 more
doaj   +1 more source

Spatial match-mismatch between juvenile fish and prey provides a mechanism for recruitment variability across contrasting climate conditions in the eastern Bering Sea.

open access: yesPLoS ONE, 2013
Understanding mechanisms behind variability in early life survival of marine fishes through modeling efforts can improve predictive capabilities for recruitment success under changing climate conditions.
Elizabeth Calvert Siddon   +5 more
doaj   +1 more source

Acoustic discrimination between juvenile walleye pollock and pointhead flounder

open access: yesAcoustic discrimination between juvenile walleye pollock and pointhead flounder, 2020
When using acoustic methods to investigate fish biomass, it is important to distinguish the target species from other organisms. Previous limitations to acoustic information in surveys meant it was not possible to discriminate juvenile walleye pollock from their predator, pointhead flounder, in Funka Bay, Japan, possibly leading to overestimates in ...
Naizheng Yan   +3 more
openaire   +3 more sources

Swimbladders under pressure: Anatomical and acoustic responses by walleye pollock [PDF]

open access: yesThe Journal of the Acoustical Society of America, 2006
Pressure influences echo intensities of swimbladdered fish through changes in swimbladder volumes and surface areas. Volume reduction is expected to correspond to Boyle’s law (volume ∝pressure−1) but the resulting deformation in swimbladder surface area will largely determine target strength at geometric scattering frequencies.
John K. Horne   +5 more
openaire   +1 more source

Oceanographic conditions and analysis of walleye pollock Theragra chalcogramma fishery in the Navarin area in 2017–2021

open access: yesИзвестия ТИНРО, 2022
The northwestern Bering Sea, in particular the waters at Cape Navarin, is one of the main areas of the walleye pollock fishery. Environmental variability in the Bering Sea affects on recruitment, abundance, behavior, and seasonal spatial distribution of ...
E. V. Gritsay, M. A. Stepanenko
doaj   +1 more source

The content of trace elements in the muscle tissue of some species of aquatic organisms from the Sea of Okhotsk waters of Northeastern Sakhalin [PDF]

open access: yesГеосистемы переходных зон, 2023
The content of Fe, As, Cu, Mn, Cr, Ni, Pb and Cd in the muscles of some aquatic organism species from the Sea of Okhotsk waters of Northeastern Sakhalin was estimated: walleye pollack (Gadus chalcogrammus Pallas, 1814), longhead dab (Limanda proboscidea ...
Yury N. Poltev   +3 more
doaj   +1 more source

Sensitivity analysis of the multispecies virtual population analysis model parameterized for a system of trophically-linked species from the eastern Bering Sea

open access: yesCiencias Marinas, 2004
A sensitivity analysis of a multispecies virtual population analysis (MSVPA) model parameterized for the Bering Sea was carried out using two methods for the analysis.
J Jurado-Molina, P Livington, VF Galluci
doaj   +1 more source

Feeding of walleye pollock and its feeding base in the Chukchi Sea in summer-autumn period

open access: yesИзвестия ТИНРО, 2023
Data on feeding of walleye pollock <i>Gadus chalcogrammus</i> (3–70 cm long) in the Chukchi Sea in summer-autumn of 2017–2020 are presented. The food base includes zooplankton, benthic invertebrates and fish. The juveniles in the northwestern
N. A. Kuznetsova, M. A. Shebanova
doaj   +1 more source

Oceanographic conditions within the main area of walleye pollock

open access: yesTrudy VNIRO, 2022
Purpose: to characterize oceanographic conditions and their variability at various time scales within the walleye pollock area, including all Far Eastern seas of Russia, the Chukchi Sea, and the South Kuril and East Kamchatka regions.Methods: analysis of literary sources and data of expedition studies conducted by the Far Eastern branches of «VNIRO ...
A. S. Krovnin   +6 more
openaire   +1 more source

Tables and diagrams on trophology of walleye pollock in the western Bering Sea

open access: yesИзвестия ТИНРО, 2016
State of zooplankton, as the food base of walleye pollock, in the western Bering Sea in the early 21st century is considered. Warm period of the 2001-2006 changed to cold period of the 2007-2013 and, after the transitional year of 2014, a new warm period
Anatoly F. Volkov
doaj   +1 more source

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