SOCKEYE SALMON ONCORHYNCHUS NERKA (WALBAUM) FROM THE NORTH-EASTERN CONTINENTAL COAST OF THE OKHOTSK SEA

2019 ◽  
pp. 49-58
Author(s):  
V.V. Volobuev ◽  
◽  
M.N. Gorokhov ◽  
I.S. Golovanov ◽  
L.L. Khovanskaya ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Okhotsk Sea ◽  
The North ◽  
Continental Coast ◽  
North Eastern

Inferring sockeye salmon (Oncorhynchus nerka) population dynamics and water quality changes in a stained nursery lake over the past ∼500 years

2004 ◽  
Vol 61 (7) ◽  
pp. 1235-1246 ◽  
Author(s):  
Irene Gregory-Eaves ◽  
Bruce P Finney ◽  
Marianne SV Douglas ◽  
John P Smol
Keyword(s):  
Population Dynamics ◽  
Sockeye Salmon ◽  
Environmental Changes ◽  
Oncorhynchus Nerka ◽  
The Past ◽  
The North ◽  
Salmon Population ◽  
High Concentrations ◽  
The North Pacific ◽  
Multiproxy Approach

Historical and paleolimnological studies have demonstrated that environmental changes in the North Pacific can strongly affect sockeye salmon (Oncorhynchus nerka) abundances. Whether these marine shifts would be influential on sockeye salmon from all lake types, however, has not yet been studied. This study represents the first paleolimnological analysis of past sockeye salmon population dynamics in a stained nursery lake (Packers Lake, Alaska). We adopted a multiproxy approach to determine whether salmon-derived nutrients (inferred from δ15N) would be available for algal uptake (inferred from the diatom species responses) in this stained lake, as high concentrations of humics and iron are known to sequester phosphorus. The strong degree of coherency between δ15N and diatoms, however, suggests that salmon-derived nutrients were bioavailable and enhanced productivity. Overall, our indicators responded to changes in sockeye salmon abundances and volcanic ashfalls over the past ∼500 years. In a section of the core unaffected by tephras (AD ∼1770–1882), our record suggests that the number of sockeye salmon spawners fluctuated widely. Comparison of temporal shifts in inferred sockeye salmon abundances from Packers Lake with other clearwater nursery lakes reveals a broadly consistent pattern, likely influenced by past climatic changes.

Thermal limits and ocean migrations of sockeye salmon (Oncorhynchus nerka): long-term consequences of global warming

1998 ◽  
Vol 55 (4) ◽  
pp. 937-948 ◽  
Author(s):  
D W Welch ◽  
Y Ishida ◽  
K Nagasawa
Keyword(s):  
Pacific Ocean ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Step Function ◽  
Thermal Limits ◽  
The North ◽  
The Pacific ◽  
Different Temperatures ◽  
The Pacific Ocean

Ocean surveys show that extremely sharp thermal boundaries have limited the distribution of sockeye salmon (Oncorhynchus nerka) in the Pacific Ocean and adjacent seas over the past 40 years. These limits are expressed as a step function, with the temperature defining the position of the thermal limit varying between months in an annual cycle. The sharpness of the edge, the different temperatures that define the position of the edge in different months of the year, and the subtle variations in temperature with area or decade for a given month probably all occur because temperature-dependent metabolic rates exceed energy intake from feeding over large regions of otherwise acceptable habitat in the North Pacific. At current rates of greenhouse gas emissions, predicted temperature increases under a doubled CO2 climate are large enough to shift the position of the thermal limits into the Bering Sea by the middle of the next century. Such an increase would potentially exclude sockeye salmon from the entire Pacific Ocean and severely restrict the overall area of the marine environment that would support growth.

Fishes from the North-Eastern Sea of Japan and the Okhotsk Sea off Hokkaido, Edits

Copeia ◽  
1983 ◽  
Vol 1983 (4) ◽  
pp. 1112 ◽  
Author(s):  
D. M. Cohen ◽  
K. Amaoka ◽  
K. Nakaya ◽  
H. Araya ◽  
T. Yasui
Keyword(s):  
Sea Of Japan ◽  
Okhotsk Sea ◽  
The North ◽  
North Eastern

scholarly journals NEMATODES OF GENUS PHILONEMA (PHILONEMIDAE) FROM SOCKEYE SALMON AND WHITESPOTTED CHAR FROM LAKE KISI (OLA RIVER BASIN, OKHOTSK SEA)

2019 ◽  
Vol 197 ◽  
pp. 194-207
Author(s):  
V. V. Pospekhov ◽  
K. V. Kusenko
Keyword(s):  
River Basin ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Nematode Species ◽  
Northern Coast ◽  
Okhotsk Sea ◽  
North East ◽  
Salvelinus Leucomaenis ◽  
First Time

Morphology of phylonems infesting whitespotted char Salvelinus leucomaenis and sockeye salmon Oncorhynchus nerka in Lake Kisi at the northern coast of the Okhotsk Sea is described for the first time. Sockeye was infected with adults of Philonema oncorhynchi Kuitunen-Ekbaum, 1933 and larvae of other nematode species (Philonema sp. II), and char — with adult dracunculoid nematode designated as Philonema sp. I. This Philonema sp. I differs considerably from Ph. oncorhynchi by number of reproductive papillae, their distribution, and structure of cuticular appendices on the caudal end of males. Larvae of Philonema sp. I (1st stage) and Philonema sp. II (3rd stage) are described, as well. These new data allow to reconsider the species belonging of nematodes infesting chars (Salvelinus) in North-East of Russia, which are identified now mostly as Ph. oncorhynchi.

The origin and genetic divergence of “black” kokanee, a novel reproductive ecotype of Oncorhynchus nerka

2015 ◽  
Vol 72 (10) ◽  
pp. 1584-1595 ◽  
Author(s):  
Amanda L. Moreira ◽  
Eric B. Taylor
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Parallel Evolution ◽  
Early Spring ◽  
Sympatric Populations ◽  
Body Depth ◽  
The North ◽  
Gill Raker ◽  
Maximum Body ◽  
Two Populations

Kokanee and sockeye salmon are the freshwater-resident and anadromous forms, respectively, of Oncorhynchus nerka. Unique populations of “black” kokanee are found in Lake Saiko, Japan, and in Anderson and Seton lakes in the southwestern interior of British Columbia. They are distinct from other populations of O. nerka in that black kokanee display black nuptial colouration and they spawn between 20 to 70 m below the surface of lakes in the winter or early spring. Analysis of mitochondrial DNA and nine microsatellite loci supported the hypothesis that black kokanee in Lake Saiko and in Anderson and Seton lakes have had a diphyletic origin resulting from at least two episodes of divergence in the North Pacific basin. Further, black kokanee in the Anderson and Seton lakes system were genetically distinct from sympatric populations of sockeye salmon in Gates and Portage creeks (inlets to Anderson and Seton lakes, respectively) and were distinct from one another. Anderson and Seton lake black kokanee differed dramatically from one another in standard length at maturity, but no differences were found between the two populations in size-adjusted maximum body depth or in gill raker numbers. Independent origins of black kokanee represent novel diversity within O. nerka, are consistent with the importance of parallel evolution in the origin of biodiversity, and suggest that independent management regimes are required for the persistence of black kokanee biodiversity within a physically interconnected lake system.

Ldh-4 allozyme variability in North American sockeye salmon (Oncorhynchus nerka) populations

1985 ◽  
Vol 63 (12) ◽  
pp. 2924-2932 ◽  
Author(s):  
R. E. Withler
Keyword(s):  
North American ◽  
Significant Variation ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Allozyme Variation ◽  
Ratio Analysis ◽  
The North ◽  
Geographic Regions ◽  
Skeena River ◽  
River Drainages

Allozyme variation at the Ldh-4 locus was surveyed in 66 populations of sockeye salmon (Oncorhynchus nerka) over the North American range of this species. Two alleles, Ldh-4100 and Ldh-4115, were present in populations over the species range, but frequencies of the Ldh-4115 allele exceeding 5% were restricted to some populations in northern British Columbia and Alaska. Ldh-485 present at frequencies less than 10%, was virtually confined to populations of the Skeena River drainage. Likelihood ratio analysis revealed significant variation in Ldh-4 allelic frequencies among major geographic regions, among smaller areas within regions, and among populations within the Nass and Stikine River drainages. Selective and zoogeographic factors which may explain the distribution of the Ldh-4115 allele in North American sockeye populations are discussed.

On the Distribution of Young Sockeye Salmon (Oncorhynchus nerka) in Babine and Nilkitkwa Lakes, B.C.

1956 ◽  
Vol 13 (5) ◽  
pp. 695-708 ◽  
Author(s):  
W. E. Johnson
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Fishing Effort ◽  
Lake Area ◽  
Parent Population ◽  
Unequal Distribution ◽  
The North ◽  
Limited Dispersal ◽  
Mean Size ◽  
Skeena River

Babine Lake and connected Nilkitkwa Lake, a total lake area of 174 square miles, provide nursery facilities for progeny of the largest sockeye salmon run to the Skeena River in northern British Columbia.Based on catch per unit of fishing effort, tow-net collections in August and October, 1955, indicate that at least 67%, and possibly as much as 88%, of the total age 0 sockeye population of these lakes (estimated as 50 to 60 million) was concentrated in Nilkitkwa Lake and the North Arm of Babine Lake: that is, in 11.4% of the total lake area. Mean size of young sockeye in these areas of concentration was much smaller than in the sparsely populated remainder of Babine Lake.This unequal distribution of young sockeye, and resulting inefficient utilization of the lake nursery facilities, is apparently a result of the distribution of the spawning parent population and a limited dispersal of young sockeye from their points of entrance into the lake as fry.

Discussion on “The grinding wheel and production” at the North-Eastern Section of the Institution

1942 ◽  
Vol 21 (8) ◽  
pp. 315
Author(s):  
Bowen ◽  
Vickery ◽  
Buchanan ◽  
Swallow ◽  
Perks ◽  
...  
Keyword(s):  
Grinding Wheel ◽  
The North ◽  
North Eastern

The influence of submesoscale eddies on hydrochemical parameters and structural and functional characteristics of phytoplankton in the north-eastern part of the Black Sea

2019 ◽  
pp. 24-40
Author(s):  
Sergey B. Kuklev ◽  
Vladimir A. Silkin ◽  
Valeriy K. Chasovnikov ◽  
Andrey G. Zatsepin ◽  
Larisa A. Pautova ◽  
...  
Keyword(s):  
Anticyclonic Eddy ◽  
The Black Sea ◽  
Hydrochemical Parameters ◽  
North East ◽  
The North ◽  
Seasonal Thermocline ◽  
North Eastern ◽  
Quantitative Indicators ◽  
The City ◽  
North Eastern Part

On June 7, 2018, a sub-mesoscale anticyclonic eddy induced by the wind (north-east) was registered on the shelf in the area of the city of Gelendzhik. With the help of field multidisciplinary expedition ship surveys, it was shown that this eddy exists in the layer above the seasonal thermocline. At the periphery of the eddy weak variability of hydrochemical parameters and quantitative indicators of phytoplankton were recorded. The result of the formation of such eddy structure was a shift in the structure of phytoplankton – the annual observed coccolithophores bloom was not registered.

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