The Sodium, Potassium, and Water Content of the Flesh of Sockeye Salmon (Oncorhynchus nerka) in Relation to Sexual Development and Starvation

1967 ◽  
Vol 24 (2) ◽  
pp. 243-248 ◽  
Author(s):  
N. Tomlinson ◽  
J. R. McBride ◽  
S. E. Geiger
Keyword(s):  
Skeletal Muscle ◽  
Water Content ◽  
Sexual Development ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Spawning Migration ◽  
Natural Conditions ◽  
Sodium Potassium

The influence of feeding on the changes that occur in the skeletal muscle content of sodium, potassium, and water in sockeye salmon (Oncorhynchus nerka) during sexual development and spawning has been investigated. Feeding has little, if any, effect on the changes. Thus it appears that the period of starvation these fish undergo during their spawning migration under natural conditions is not the major cause of the degeneration of their skeletal muscle, but rather that these changes are associated in some manner with the development of the gonads, presumably through the mediation of hormones.

Biochemical Studies on Sockeye Salmon During Spawning Migration: XI. The Free Histidine Content of the Tissues

1960 ◽  
Vol 17 (3) ◽  
pp. 347-351 ◽  
Author(s):  
J. D. Wood ◽  
D. W. Duncan ◽  
M. Jackson
Keyword(s):  
Amino Acid ◽  
Sockeye Salmon ◽  
Alimentary Tract ◽  
Oncorhynchus Nerka ◽  
The Other ◽  
Spawning Migration ◽  
Fraser River ◽  
Initial Value ◽  
Spawning Grounds ◽  
Biochemical Studies

During the first 250 miles (400 km) of spawning migration of Fraser River sockeye salmon (Oncorhynchus nerka) the free histidine content of the muscle, alimentary tract, and head+skin+bones+tail decreased to a small fraction of the initial value. A further decrease occurred in the levels of this amino acid in the alimentary tract during the subsequent 415-mile (657-km) migration to the spawning grounds, no change being observed with the other tissues. Comparatively small changes in free histidine were found with heart, spleen, liver, kidney and gonads during migration.

An Acoustic Estimate of the Escapement of Sockeye Salmon (Oncorhynchus nerka) into Lake Washington in 1971

1974 ◽  
Vol 31 (2) ◽  
pp. 222-225 ◽  
Author(s):  
Richard E. Thorne ◽  
James J. Dawson
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Spawning Migration ◽  
Spawning Ground ◽  
Large Fish ◽  
Before And After ◽  
Lake Washington

The feasibility of estimating the escapement of sockeye salmon (Oncorhynchus nerka) into Lake Washington by hydroacoustics was explored during 1971. Surveys were made of large fish targets within the lake just before and after the spawning migration of sockeye salmon up the Cedar River. A decrease was observed after the spawning migration comparable to the estimated escapement as determined by weir counts and spawning ground surveys.

Xenobiotic metabolizing enzyme activity in sockeye salmon (Oncorhynchus nerka) during spawning migration

1992 ◽  
Vol 34 (1-4) ◽  
pp. 293-298 ◽  
Author(s):  
John M. Kennish ◽  
Reese A. Bolinger ◽  
Kent A. Chambers ◽  
Melinda L. Russell
Keyword(s):  
Enzyme Activity ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Spawning Migration ◽  
Metabolizing Enzyme

scholarly journals Physiology of individual late-run Fraser River sockeye salmon (Oncorhynchus nerka) sampled in the ocean correlates with fate during spawning migration

2006 ◽  
Vol 63 (7) ◽  
pp. 1469-1480 ◽  
Author(s):  
Steven J Cooke ◽  
Scott G Hinch ◽  
Glenn T Crossin ◽  
David A Patterson ◽  
Karl K English ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Acute Stress ◽  
Oncorhynchus Nerka ◽  
Spawning Migration ◽  
Fraser River ◽  
Stress Indicators ◽  
Spawning Areas ◽  
Plasma Estradiol ◽  
Somatic Energy ◽  
Estradiol Levels

Beginning in 1995, segments of the late-run sockeye salmon (Oncorhynchus nerka) stocks from the Fraser River, British Columbia, have initiated upriver spawning migration up to 6 weeks earlier than historical records; and those fish have experienced high rates of en route mortality. We examined the correlations between physiological and energetic status prior to river entry with subsequent migratory performance of individual salmon using telemetry and noninvasive biopsies for Adams–Thompson–Shuswap (Adams) and Weaver–Harrison (W–H) stocks. Salmon that failed to reach the river were characterized by a tendency to have elevated levels of chronic and acute stress indicators. For one stock of fish (i.e., Adams) that entered the river, those that died before reaching spawning grounds were individuals with low gross somatic energy. Furthermore, females tended to have elevated plasma estradiol levels. When contrasting fish with different behaviours and fates, fish that did not hold in the estuary and subsequently died tended to have less energy than fish that held and reached spawning areas. Females from the former group also had higher 11-ketotestosterone and estradiol levels relative to those from the later group. These data suggest that differences in physiological and energetic status may be associated with high en route mortality in late-run sockeye salmon.

Biochemical Studies on Sockeye Salmon During Spawning Migration. V. Cholesterol, Fat, Protein and Water in the Body of the Standard Fish

1959 ◽  
Vol 16 (2) ◽  
pp. 235-241 ◽  
Author(s):  
D. R. Idler ◽  
I. Bitners
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
The Body ◽  
Spawning Migration ◽  
Sampling Station ◽  
Entire Body ◽  
Fraser River ◽  
Spawning Grounds ◽  
Male And Female ◽  
Biochemical Studies

The absolute changes in fat, protein, water and free and esterified cholesterol for the entire body of standard male and female sockeye salmon (Oncorhynchus nerka) during the Fraser River spawning migration are discussed.The data were obtained for twelve groups of males and twelve groups of females, totalling 216 fish. The fish were caught at three locations: before entering the river, 250 miles up the river, and at one of the spawning grounds 715 miles from the first sampling station.

The Relation of Lake Population Density to Size of Young Sockeye Salmon (Oncorhynchus nerka)

1944 ◽  
Vol 6c (3) ◽  
pp. 267-280 ◽  
Author(s):  
R. E. Foerster
Keyword(s):  
Population Density ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Inverse Correlation ◽  
Fish Populations ◽  
Production Level ◽  
Natural Conditions ◽  
Significant Inverse Correlation ◽  
Appreciable Increase

For Cultus lake, B.C., data concerning relative numbers of young sockeye inhabiting the lake each year were obtained from the count of seaward migrants. From samples of the latter the sizes of the migrants were determined. For all years, 1927–1937, a statistically significant inverse correlation of −0.815 existed between extent of lake population and size of migrants. Under natural conditions the lake's sockeye productivity seems limited, probably due to limited plankton crop, and the sockeye values obtained in each year are compared to a production level of 6,000–8,000 kg. Experiments in reducing predaceous fish populations indicate appreciable increase in sockeye production.

Transcriptomics of environmental acclimatization and survival in wild adult Pacific sockeye salmon (Oncorhynchus nerka) during spawning migration

2011 ◽  
Vol 20 (21) ◽  
pp. 4472-4489 ◽  
Author(s):  
TYLER G. EVANS ◽  
EDD HAMMILL ◽  
KARIA KAUKINEN ◽  
ANGELA D. SCHULZE ◽  
DAVID A. PATTERSON ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Spawning Migration
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