scholarly journals Ionoregulatory changes in different populations of maturing sockeye salmon Oncorhynchus nerka during ocean and river migration

2005 ◽  
Vol 208 (21) ◽  
pp. 4069-4078 ◽  
Author(s):  
J. M. Shrimpton
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Different Populations ◽  
River Migration

Biochemical Studies on Sockeye Salmon During Spawning Migration.: IX. Fat, Protein and Water in the Major Internal Organs and Cholesterol in the Liver and Gonads of the Standard Fish

1960 ◽  
Vol 17 (1) ◽  
pp. 113-122 ◽  
Author(s):  
D. R. Idler ◽  
I. Bitners
Keyword(s):  
Sockeye Salmon ◽  
Alimentary Tract ◽  
Oncorhynchus Nerka ◽  
The Body ◽  
Spawning Migration ◽  
Fraser River ◽  
Internal Organs ◽  
Male And Female ◽  
Biochemical Studies ◽  
River Migration

Absolute changes in fat, protein and water of all major internal organs and free and esterified cholesterol of the liver and gonads of standard male and female sockeye salmon (Oncorhynchus nerka) during the 1957 Fraser River spawning migration to Stuart Lake are discussed. The alimentary tract is the major source of fat and protein from the internal organs and the greater part of this reserve is expended in the first 250 miles (403 km) of the river migration. The testes consumed only 0.5% of the energy expended from the body of the standard male while the ovaries consumed 8% of the energy expended from the body of the standard female.

Physiological and molecular endocrine changes in maturing wild sockeye salmon, Oncorhynchus nerka, during ocean and river migration

2011 ◽  
Vol 182 (1) ◽  
pp. 77-90 ◽  
Author(s):  
A.-M. Flores ◽  
J. M. Shrimpton ◽  
D. A. Patterson ◽  
J. A. Hills ◽  
S. J. Cooke ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
River Migration

Maternal influence and population differences in activities of mitochondrial and glycolytic enzymes in emergent sockeye salmon (Oncorhynchus nerka) fry

2004 ◽  
Vol 61 (7) ◽  
pp. 1225-1234 ◽  
Author(s):  
D A Patterson ◽  
H Guderley ◽  
P Bouchard ◽  
J S Macdonald ◽  
A P Farrell
Keyword(s):  
Lactate Dehydrogenase ◽  
Enzyme Activities ◽  
Sockeye Salmon ◽  
Citrate Synthase ◽  
Oncorhynchus Nerka ◽  
Whole Body ◽  
Performance Requirement ◽  
Maternal Influences ◽  
Different Populations ◽  
Specific Activities

Full-sib groups were created from two reproductively isolated sockeye salmon (Oncorhynchus nerka) populations, Weaver and Gates creeks, to test the hypotheses that prefed, emergent fry from different populations have different energetic capacities as revealed by whole-body maximal enzyme activities and that maternal influences account for a large portion of the variability in enzyme activities within fry populations. Weaver fry had higher mass-specific activities for lactate dehydrogenase, citrate synthase, and cytochrome c oxidase as well as higher protein-specific activities of lactate dehydrogenase. We ascribed these higher enzyme activities to the associated performance requirement of a more difficult prefeeding fry migration for Weaver fry. There were significant differences in mass- and protein-specific enzyme activities for all three enzymes among maternal broodlines within each population, suggesting that genetic differences existed among families. This study of maximal enzyme activities in juvenile sockeye highlights the importance of maternal influences, potential adaptive significance of differences in metabolic capacity, and the need for examining cellular physiology in an ecological perspective.

Coastal marine and in-river migration behaviour of adult sockeye salmon en route to spawning grounds

2014 ◽  
Vol 496 ◽  
pp. 71-84 ◽  
Author(s):  
SM Wilson ◽  
SG Hinch ◽  
SM Drenner ◽  
EG Martins ◽  
NB Furey ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Spawning Grounds ◽  
Migration Behaviour ◽  
Coastal Marine ◽  
River Migration

Resumption of anadromy or straying? Origins of Sockeye Salmon Oncorhynchus nerka in the Elwha River

2021 ◽  
Author(s):  
Thomas P. Quinn ◽  
George R. Pess ◽  
Ben J.G. Sutherland ◽  
Samuel J. Brenkman ◽  
Ruth E. Withler ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Elwha River

Alternative Recruitment Models of Adams River Sockeye Salmon, Oncorhynchus nerka

1987 ◽  
Vol 44 (9) ◽  
pp. 1551-1561 ◽  
Author(s):  
Jeremy S. Collie ◽  
Carl J. Walters
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Status Quo ◽  
Management Policy ◽  
Best Management ◽  
Interaction Terms ◽  
Ricker Model ◽  
The Status ◽  
Stock Recruitment ◽  
High Yields

Despite evidence of depensatory interactions among year-classes of Adams River sockeye salmon (Oncorhynchus nerka), the best management policy is one of equal escapement for all year-classes. We fit alternative models (Ricker model and Larkin model) to 32 yr of stock–recruitment data and checked, using simulation tests, that the significant interaction terms in the Larkin model are not caused by biases in estimating the parameters. We identified a parameter set (Rationalizer model) for which the status quo cyclic escapement policy is optimal, but this set fits the observed data very poorly. Thus it is quite unlikely that the Rationalizer model is correct or that the status quo escapement policy is optimal. Using the fitted stock–recruitment parameters, we simulated the sockeye population under several management policies. The escapement policy optimal under the Ricker model is best overall because of the high yields if it should be correct. If the three stock–recruitment models are equally likely to be correct, the simulations predict that adopting a constant-escapement policy would increase long-term yield 30% over the current policy and that an additional 15% increase in yield could be obtained if the policy were actively adaptive.

Reduced growth in wild juvenile sockeye salmon Oncorhynchus nerka infected with sea lice

2017 ◽  
Vol 91 (1) ◽  
pp. 41-57 ◽  
Author(s):  
S. C. Godwin ◽  
L. M. Dill ◽  
M. Krkošek ◽  
M. H. H. Price ◽  
J. D. Reynolds
Keyword(s):  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Sea Lice

BIOCHEMICAL STUDIES ON SOCKEYE SALMON DURING SPAWNING MIGRATION: XII. LIVER GLYCOGEN

1960 ◽  
Vol 38 (1) ◽  
pp. 553-558 ◽  
Author(s):  
Violet M. Chang ◽  
D. R. Idler
Keyword(s):  
Sex Differences ◽  
Sockeye Salmon ◽  
Glycogen Content ◽  
Steroid Hormone ◽  
Liver Glycogen ◽  
Spawning Migration ◽  
Energy Expenditures ◽  
Liver Glycogen Content ◽  
Biochemical Studies ◽  
River Migration

Liver glycogen levels were determined for a pure stock of sockeye salmon (Oncorhynchus nerka) taken at three locations during spawning migration. The liver glycogen content of the male was found to be consistently greater than that of the female throughout the entire river migration. In both sexes liver glycogen decreased during the earlier phase of migration, but increased during the later stage so that the levels at the spawning grounds were approximately twice those at the mouth of the river. The changes which occur are discussed in relation to sex differences, energy expenditures, and plasma steroid hormone levels.

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