Results 181 to 190 of about 15,838 (222)

Acidification severely suppresses spawning of hime salmon (land-locked sockeye salmon, Oncorhynchus nerka)

Aquatic Toxicology, 2000
A laboratory study was conducted to investigate the effects of an acidic environment on the female sexual behavior of hime salmon (land-locked sockeye salmon, Oncorhynchus nerka). Spawning hime salmon were extremely sensitive to the acidity of ambient water.
S, Kitamura, K, Ikuta
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Corroboration of a Bioenergetics Model for Sockeye Salmon

Transactions of the American Fisheries Society, 1989
Abstract We constructed a bioenergetics model for sockeye salmon Oncorhynchus nerka and evaluated its sensitivity to parameter error. When used to predict annual growth, the model was most sensitive, in declining order of importance. to changes in the intercept of the dependence of consumption on body weight, the proportion of maximum consumption, the ...
David A. Beauchamp, Donald J. Stewart, G. L. Thomas   +2 more
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Vertebral Abnormalities in Sockeye, Pink, and Chum Salmon

Transactions of the American Fisheries Society, 1966
Abstract Radiographs of vertebral structures of 10,377 sockeye, 4,403 chum, and 4,777 pink salmon collected in 1958 to 1962 were examined to determine the frequency of occurrence of abnormal vertebrae in wild populations of mature Pacific salmon. Various types of deviations from the orderly processes of development or segmentation that resulted in ...
Charles D. Gill, Donald M. Fisk
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Osmoregulatory capability in juvenile sockeye salmon (Oncorhynchus nerka)

Canadian Journal of Zoology, 1971
The osmoregulatory capability of sockeye salmon (Oncorhynchus nerka) embryos and fry was tested at weekly intervals by exposing them for 5 days to seawater with a salinity of 29‰. Juveniles that survived the 5-day test were considered to be euryhaline.
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Liver arginase activity in the sockeye salmon, Oncorhynchus nerka

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1971
Abstract 1. 1. Liver arginase levels in adult sockeye salmon show characteristics similar to that of higher animals. 2. 2. Results show that sockeye liver arginase has a pH optimum of 9·5, is partially dependent on Mn2+ ions and has a temperature optimum of 45°C.
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Sounding Response of the Kokanee and Sockeye Salmon

Journal of the Fisheries Research Board of Canada, 1968
When frightened, sockeye and kokanee salmon dive into deeper waters. This is termed the "sounding response."The sounding response in these fish is accompanied by the expulsion of gas from the swimbladder via the pneumatic duct. This gas loss is active and results from the contraction of the circular muscle fibers in the wall of the swimbladder.Gas loss
H. H. Harvey, W. S. Hoar, C. R. Bothern
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Activity and behaviour in spawning sockeye salmon

2009
Total energy expenditures and muscle activity have been measured in spawning salmon but behaviour specific energy-use has never been been measured directly. This research used electromyogram (EMG) telemetry, combined with behaviour observations to assess activity levels and estimate relative energy use during spawning in sockeye salmon, Oncorhynchus ...
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Photoperiodic activity changes in juvenile sockeye salmon (Oncorhynchus nerka)

Canadian Journal of Zoology, 1971
Spontaneous locomotor activity was studied in juvenile sockeye salmon under controlled environmental conditions (LD 9.5:14.5 or 12:12; 5 °C; 0.1–34.4 lux). Siblings were hatched in activity chambers and swimming movements were monitored with an ultrasonic system for 11 months.
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The Skeena River Salmon Fishery, with Special Reference to Sockeye Salmon

Journal of the Fisheries Research Board of Canada, 1955
The general history of the Skeena River commercial salmon fishery is presented from 1877 to 1948. The changes in fishing areas, seasons and fishing methods are described, together with the trends in the catches obtained. The most accurate data pertain to the important sockeye salmon gill-net fishery.
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Some Scale Characters of the Ozernaya Sockeye Salmon

Journal of the Fisheries Research Board of Canada, 1966
not available
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