Results 181 to 190 of about 44,758 (248)

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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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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Energy expenditures during reproduction by sockeye salmon (Oncorhynchus nerka)

Behaviour, 2003
From 1994 to 1996, behaviour and energy use by sockeye salmon spawning in Gluskie Creek, British Columbia, was investigated by a combination of behavioural observation and electromyogram (EMG) telemetry. The spawning life was 7.6 days for males and 10.6 days for females.
null Healey, null Hinch, null Lake
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Fine structure of the adenohypophysis in immature sockeye salmon, Oncorhynchus nerka

Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1973
The ultrastructure of the secretory cells of the adenohypophysis of juvenile sockeye salmon was investigated. Pituitary glands were collected from immature fish transferred experimentally to sea water and subsequently returned to fresh water. The rostral pars distalis contained three cell types: ACTH cells, prolactin cells, and non-secretory cells. The
B A, McKeown, J F, Leatherland
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Genetic Analysis of Oncorhynchus Nerka : Life History and Genetic Analysis of Redfish Lake Oncorhynchus Nerka, 1993-1994 Completion Report.

1994
The study has shown through life history examination and DNA analysis that three forms of O. nerka are present in Redfish Lake. The three forms are closely related, but may be sufficiently different to be considered three separate stocks. Fishhook Creek kokanee are temporally isolated from the beach spawners, and may represent the gene pool most ...
E.L. Brannon, G.H. Thorgaard, S.A. Cummings   +2 more
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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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Sex Ratios in Sockeye Salmon (Oncorhynchus nerka)

Journal of the Fisheries Research Board of Canada, 1954
A low male:female ratio (average for 14 years—32.4% males) occurs in the sockeye salmon spawning escapements to Cultus Lake. Factors likely to cause such unequal sex representation are examined. Sex ratios of seaward-migrating smolts (7 years' records) were found to approximate 50:50. Selection of male fish by the gill-net fishery, while contributing,
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Biogeographic Implications of Cytochrome b Sequences and Allozymes in Sockeye (Oncorhynchus nerka)

Journal of Heredity, 1995
Nucleotide sequence and restriction site analyses of the cytochrome b gene of mitochondrial DNA revealed three relatively common haplotypes among sockeye salmon (N = 80) from eight populations representing four major drainages from Kamchatka (Russia), Alaska, and British Columbia.
J W, Bickham, C C, Wood, J C, Patton
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The mate-guarding behaviour of male kokanee oncorhynchus nerka

Behaviour, 2002
AbstractThe patterns of mate-guarding in kokanee (non-anadromous Oncorhynchus nerka) are analysed and discussed in relation to existing theory of precopulatory mate-guarding. Male salmon typically guard females prior to spawning events and aggressively exclude other males from their vicinity.
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Sequence analysis of MHC class I α2 from sockeye salmon (Oncorhynchus nerka)

Fish & Shellfish Immunology, 2011
Most studies assessing adaptive MHC diversity in salmon populations have focused on the classical class II DAB or DAA loci, as these have been most amenable to single PCR amplifications due to their relatively low level of sequence divergence. Herein, we report the characterization of the classical class I UBA α2 locus based on collections taken ...
Erin K, McClelland, Tobi J, Ming, Amy, Tabata, Kristina M, Miller   +3 more
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