Hydroacoustic Estimates of Adult Sockeye Salmon (Oncorhynchus nerka) in Lake Washington, 1972–75

1979 ◽  
Vol 36 (9) ◽  
pp. 1145-1149 ◽  
Author(s):  
Richard E. Thorne
Keyword(s):  
Key Words ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Target Strength ◽  
Spawning Ground ◽  
Resident Fish ◽  
Lake Washington ◽  
Visual Observations

Hydroacoustic techniques were used on Lake Washington from 1972 to 1975 to estimate the potential escapement of sockeye salmon (Oncorhynchus nerka). Target strength measurements were used to establish a threshold which would separate the larger adult sockeye salmon from smaller resident fish. The acoustic estimates of escapement were very similar to those obtained from visual observations at the Hiram M. Chittenden ship canal locks, observations on the Cedar River, and spawning ground surveys. Key words: hydroacoustic, acoustic, methodology, sockeye salmon, escapement

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.

Estimating Stock Composition of Migrating Juvenile Fraser River (British Columbia) Sockeye Salmon, Oncorhynchus nerka, Using Parasites as Natural Tags

1988 ◽  
Vol 45 (4) ◽  
pp. 586-591 ◽  
Author(s):  
R. E. Bailey ◽  
L. Margolis ◽  
C. Groot
Keyword(s):  
British Columbia ◽  
Maximum Likelihood ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Fraser River ◽  
Dominant Group ◽  
Strait Of Georgia ◽  
Natural Tags ◽  
Lake Washington ◽  
The Individual

Simulated mixtures of juvenile sockeye salmon (Oncorhynchus nerka) were constructed using parasite data to represent proportionally the major component stocks of Fraser River and Lake Washington sockeye migrating within the Strait of Georgia, British Columbia, in 1982–84. Samples of migrating juveniles were also collected from Bedwell Harbour, South Pender Island, British Columbia, each year and analyzed for parasites and stock composition. The compositions of simulated and sample mixtures were estimated using a maximum likelihood stock composition model. Simulated mixture compositions were accurately estimated for most stocks for all year-classes. When significant misassignment occurred between stocks, the stocks were analyzed as a complex using the allocate-sum procedure. Sample mixture estimates correctly identified the dominant stock for each year-class, although for 1984 the dominant group was determined as a complex of three stocks because the individual stocks were not distinguishable. The results indicate that it is feasible to use parasites as natural tags to estimate stock compositions of migrating juvenile sockeye salmon in the Strait of Georgia.

Immersion Vaccination of Sockeye Salmon (Oncorhynchus nerka) with Two Pathogenic Strains of Vibrio anguillarum

1979 ◽  
Vol 36 (2) ◽  
pp. 222-225 ◽  
Author(s):  
R. W. Gould ◽  
R. Antipa ◽  
D. F. Amend
Keyword(s):  
Key Words ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Vibrio Anguillarum ◽  
Type I ◽  
Type Ii ◽  
Monovalent Vaccine ◽  
Homologous Challenge

Sockeye salmon (Oncorhynchus nerka) were immersion-vaccinated in suspensions containing 5 × 107, 5 × 106, 5 × 105, or 5 × 104 bacteria/mL of bivalent or monovalent, formalin-killed Vibrio anguillarum, Types I and II. The fish were split into two lots and held for 54 d. At that time one lot was challenged with living, virulent V. anguillarum, Type I, and one with living, virulent V. anguillarum, Type II. Immunization with bivalent bacterin effectively protected the fish from vibriosis, but monovalent vaccine was effective only against the homologous challenge. Immunization with the highest concentration of Type I monovalent bacterin resulted in 0% Type I and 58% Type II challenge mortality. Immunization with the highest concentration of Type II monovalent bacterin resulted in 41% Type I and 0% Type II challenge mortality. Immunization with the highest concentration of bivalent Type I/Type II bacterin resulted in 2% mortality in both challenges. Protective bacterins were effective at concentrations down to 5 × 105 bacteria/mL. Key words: immersion vaccination, bivalent vaccines, Vibrio anguillarum, vibriosis

Sex differences in circulatory oxygen transport parameters of sockeye salmon (Oncorhynchus nerka) on the spawning ground

2009 ◽  
Vol 179 (5) ◽  
pp. 663-671 ◽  
Author(s):  
Timothy Darren Clark ◽  
S. G. Hinch ◽  
B. D. Taylor ◽  
P. B. Frappell ◽  
A. P. Farrell
Keyword(s):  
Sex Differences ◽  
Oxygen Transport ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Spawning Ground ◽  
Transport Parameters

Evidence for the existence of a native population of sockeye salmon (Oncorhynchus nerka) and subsequent introgression with introduced populations in a Pacific Northwest watershed

2007 ◽  
Vol 64 (9) ◽  
pp. 1209-1221 ◽  
Author(s):  
Ingrid B Spies ◽  
Eric C Anderson ◽  
Kerry Naish ◽  
Paul Bentzen
Keyword(s):  
Pacific Northwest ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Past Century ◽  
The Past ◽  
Introduced Populations ◽  
Microsatellite Dna Markers ◽  
Lake Washington ◽  
Baker Lake ◽  
Bear Creek

The Lake Washington watershed (Washington, USA) has been the recipient of numerous transplantations of nonnative Oncorhynchus nerka (both sockeye salmon and their landlocked form, kokanee) over the past century and currently contains self-sustaining populations of both ecotypes. Microsatellite DNA markers were used to identify native and introduced groups while characterizing population structure. This study confirmed that Baker Lake sockeye transplantations during the 20th century contributed to three current sockeye populations: Cedar River, Issaquah Creek, and Pleasure Point Beach in the Lake Washington watershed. Distinctive allele distributions at two loci, One101 and One114, provide evidence that a fourth Lake Washington sockeye population, Bear Creek, is divergent from other Lake Washington sockeye and may be of substantially native origin despite heavy stocking activity in the watershed over the past century. Data from these loci also suggest the presence of native genes in populations that had been regarded as entirely of introduced origin.

Incubation temperature, developmental biology, and the divergence of sockeye salmon (Oncorhynchus nerka) within Lake Washington

1998 ◽  
Vol 55 (6) ◽  
pp. 1387-1394 ◽  
Author(s):  
Andrew P Hendry ◽  
Jay E Hensleigh ◽  
Reg R Reisenbichler
Keyword(s):  
Sockeye Salmon ◽  
Incubation Temperature ◽  
Oncorhynchus Nerka ◽  
Absolute Magnitude ◽  
Adaptive Divergence ◽  
Evolutionary Divergence ◽  
Developmental Variation ◽  
Development Rates ◽  
Lake Washington ◽  
In The Wild

Sockeye salmon (Oncorhynchus nerka) introduced into Lake Washington in the 1930s and 1940s now spawn at several different sites and over a period of more than 3 months. To test for evolutionary divergence within this derived lineage, embryos that would have incubated in different habitats (Cedar River or Pleasure Point Beach) or at different times (October, November, or December in the Cedar River) were reared in the laboratory at 5, 9, and 12.5°C. Some developmental variation mirrored predictions of adaptive divergence: (i) survival at 12.5°C was highest for embryos most likely to experience such temperatures in the wild (Early Cedar), (ii) development rate was fastest for progeny of late spawners (Late Cedar), and (iii) yolk conversion efficiency was matched to natural incubation temperatures. These patterns likely had a genetic basis because they were observed in a common environment and could not be attributed to differences in egg size. The absolute magnitude of divergence in development rates was moderate (Late Cedar embryos emerged only 6 days earlier at 9°C) and some predictions regarding development rates were not supported. Nonetheless our results provide evidence of adaptive divergence in only 9-14 generations.

Natural otolith microstructure patterns reveal precise homing to natal incubation sites by sockeye salmon (Oncorhynchus nerka)

1999 ◽  
Vol 77 (5) ◽  
pp. 766-775 ◽  
Author(s):  
Thomas P Quinn ◽  
Eric C Volk ◽  
Andrew P Hendry
Keyword(s):  
Life Histories ◽  
Sockeye Salmon ◽  
Spatial Scales ◽  
Oncorhynchus Nerka ◽  
Early Life History ◽  
Island Population ◽  
Otolith Microstructure ◽  
River Population ◽  
Thermal Regimes ◽  
Lake Washington

Experimental results suggest that anadromous salmon and trout learn (imprint) the odors of their natal site just prior to or during seaward migration. In contrast, information on the life histories of several species and the genetic structure of populations indicate that they must imprint earlier in life, probably during incubation in the gravel or when they emerge as free-swimming fry. To test the hypothesis that sockeye salmon (Oncorhynchus nerka) home to their incubation-emergence sites (rather than just to the lake where they reared before migrating to sea), we took advantage of the natural variation in otolith microstructure caused by differences in thermal regimes during incubation. We collected otoliths from adult sockeye salmon that returned to discrete spawning areas in Iliamna Lake, Alaska, and Lake Washington, Washington, and, in blind trials, these were classified based on comparison with otoliths from juveniles from the same sites and using information on site-specific thermal regimes. Our analysis showed that the salmon were much more likely to return to their natal incubation site than would have occurred by chance. Estimated straying rates were about 0.1% from the Woody Island population to the Pedro Pond population in Iliamna Lake and about 1% from the Cedar River population to the Pleasure Point population in Lake Washington. The results were consistent with genetic evidence for fine-scale structure of salmon populations and with conservation based on spatial scales appropriate for the early life history of the fish.

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