Homing and spawning site selection by sockeye salmon (Oncorhynchus nerka) in Iliamna Lake, Alaska

1991 ◽  
Vol 69 (1) ◽  
pp. 176-181 ◽  
Author(s):  
Gregory R. Blair ◽  
Thomas P. Quinn
Keyword(s):  
Site Selection ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Release Site ◽  
Reproductive Condition ◽  
Spawning Site ◽  
Factors Influencing ◽  
Capture Site ◽  
Site Characteristics ◽  
Ultrasonic Transmitters

Sockeye salmon (Oncorhynchus nerka) spawn along several island beaches and nearby streams in the eastern portion of Iliamna Lake, Alaska. We investigated the importance of homing, attraction to spawning site characteristics, and attraction to conspecifics in similar reproductive condition as factors influencing spawning site selection. Sockeye were displaced reciprocally between two similar island beaches and a dissimilar nearby stream. Few sockeye successfully homed from one beach to another (11%); those displaced to the stream from a beach displayed intermediate homing (24%) and the best homing was back to the stream (65%). More fish remained at the release site when it was similar to the capture site (25%) than when it was dissimilar (4%). Sockeye that left the release site for a beach were more often missing (68%) than those departing for the creek (30%). The use of ultrasonic transmitters revealed that four of six sockeye that departed for a beach were relocated at a spawning beach other than the capture site. Spawning site characteristics apparently play a role in spawning site selection, but the need to spawn at the capture site was more important. Homing was better to the creek, presumably because it had a unique odor and its flow made it easier to locate than the beaches.

Freshwater and marine migration and survival of endangered Cultus Lake sockeye salmon (Oncorhynchus nerka) smolts using POST, a large-scale acoustic telemetry array

2009 ◽  
Vol 66 (5) ◽  
pp. 736-750 ◽  
Author(s):  
David W. Welch ◽  
Michael C. Melnychuk ◽  
Erin R. Rechisky ◽  
Aswea D. Porter ◽  
Melinda C. Jacobs ◽  
...  
Keyword(s):  
Sockeye Salmon ◽  
Large Scale ◽  
Oncorhynchus Nerka ◽  
Exit Time ◽  
Survival Rates ◽  
Release Site ◽  
Fraser River ◽  
Continental Scale ◽  
Marine Migration ◽  
Post Array

Freshwater and early marine migration and survival of endangered Cultus Lake sockeye ( Oncorhynchus nerka ) salmon were studied using the Pacific Ocean Shelf Tracking (POST) array. Smolts were acoustically tagged in 2004–2007, and their migration was recorded within the lower Fraser River and coastal southern British Columbia waters. Most smolts showed rapid directional movement (swimming speeds of ~15–30 km·day–1). Average exit time from the Fraser River was 4.0–5.6 days after release, and average residence time within the Strait of Georgia was 25.6–34.1 days. Most individuals migrated northward, generally close to the mainland coast. Survival rates, assessed using standard mark–recapture methods, were generally high during the downstream migration (50%–70%), except in 2005 when survival was <20%, possibly because of a late release. Marine survival rates were stable among years, between 10%–30% at a subarray sited 500 km away from the release site. Movement rates were similar to those of previously published work, but the POST array provided direct measurements of movement and estimates of survival and demonstrated the feasibility of establishing continental-scale acoustic arrays for management and conservation of marine species.

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

Tradeoffs between homing and habitat quality for spawning site selection by hatchery-origin Chinook salmon

2012 ◽  
Vol 96 (1) ◽  
pp. 109-122 ◽  
Author(s):  
Jeremy M. Cram ◽  
Christian E. Torgersen ◽  
Ryan S. Klett ◽  
George R. Pess ◽  
Darran May ◽  
...  
Keyword(s):  
Habitat Quality ◽  
Chinook Salmon ◽  
Site Selection ◽  
Spawning Site
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