Microsatellite DNA data indicate distinct native populations of kokanee, Oncorhynchus nerka, persist in the Lake Sammamish Basin, Washington

2004 ◽  
pp. 63-79
Author(s):  
Sewall F. Young ◽  
Mark R. Downen ◽  
James B. Shaklee
Keyword(s):  
Microsatellite Dna ◽  
Oncorhynchus Nerka ◽  
Native Populations

Microsatellite DNA variation in sockeye salmon Oncorhynchus nerka (Walbaum, 1792) populations of eastern Kamchatka

2013 ◽  
Vol 39 (4) ◽  
pp. 265-275
Author(s):  
O. A. Pilganchuk ◽  
N. Yu. Shpigalskaya ◽  
V. V. Savenkov ◽  
O. N. Saravansky ◽  
G. V. Bazarkin ◽  
...  
Keyword(s):  
Microsatellite Dna ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Dna Variation ◽  
Eastern Kamchatka

Genetic diversity of sockeye salmon Oncorhynchus nerka Walbaum of Kamchatka and the Commander Islands based on analysis of the variability of microsatellite DNA

2016 ◽  
Vol 43 (1) ◽  
pp. 12-20 ◽  
Author(s):  
S. D. Pavlov ◽  
E. V. Ponomareva ◽  
M. V. Kholodova ◽  
M. N. Melnikova ◽  
T. V. Mineeva
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Dna ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Commander Islands

Application of microsatellite DNA variation to estimation of stock composition and escapement of Nass River sockeye salmon (Oncorhynchus nerka)

1999 ◽  
Vol 56 (2) ◽  
pp. 297-310 ◽  
Author(s):  
Terry D Beacham ◽  
Chris C Wood
Keyword(s):  
Microsatellite Dna ◽  
Sockeye Salmon ◽  
Fishery Management ◽  
Pacific Salmon ◽  
Oncorhynchus Nerka ◽  
River Mouth ◽  
Large River ◽  
Allele Frequencies ◽  
Dna Variation ◽  
Mixed Stock

Spawning escapements of individual Pacific salmon stocks returning to remote spawning locations throughout large river systems can in theory be estimated by mixed-stock analysis of appropriately weighted samples from test fisheries near the river mouth. However, the feasibility of this approach has usually been limited by practical difficulties in identifying closely related populations within the same watershed. Microsatellite DNA techniques offer new promise for overcoming these limitations as illustrated for sockeye salmon (Oncorhynchus nerka) in the Nass River of northern British Columbia. Variation at six microsatellite DNA loci (Omy77, Ots3, Ots100, Ots103, Ots107, and Ots108) was surveyed from about 1400 fish from nine stocks in the Nass River drainage as well as from 249 fish in a test fishery conducted in the lower river during 1996. Five stocks were surveyed in more than one year, and variation in allele frequencies among stocks was, on average, about 10 times greater than annual variation within stocks. Allele frequencies of stocks where the juveniles do not rear in lakes ("riverine" or "sea type") were more similar to each other compared with frequencies from lake-rearing stocks. Significant differences in allele frequencies were observed among most stocks at all loci. About 4.5% of observed variation over all loci was attributable to stock differentiation. Simulated mixed-stock samples suggested that the six microsatellite DNA loci surveyed should provide the ability to provide relatively accurate and precise estimates of stock composition when utilized for fishery management applications. The estimated proportion of Meziadin Lake sockeye salmon in the 1996 test fishery was about 73%, in close agreement with an estimate derived from direct tagging of fish in the test fishery.

Variation in adult life history and morphology among Lake Washington sockeye salmon (Oncorhynchus nerka) populations in relation to habitat features and ancestral affinities

1997 ◽  
Vol 54 (1) ◽  
pp. 75-84 ◽  
Author(s):  
A P Hendry ◽  
T P Quinn
Keyword(s):  
Body Size ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
The Body ◽  
Age Composition ◽  
Body Depth ◽  
Native Populations ◽  
Lake Washington ◽  
Baker Lake ◽  
Different Origins

Body size, age composition, and male body depth were compared among five Lake Washington sockeye salmon (Oncorhynchus nerka) populations. Two of the populations (Bear and Cottage creeks) were indigenous to the watershed and three (Cedar River, Issaquah Creek, and Pleasure Point) were non-native (from Baker Lake, Washington). To isolate the relative contributions of habitat type and ancestral relatedness to phenotypic variation, we compared populations with (i) the same origin and similar habitats, (ii) different origins and different habitats, (iii) the same origin and different habitats, and (iv) different origins and similar habitats. Spawning salmon in the Cedar River were older and larger than those in the native populations, a result consistent with their origin (contemporary Baker Lake fish were also large and old) and with habitat variation (the Cedar River is much larger than Bear and Cottage creeks). Body size and age composition did not differ among the three non-native populations, but the body depth of males spawning on the lake beach (Pleasure Point) was greater than that of males in the Cedar River, suggesting adaptive divergence. Adaptive convergence may also have occurred because the population in Issaquah Creek (intermediate-sized creek) did not differ appreciably from those in Bear and Cottage creeks.

scholarly journals Extirpation of a native population following a stocking program: genetic population structure and demographics of kokanee (Oncorhynchus nerka) in a large impounded watershed

2021 ◽  
Author(s):  
◽  
Paige Wilson
Keyword(s):  
Population Structure ◽  
Condition Factor ◽  
North Pacific Ocean ◽  
Oncorhynchus Nerka ◽  
Temporal Trends ◽  
Fork Length ◽  
Genetic Population Structure ◽  
Age At Maturity ◽  
Genetic Population ◽  
Native Populations

Kokanee, the non-anadromous life history form of Oncorhynchus nerka, use lacustrine habitat in watersheds draining into the north Pacific Ocean. Kokanee have also been widely introduced into reservoirs following impoundment of rivers due to the construction of dams. Locally-adapted subpopulations of Kokanee, however, should be identified and evaluated when implementing watershed-level management strategies. In Chapter 1, I examined fork length, condition factor, and age at maturity for Kokanee in the Williston watershed of northern British Columbia to identify potential spatial and temporal trends in demographic structure following a large-scale stocking program that occurred in the 1990s. Adult spawning Kokanee that were native to the reservoir and collected prior to stocking events were significantly larger and maintained higher condition factors than Kokanee stocked from the Columbia River sampled in any year after 1991. Introduced Kokanee sampled in 2018 and 2019 were the smallest spawners and were significantly smaller than all fish collected between 1989 and 2018; the condition factors of these fish were also significantly lower than native Kokanee and the first spawning cohorts of Columbia-origin fish. The average age at maturity did not change across spatial or temporal scales (3 yrs.). My results indicate an ongoing trend of decreasing spawner size and condition factor for Kokanee in the Williston Reservoir since introduction events in the early 1990s. In Chapter 2, I analyzed the genetic population structure of Kokanee in the Williston watershed, including from the reservoir before stocking Columbia-origin fish and native populations from headwaters of the Williston Reservoir: Thutade, Arctic, and Tacheeda Lakes. Using microsatellite markers, I identified that all fish collected from 2006 to 2019 were introduced Columbia-origin genotypes, and there was no evidence of genetic divergence by spawning location. Native populations in Arctic and Tacheeda Lakes remained entirely separate from the reservoir populations, and there was no indication of past or current introgression with introduced stock. I identified that native Williston Reservoir Kokanee diverged from the Thutade Lake population; as native Williston fish have not been sampled since 2000, it is likely that this population has been extirpated in the reservoir by the successful Columbia-origin lineage. My results highlight an unfortunate consequence of underinformed management practices that failed to recognize the native Williston Kokanee as a distinct population. Strategies that incorporate knowledge of subpopulations of Williston watershed Kokanee, such as genetic populations or reproductive ecotypes, should be prioritized to conserve locally-adapted genetic diversity.

Polymorphism of microsatellite DNA sequences in dogs Russian toy terrier and German dog

2016 ◽  
Vol 18 (1) ◽  
pp. 27-32 ◽  
Author(s):  
V. Dzitsiuk ◽  
◽  
S. Kruhlyk ◽  
V. Spyrydonov ◽  
◽  
...  
Keyword(s):  
Dna Sequences ◽  
Microsatellite Dna
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