scholarly journals Y‐chromosome haplotypes are associated with variation in size and age at maturity in male Chinook salmon

2020 ◽  
Vol 13 (10) ◽  
pp. 2791-2806
Author(s):  
Garrett J. McKinney ◽  
James E. Seeb ◽  
Carita E. Pascal ◽  
Daniel E. Schindler ◽  
Sara E. Gilk‐Baumer ◽  
...  
Keyword(s):  
Y Chromosome ◽  
Chinook Salmon ◽  
Age At Maturity

scholarly journals Y-chromosome haplotypes are associated with variation in size and age at maturity in male Chinook salmon

2019 ◽  
Author(s):  
Garrett J. McKinney ◽  
James E Seeb ◽  
Carita E. Pascal ◽  
Daniel E. Schindler ◽  
Sara E. Gilk-Baumer ◽  
...  
Keyword(s):  
Life History ◽  
Reproductive Success ◽  
Y Chromosome ◽  
Chinook Salmon ◽  
Egg Quality ◽  
Haplotype Diversity ◽  
Wide Distribution ◽  
Size At Maturity ◽  
Age At Maturity ◽  
Increased Risk

ABSTRACTVariation in size and age at maturity is an important component of life history that is influenced both by environmental and genetic factors. In salmonids, large size confers a direct reproductive advantage through increased fecundity and egg quality in females, while larger males gain a reproductive advantage by monopolizing access to females. In addition, variation in size and age at maturity in males can be associated with different reproductive strategies; younger smaller males may gain reproductive success by sneaking in among mating pairs. In both sexes there is a trade-off between older age and increased reproductive success and increased risk of mortality by delaying reproduction. We identified four Y-chromosome haplogroups that showed regional and population-specific variation in frequency using RADseq data for 21 populations of Alaska Chinook salmon. We then characterized the range-wide distribution of these haplogroups using GT-seq assays. These haplogroups exhibited associations with size at maturity in multiple populations suggesting that the lack of recombination between X and Y-chromosomes has allowed Y-chromosome haplogroups to capture different alleles that influence size at maturity. Ultimately, conservation of life history diversity in Chinook salmon may require conservation of Y-chromosome haplotype diversity.

Changes in life history parameters in a naturally spawning population of chinook salmon (Oncorhynchus tshawytscha) associated with releases of hatchery-reared fish

1997 ◽  
Vol 54 (6) ◽  
pp. 1235-1245 ◽  
Author(s):  
M J Unwin ◽  
G J Glova
Keyword(s):  
Life History ◽  
New Zealand ◽  
Chinook Salmon ◽  
Life History Traits ◽  
Oncorhynchus Tshawytscha ◽  
Fork Length ◽  
Age At Maturity ◽  
Natural Origin ◽  
Parent Stock ◽  
Stream Type

Chinook salmon (Oncorhynchus tshawytscha) spawning runs in Glenariffe Stream, New Zealand, exhibited significant changes in life history traits following supplementation releases of hatchery-reared juveniles. Total run strength did not change but the proportion of naturally produced fish declined to 34%. Attempts to separate spawners of natural and hatchery origin were unsuccessful, and 31-48% of natural spawners are now of hatchery origin. Hatchery males were smaller at age 2 and 3 than males of natural origin, and more often matured as jacks, producing an 86-mm decrease in mean fork length over 28 years. There was no change in length at age or age at maturity for female spawners. The proportion of jacks entering Glenariffe Stream each year was positively correlated with the proportion of jacks in the ensuing cohort. Most differences between fish of natural and hatchery origin were related to hatchery rearing practices, but the decline in age at maturity among naturally produced males appears to reflect traits inherited from parent stock of hatchery origin. Hatchery releases may also favour the survival of ocean-type fry over stream-type fry, possibly reversing a tendency for stream-type behaviour to evolve in response to the lack of estuaries on most New Zealand chinook salmon rivers.

Homing and Straying Patterns of Chinook Salmon (Oncorhynchus tshawytscha) from a New Zealand Hatchery: Spatial Distribution of Strays and Effects of Release Date

1993 ◽  
Vol 50 (6) ◽  
pp. 1168-1175 ◽  
Author(s):  
Martin J. Unwin ◽  
Thomas P. Quinn
Keyword(s):  
Spatial Distribution ◽  
New Zealand ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Complex Interaction ◽  
Research Station ◽  
Age At Maturity ◽  
Release Date

Homing and straying patterns of fall chinook salmon (Oncorhynchus tshawytscha) released from the Glenariffe Salmon Research Station on the Rakaia River, New Zealand, are reported, based on coded-wire tag recoveries from the 1978–84 brood years. Of 17 671 tagged adults recovered, 87.9% returned to the Rakaia, and the rest were recovered from 12 other catchments up to 500 km away. The number of strays entering a given river increased with discharge and with proximity to the Rakaia, but most strays were recorded in catchments north of the Rakaia. A higher proportion of salmon released in winter, when the downriver migration of naturally produced chinook is a minimum, strayed to other catchments (14.9–20.6%) than did those released at other times of the year (3.6–7.6%). However, straying within the Rakaia catchment was largely unaffected by release date, suggesting that imprinting by fry to the natal tributary is separate from imprinting by smolts to the mainstem river. There was a complex interaction between age at maturity, release date, and straying rates; straying of 4-yr-old fish was more strongly influenced by release date than straying of younger fish. Notwithstanding this interaction, straying was more prevalent among older fish.

scholarly journals Heritability and Y-chromosome influence in the jack male life history of chinook salmon (Oncorhynchus tshawytscha)

Heredity ◽  
2002 ◽  
Vol 89 (4) ◽  
pp. 311-317 ◽  
Author(s):  
D D Heath ◽  
L Rankin ◽  
C A Bryden ◽  
J W Heath ◽  
J M Shrimpton
Keyword(s):  
Life History ◽  
Y Chromosome ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
History Of ◽  
Male Life History

Isolation of a Y-Chromosomal DNA Probe Capable of Determining Genetic Sex in Chinook Salmon (Oncorhynchus tshawytscha)

1991 ◽  
Vol 48 (9) ◽  
pp. 1606-1612 ◽  
Author(s):  
Robert H. Devlin ◽  
B. Kelly McNeil ◽  
T. David D. Groves ◽  
Edward M. Donaldson
Keyword(s):  
Y Chromosome ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Subtractive Hybridization ◽  
Specific Pattern ◽  
Dna Probe ◽  
Chromosomal Dna ◽  
Males And Females ◽  
Dna Fragment ◽  
Male Specific

We have used subtractive hybridization methodologies to selectively clone a DNA fragment from the Y chromosome of chinook salmon (Oncorhynchus tshawytscha). This clone specifically detects a single 8-kb Bam HI restriction fragment in Southern blots of male genomic DNA that is absent in females. This sex-specific pattern was observed in over 50 individuals from five separate chinook stocks, suggesting that the organization of this sequence is conserved in this species. The strength of the hybridization signal, and the pattern observed in multiple enzyme digests, indicates that this sequence is repeated in the male chinook genome. With long autoradiographic exposures, fainter additional sequences can also be detected both in males and females, suggesting that other similar sequences not organized in a sex-specific fashion are found on the X chromosome and/or autosomes. Examination of the segregation of this DNA sequence in families showed that the male-specific pattern segregates from father to son, providing strong evidence that the DNA probe is from the Y chromosome. The application of Y-chromosomal probes to the commercial culture of this species will simplify the synthesis of new monosex strains and allow verification of existing genotypic female, phenotypic male stocks.

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