One-generation effects of farmed fish immigration on the genetic differentiation of wild Atlantic salmon in Norway

Mork, J.

doi:10.1016/0044-8486(91)90391-j

Cited by 31 publications

(11 citation statements)

References 5 publications

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“…Notably, all the temporally unstable populations gained new alleles with time. The potential loss of genetic diversity among wild populations following introgression of farmed salmon escapees had been earlier hypothesized (Mork, ) as farmed salmon have a limited genetic background (Gjedrem, ; Gjedrem, Gjoen et al., ). Finally, through simulations using the observed effective population sizes, the authors excluded genetic drift as a major contributory factor of the observed temporal genetic changes in those populations and, thus, concluded that introgression of farmed escapees was the primary driver of the observed temporal genetic changes.…”

Section: Geneticsmentioning

confidence: 98%

Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions

et al. 2017

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Atlantic salmon (Salmo salar) is one of the best researched fishes, and its aquaculture plays a global role in the blue revolution. However, since the 1970s, tens of millions of farmed salmon have escaped into the wild. We review current knowledge of genetic interactions and identify the unanswered questions. Native salmon populations are typically genetically distinct from each other and potentially locally adapted. Outside Norway, introgression remains unquantified, and in all regions, biological changes and the mechanisms driving population-specific impacts remain poorly documented. Nevertheless, existing knowledge shows that the long-term consequences of introgression is expected to lead to changes in life-history traits, reduced population productivity and decreased resilience to future challenges. Only a major reduction in the number of escapees and/or sterility of farmed salmon can eliminate further impacts. K E Y W O R D Saquaculture, evolution, fish farming, fitness, genetic, hybrid

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Section: Geneticsmentioning

confidence: 98%

Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions

et al. 2017

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“…founding populations (Allendorf and Phelps 1980;Ferguson et al 1991), (2) some hatchery practices induce straying (Lasson 1984;Eriksson and Eriksson 1991;Hindar et al 1991;Kindar 1991), and (3) escaped net-pen fish have negatively impacted wild stocks (Gausen and Moen 1991;Mork 1991) and do not necessarily heed international borders (Wing et al 1992). Additionally, management agencies still conduct extensive planting of fish for sport angling, often using a single stock of fish for stocking over a broad geographical area.…”

Section: Conspecificsmentioning

confidence: 98%

Triploid Coho Salmon Outperform Diploid and Triploid Hybrids Between Coho Salmon and Chinook Salmon During Their First Year

Habicht¹,

Seeb²,

Gates³

et al. 1994

Can. J. Fish. Aquat. Sci.

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Habicht, C., j.E. Seeb, R.B. Gates, I.R. Brock, and C.A. Olito. 1994. Triploid coho salmon outperform diploid and triploid hybrids between coho salmon and chinook salmon during their first year. Can. 1. Fish. Aquat. Sci. 57 (Suppl. 1): 31-37.Sterile hybrid and triploid fish may provide hatchery programs with a tool to reduce the risk of genetic contamination of wild stocks, provided these fish have acceptable performance characteristics. We examined growth, survival, and deformities in diploid and triploid families of coho salmon (Oncorhynchus kisutch) and hybrids between coho salmon females X. chinook salmon ( 0 . tshawytscha) males. Data were collected from the half-sibling families through day 387. A reparameterined Gompertm growth model showed that conspecific coho salmon grew faster than hybrids, regardless of ploidy. No difference in growth rates was found between diploids and triploids. Abnormalities were significantly associated with the male parent but not with ploidy component, in contrast to previous observations of reduced deformity occurrence in triploid hybrids. Food conversion was better for conspecifics than hybrids during initial feeding, but not different during the second half of the experiment. No ploidy or cross x ploidy interaction effects on food conversion efficiency were observed. Finally, conspecifics had better posthatching survival than hybrids, regardless of ploidy. Of the treatments studied, conspecific triploid coho salmon may be the most viable alternative for sterile fish production: they performed as well as the conspecific diploids and better than either diploid or triploid hybrids.Des poissons hybrides et des poissons triploi'des steriles pourraient &re utilises dans Bes programmes df41evage pour reduire le risque de contamination gknktique des stocks sauvages s'ils presentaient des caracteristiques de rendement acceptables. Les auteurs ont examine les taux de croissance, de survie et de difformite chez des farnilles de saumons cohos (Oncorhynchus kisutch) diploaides et triploi'des et des hybrides obtenus de croisements de saumons cohos femelles et de saumons quinnats (0. tshawytscha) males. Ils ont recueilli des donnees sur les familles 3 demi-apparentees pendant 387 jours. Une courbe de croissance reparametree de Gompertn a r6vbl6 que le taux de croissance des cohos congeneres etait plus eleve que chen les hybrides, independamment du degre de pbidie; par contre, C i nfy avait pas de diffkreaace de ce taux entre Bes saumons diploi'des et triploi'des. Les anomalies btaient liees de facon significative au parent male, mais non 3 la ploi'die; ceci va l'encontre d'observations antkrieures selon lesquelles les hybrides triploi'des montrent Len taux moindre de difformite. Le taux de conversion des aliments 4tait plus $lev6 chez les congeneres que chen les hybrides la premiere prise d'aliments, mais nf6tait pas different pendant la deuxierne moiti6 de I'experience. Les auteurs n'ont pas observ6 d'incidence du degre de plo'idie ou de ifinteraction croisement et plo'idie sur Ifefficaci...

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“…The rapid expansion of commercial aquaculture has raised many concerns such as disease problems, 'genetic pollution' through the release of genetically engineered fish, and escape of exotic and introduced species (Hindar et at, 1991;Mork, 1991;Robinette et at, 1991;Saunters, 1991;Taylor, 1991). Escaped farmed salmon constitute a substantial proportion of the mature fish present on the spawning grounds and in commercial catches in Europe (Gausen and Moen, 1991;Gudjonsson, 1991;Lund etat, 1991;Lura and Saegrov, 1991;Webb and Youngson, 1992;Webb et at, 1993a,b).…”

Section: Introductionmentioning

confidence: 99%

The role of molecular genetic markers in the management of cultured fishes

Ferguson¹

1994

Rev Fish Biol Fisheries

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One-generation effects of farmed fish immigration on the genetic differentiation of wild Atlantic salmon in Norway

Cited by 31 publications

References 5 publications

Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions

Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions

Triploid Coho Salmon Outperform Diploid and Triploid Hybrids Between Coho Salmon and Chinook Salmon During Their First Year

The role of molecular genetic markers in the management of cultured fishes

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