A short hatchery history: does it make a difference to aggressiveness in European grayling?

Salonen, Annamari; Peuhkuri, Nina

doi:10.1111/j.0022-1112.2004.00549.x

Cited by 13 publications

(13 citation statements)

References 52 publications

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“…In contrast, lower levels of aggression in domesticated fish have sometimes been found in brown trout (Petersson & Järvi 2003), especially at high densities (Hedenskog et al 2002), Arctic charr during feeding periods only (Brännäs et al 2005) and European grayling, Thymallus thymallus (Salonen & Peuhkuri 2004). Variable effects of domestication on aggression may be the result of the species concerned or of differences in the conditions in which domestication takes place.…”

Section: Effects Of Domestication On Aggressionmentioning

confidence: 97%

Fighting and Aggression

Damsgård¹,

Huntingford²

2012

Aquaculture and Behavior

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Aggression (behaviour that actually or potentially causes harm to another animal) is widespread among fishes, often taking the form of territoriality or dominance. The mechanisms that control aggression in fish are described, including the effects of stimuli from opponents, the importance of the context in which an aggressive encounter occurs and the effects of nutritional condition, endocrine status and brain biochemistry. The way aggression changes during development is then considered, evidence given for inherited differences in aggressiveness and an account presented of the environmental factors that influence the way aggression develops. The benefits that fish gain from winning fights, the costs that they incur from fighting and how they balance costs against benefits to promote their individual fitness are described. Data are then given on the incidence of aggression among cultured fish, on some resulting problems for production, welfare and environmental protection and on the effects of domestication and captive rearing of aggressiveness. Possible solutions to such problems are discussed, based on selecting appropriate fish for culture and the design of husbandry systems that minimise aggression. Finally, some systems for mitigating the effects of domestication and captive rearing on the aggressive behaviour of cultured fish are described.

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Section: Effects Of Domestication On Aggressionmentioning

confidence: 97%

Fighting and Aggression

Damsgård¹,

Huntingford²

2012

Aquaculture and Behavior

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“…Domesticated fish, compared with their wild counterparts, are subjected to the selective conditions of fish hatcheries, often resulting in poor survival rates and lower fitness levels in the wild (e.g. Metcalfe, Valdimarsson & Morgan 2003; Salonen & Peuhkuri 2004). Furthermore, stocked fish had practically no hiding response, while wild fish would immediately seek concealment.…”

Section: Implications For Conservation and Managementmentioning

confidence: 99%

Conservation genetics and management implications for European grayling, Thymallus thymallus: synthesis of phylogeography and population genetics

Gum¹,

Gross²,

Geist³

2009

Fisheries Management Eco

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European grayling, Thymallus thymallus (L.), populations have steadily declined since the mid-1980s, mostly because of habitat degradation and increased predation pressure. To provide guidelines for conservation strategies and future management programmes, delineation of conservation and management units is warranted. Over the last decade, several studies have investigated the phylogeography and population genetic structure of T. thymallus using mitochondrial and nuclear microsatellite DNA markers. However, no study has covered the distribution range of T. thymallus across Europe; thus, a comprehensive survey of the evolutionary history of the species is lacking. This paper synthesises the major findings of the molecular studies and provides guidelines for the conservation and management of genetic resources of T. thymallus. At least five major mtDNA lineages have evolved in geographical isolation during the Pleistocene and these lineages should be recognised as the basic evolutionary significant units for T. thymallus in northern, central and southern Europe. There is also evidence for a high level of admixture among major lineages and sublineages, especially in the contact zones of drainages (e.g. in mainland Sweden and Norway and in central Germany), most probably resulting from a complex process of post-glacial and inter-glacial colonisation and re-colonisation events from different refugia during the Pleistocene ice ages. Based on the microsatellite data, T. thymallus shows a substantial level of inter-population genetic differentiation and, compared with other freshwater fish species, a relatively low level of within-population genetic diversity. The species develops discrete population structure, both within hydrologically connected rivers or lakes on comparatively small scales as well as in large river systems. K E Y W O R D S : evolutionary significant units, genetic diversity, microsatellites, mtDNA, salmonids.

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“…Exposure to a captive environment under such a programme did not drive single-generation divergence of captive from wild-origin counterparts in dominance behaviour, but did in growth rate. The divergence in growth rate was unlikely a result of inbreeding or genetic drift because crosses within the conservation programme were carefully planned to avoid crossing close relatives and to retain genetic diversity (Salonen & Peuhkuri 2004;O'Reilly & Harvie 2009). Moreover, any family effects are likely to have been negligible as 24 or more founders were used to establish the original domestication lines (De Mestral et al 2013) and 11-22 crosses were created from each line for the present experiments.…”

Section: Discussionmentioning

confidence: 99%

Can conservation‐oriented, captive breeding limit behavioural and growth divergence between offspring of wild and captive origin Atlantic salmon (Salmo salar)?

Wilke

O’Reilly

Macdonald

et al. 2014

Ecology of Freshwater Fish

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Captive rearing is being used increasingly to maintain demographics and genetic diversity of threatened fish populations and species, but its effectiveness can be hindered by domestication, that is, inadvertent selection for performance in captivity at the cost of that in the wild. Some captive rearing programmes have begun to take steps to limit such domestication, but the results are ambiguous, as the degree of generational exposure to captivity is often difficult to control. Using an endangered population of Atlantic salmon (Salmo salar) currently undergoing conservation‐oriented captive rearing, we tested for domestication effects on dominance (dyadic trials) and growth (seminatural stream channels with differing densities and group proportions) of juvenile offspring of wild and captive origin parents. Pedigree data afforded the ability to compare these effects among three specific study groups: wild, single‐generation captives and two to three generation captives. Our results indicate that, despite conservation breeding practices, a divergence in growth can occur in as little as one generation without divergence in dominance behaviour. Further, evidence suggests that trait divergence did not increase with generations in captivity. Given the experimental design, results and supporting literature, we conclude that this contemporary divergence is likely genetic and driven by a combination of factors, including variation in selective histories influencing behaviour.

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A short hatchery history: does it make a difference to aggressiveness in European grayling?

Cited by 13 publications

References 52 publications

Fighting and Aggression

Fighting and Aggression

Conservation genetics and management implications for European grayling, Thymallus thymallus: synthesis of phylogeography and population genetics

Can conservation‐oriented, captive breeding limit behavioural and growth divergence between offspring of wild and captive origin Atlantic salmon (Salmo salar)?

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