The effect of domestication on a brown trout (Salmo trutta m fario) broodstock in Hungary

Horváth, Ákos; Hoitsy, György; Kovács, Balázs; Sipos, Dóra; Ősz, Ágnes; Bogataj, Klavdija; Urbányi, Béla

doi:10.1007/s10499-013-9665-2

Cited by 5 publications

(6 citation statements)

References 17 publications

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“…, , ), which caused the loss of intraspecific variability after the introduction of non‐native strains and a change in genetic composition of native brown trout stock of Danube lineage (Horváth et al . ; Simonović et al . ).…”

Section: Discussionmentioning

confidence: 99%

Risk screening of non‐native freshwater fishes in Croatia and Slovenia using the Fish Invasiveness Screening Kit

Piria

Povž

Vilizzi

et al. 2016

Fisheries Management Eco

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The Fish Invasiveness Screening Kit (FISK) version 2 was used to assess the invasiveness potential of 40 introduced and translocated freshwater fish species to Croatia and Slovenia. Based on a priori classification of invasiveness, receiver operating characteristic analysis of FISK scores from two independent assessors resulted in a statistically significant calibration threshold of 11.75. This indicated that FISK was able to discriminate reliably between non‐native species likely to pose a high risk of being invasive and those likely to pose a medium or low risk of invasiveness. Seven species were categorised as ‘medium risk’ and the other 33 as ‘high risk’, whereas no species was categorised as ‘low risk’. The two highest scoring species were European catfish Silurus glanis and North African catfish Clarias gariepinus. Mean scores for all species classified a priori as invasive were ranked as ‘high risk’ sensu lato and fell into the ‘moderately high risk’ subcategory. FISK proved to be a valid tool for assessing the risks posed by non‐native fishes in Croatia and Slovenia. For this reason, it can be adopted as a reliable tool for the prevention of new translocations or introductions of potentially invasive species in the risk assessment area, as well as to assist in decisions regarding future management (i.e. monitoring, control and eradication) and conservation strategies.

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Section: Discussionmentioning

confidence: 99%

Risk screening of non‐native freshwater fishes in Croatia and Slovenia using the Fish Invasiveness Screening Kit

Piria

Povž

Vilizzi

et al. 2016

Fisheries Management Eco

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“…These enhancements have included releases of artificially reared stocks or escapes of large numbers of individuals characterized by lower fitness (Satake and Araki 2011;Baskett et al 2013;Milot et al 2013;Naish et al 2013) and lower genetic diversity have been reported for some species, including Adriatic sturgeon (Boscari and Congiu 2014), Korean starry flounder ) and black sea bream in Japan (Blanco Gonzalez and Umino 2009). Other effects have been introductions of nonindigenous populations, such as salmon in Poland (Poćwierz-Kotus et al 2015a;Bernaś et al 2016); or alien populations of the same species and their subsequent hybridization a Corresponding author: rwenne@iopan.gda.pl with local native populations, as with salmon and brown trout in Bulgaria (Chelenkova et al 2012), Norway (Thaulow et al 2012), Hungary (Horváth et al 2013) and in Spain (Madeira et al 2005), pikeperch in Finland (Salminen et al 2012); unintentional escapes from hatcheries as red sea bream in Japan (Blanco Gonzalez et al 2015), salmon in Norway (Liu et al 2013) and Canada (Fraser et al 2008). Accidental or deliberate introductions of exotic and invasive species to new environments, often beneficial economically, causes distortions in the functioning of local ecosystems and can threaten native populations of fish and shellfish, as in the case of brown trout in Japan (Hasegawa and Maekawa 2008), Patagonia (Vigilano et al 2007;Young et al 2010) and in North America (Turek et al 2016), mussel Mytilus in Europe and South Africa (Kijewski et al 2009;McQuaid et al 2015 and oyster Crassostrea gigas (Carlton 1979;Meehan et al 1989;Miller et al 2012;Lallias et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Recent genetic changes in enhanced populations of sea trout (Salmo truttam.trutta) in the southern Baltic rivers revealed with SNP analysis

Wenne

Bernaś

Poćwierz-Kotus

et al. 2016

Aquat. Living Resour.

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-The genetic structure of a fish population is usually thought to be stable over time. In the southern Baltic, Salmo trutta m. trutta (sea trout) populations have been characterized by low degree of genetic differentiation. All studied populations had been heavily stocked with mixed material for many years prior to the sampling period, including releases of Pomeranian sea trout to the Vistula River in Poland, Southern Baltic. However, the strategy of stocking became river based a few years before the sampling began. Juveniles from artificial reproduction are released only to their parental river, which reduces the mixing of the gene pool of fish from different populations. Changes in sea trout populations in the southern Baltic over time were studied using single nucleotide polymorphisms (SNPs). Genetic composition of populations of sea trout in the Vistula and Drwȩca river system were found to increasingly resemble the non-admixed hatchery population from Aquamar (Miastko, Poland), whereas the Pomeranian populations were stable. The implementation of a new stocking strategy for the restoration and protection of Vistula sea trout was noted as possible explanation. With the increase of natural breeding, artificial enhancement of sea trout populations should be reduced.

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“…1 , Table 1 ). Earlier all breerders (401 fishes) were sampled at the Lillafüred tout farm in order to create a marker-assisted breeding system in this broodstock ( Horváth et al., 2014 ). Additional 243 breeder candidates were also sampled in the Lillafüred broodstock for this study; these fish originated from outside of the hatchery for refreshing the stock and were kept separately from the older breeders mentioned above.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, five microsatellite loci were used to analyse the genetic composition of the populations. Amplification and digestion methods were used according to Horváth et al. (2014) .…”

Section: Methodsmentioning

confidence: 99%

“…Although the origin and phylogeny of this species has been studied intensively in the countries around Hungary, the information available on Hungarian populations is sparse. The genetic background of farmed broodstocks are partly known and the results revealed that they are of mixed Atlantic and Danubian origin ( Horváth et al., 2014 ). The history and formation of wild populations are also only partly known.…”

Section: Introductionmentioning

confidence: 99%

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The genetic status of the Hungarian brown trout populations: exploration of a blind spot on the European map ofSalmo truttastudies

Ősz

Horváth

Hoitsy³

et al. 2018

PeerJ

Self Cite

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BackgroundAnalyses of the control region sequences of European brown trout populations’ mitrochondrial DNA have revealed five main evolutionary lineages (Atlantic, Danubian, Mediterranean, Adriatic, Marble) mostly relating to the main water basins; however, the hybridization between lineages were increasingly reported. Due to the hydrogeography of Hungary, wild populations should theoretically belong to the Danubian lineage, however, this has not been verified by genetic studies.MethodsIn our study multiple molecular marker sets (mitochondrial sequence, microsatellites, PCR-RFLP of nuclear markers and sex marker) were used to investigate the genetic composition and population genetics of the brown trout populations in two broodstocks, six wild streams in Hungary and one Serbian population.ResultsThe admixture of Atlantic and Danubian lineages in these populations, except the Serbian population with pure Danubian origin, was observed by control region sequences of mitochondrial DNA and PCR-RFLP markers in the nuclear genome, and one unpublished Danubian haplotype was found in Hungarian populations. A sex-specific marker revealed equal gender ratio in broodstocks and Kemence stream, whereas in other wild streams the proportion of female individuals were less than 50%. Structure and principal component analyses based on the alleles of microsatellite loci also revealed overlapping populations, however the populations were still significantly different from each other and were mostly in Hardy-Weinberg equilibrium.DiscussionStocking and migration can have a significant genetic impact on trout populations of wild streams, however there are no guidelines or common practices for stocking of small streams in Hungary, thus the genetic background of these populations should be considered when developing conservation actions.

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The effect of domestication on a brown trout (Salmo trutta m fario) broodstock in Hungary

Cited by 5 publications

References 17 publications

Risk screening of non‐native freshwater fishes in Croatia and Slovenia using the Fish Invasiveness Screening Kit

Risk screening of non‐native freshwater fishes in Croatia and Slovenia using the Fish Invasiveness Screening Kit

Recent genetic changes in enhanced populations of sea trout (Salmo truttam.trutta) in the southern Baltic rivers revealed with SNP analysis

The genetic status of the Hungarian brown trout populations: exploration of a blind spot on the European map ofSalmo truttastudies

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