Molecular Evidence for Introgression and Loss of Genetic Variability in Salmo (trutta) macrostigma as a Result of Massive Restocking of Apennine Populations (Northern and Central Italy)

Marzano, F.; Corradi, Nicolas; Papa, Riccardo; Tagliavini, James; Gandolfi, G.

doi:10.1023/b:ebfi.0000005762.81631.fa

Cited by 41 publications

(34 citation statements)

References 17 publications

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“…The rivers analysed, which were chosen based on reports of recent sightings of the species, showed a high level of genetic introgression; four of the seven rivers (Rio Ermolinus, Rio Su Fruscu, Rio Altana and Rio Mannu) were compromised, which reflects a real reduction in the genetic integrity of the endemic trout in the basins of the Mediterranean area; this fact has been reported previously by several authors (Gandolfi et al 1991;Poteaux & Berrebi 1997;Nonnis Marzano et al 2003;Caputo et al 2004;Aparicio et al 2005;Sabatini et al 2006;Schöffman & Sušnik 2007;Splendiani et al 2007). The data presented in this paper confirmed the presence of two evolutionary lineages in Sardinia: the endemic haplotype (Ad) and the non-endemic haplotype (At, originated from hatchery brown trout of Atlantic origin).…”

Section: Discussionmentioning

confidence: 62%

Genetic characterization and artificial reproduction attempt of endemic Sardinian troutSalmo truttaL., 1758 (Osteichthyes, Salmonidae): Experiences in captivity

Sabatini

Cannas

Follesa

et al. 2011

Italian Journal of Zoology

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Native species of Sardinian brown trout (Salmo trutta) have declined drastically because of the introduction of non-native salmonids, overharvesting, and habitat degradation. One approach to conservation of declining species is to establish new populations through repopulation with genetically certified fish. In this study, samples of brown trout from seven rivers in Sardinia were analysed to look for the presence of pure individuals of the endemic Sardinian trout. Analyses of the mitochondrial DNA control region and the LDH-C1* gene revealed the presence of non-endemic and hybrid individuals in four of the seven rivers analysed. In addition, we reared a stock of native Sardinian trout at the experimental fish farm of Sadali and had them reproduce artificially. This experiment provided more knowledge about the incubation phase, hatching, reabsorption of the vitelline sac and the initial phases of growth, which can be used to develop more optimal management of this resource.

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Section: Discussionmentioning

confidence: 62%

Genetic characterization and artificial reproduction attempt of endemic Sardinian troutSalmo truttaL., 1758 (Osteichthyes, Salmonidae): Experiences in captivity

Sabatini

Cannas

Follesa

et al. 2011

Italian Journal of Zoology

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“…For example, local stock heterogeneity of brown trout is being eroded by introductions of hatchery-reared fish (Machordom et al, 1999) and native strains are being replaced by introductions of a different strain (Largiader and Scholl, 1995;Marzano et al, 2003). Pearl oyster stocks that were previously genetically distinct have been homogenised by the impacts of transplants (Arnaud-Haond et al, 2004).…”

Section: Effects Of Released Stock On Genetic Make-up Of Natural Popumentioning

confidence: 99%

The importance of identifying spatial population structure in restocking and stock enhancement programmes

2006

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“…(92/43/EEC). Gratton et al, 2013;Nonnis Marzano et al, 2003;Querci et al, 2013;Sabatini et al, 2011). Indeed, several studies employing genetic markers confirmed that only a few locations might be considered to host "pure" populations of S. cettii (e.g.…”

Section: Introductionmentioning

confidence: 99%

Investigating the genetic structure of trout from the Garden of Ninfa (central Italy): Suggestions for conservation and management

Fabiani

Gratton

Zappes

et al. 2017

Fisheries Management Eco

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Mediterranean populations of brown trout (Salmo trutta L. complex) have lost a large part of their genetic distinctiveness, mostly due to massive restocking, and the waters of the Gardens of Ninfa (province of Latina, central Italy, Site of Community Importance since 2013) are regarded as one of a few potential reservoirs of autochthonous trout lineages in the Tyrrhenian drainage of the Italian peninsula. In this study, nuclear and mitochondrial markers were used on brown trout samples from Ninfa to estimate non-Mediterranean influence in the population gene pool, potential changes of genetic structure over time and genetic relationships with other sites known (or suspected) to host native trout gene pools. Striking changes in both microsatellite and mtDNA allele frequencies over a 9-year time span were found and provided evidence of unrecorded stocking from the nearby Lake Fibreno. Results are analysed in the light of potential ecological consequences of such events on a longer time scale and provide a scientific background for fisheries management and conservation programmes in the area

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Molecular Evidence for Introgression and Loss of Genetic Variability in Salmo (trutta) macrostigma as a Result of Massive Restocking of Apennine Populations (Northern and Central Italy)

Cited by 41 publications

References 17 publications

Genetic characterization and artificial reproduction attempt of endemic Sardinian troutSalmo truttaL., 1758 (Osteichthyes, Salmonidae): Experiences in captivity

Genetic characterization and artificial reproduction attempt of endemic Sardinian troutSalmo truttaL., 1758 (Osteichthyes, Salmonidae): Experiences in captivity

The importance of identifying spatial population structure in restocking and stock enhancement programmes

Investigating the genetic structure of trout from the Garden of Ninfa (central Italy): Suggestions for conservation and management

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