Not all lineages are equally invasive: genetic origin and life-history in Atlantic salmon and brown trout acclimated to the Southern Hemisphere

Valiente, America G.; Ayllón, Fernando; Núñez, Pablo; Juanes, Francis; García‐Vázquez, Eva

doi:10.1007/s10530-010-9746-3

Cited by 15 publications

(14 citation statements)

References 64 publications

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“…Salmonid populations of farm origin appear to be less successful invaders than populations of wild origin (Soto et al. 2001; Valiente et al. 2010), although as our study indicates, invasion success of non‐native salmonids will also depend strongly on propagule pressure.…”

Section: Discussionmentioning

confidence: 67%

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Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non‐native rainbow trout

Consuegra¹,

Phillips²,

Gajardo³

et al. 2011

Evolutionary Applications

139

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Aquaculture is a major source of invasive aquatic species, despite the fact that cultured organisms often have low genetic diversity and tend to be maladapted to survive in the wild. Yet, to what extent aquaculture escapees become established by means of high propagule pressure and multiple origins is not clear. We analysed the genetic diversity of 15 established populations and four farmed stocks of non-native rainbow trout in Chile, a species first introduced for recreational fishing around 1900, but which has in recent decades escaped in large numbers from fish farms and become widespread. Aquaculture propagule pressure was a good predictor of the incidence of farm escapees, which represented 16% of all free-ranging rainbow trout and were present in 80% of the study rivers. Hybrids between farm escapes and established trout were present in all rivers at frequencies ranging between 7 and 69%, and population admixture was positively correlated with genetic diversity. We suggest that non-native salmonids introduced into the Southern Hemisphere could benefit from admixture because local adaptations may not have yet developed, and there may be initially little fitness loss resulting from outbreeding depression.

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Section: Discussionmentioning

confidence: 67%

“…2009), despite the farm origin of many of the initial founder stocks (Riva Rossi et al. 2004; Valiente et al. 2010).…”

Section: Discussionmentioning

confidence: 99%

Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non‐native rainbow trout

Consuegra¹,

Phillips²,

Gajardo³

et al. 2011

Evolutionary Applications

139

View full text Add to dashboard Cite

show abstract

“…Both habitat conditions and biological properties of the recipient ecosystem determine the success of aquatic invasions (e.g. Zaiko et al, 2007Zaiko et al, , 2011Valiente et al, 2010aValiente et al, , 2010b, being generally facilitated in degraded environments (e.g. MacDougall and Turkington, 2005;Linde et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Barcodes of marine invertebrates from north Iberian ports: Native diversity and resistance to biological invasions

Miralles

Ardura

Arias

et al. 2016

Marine Pollution Bulletin

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Ports are gateways for many marine organisms transported by ships worldwide, especially non-indigenous species (NIS). In this study carried out in North Iberian ports (Cantabrian Sea, Bay of Biscay) we have observed 38% of exotic macroinvertebrates. Four species, namely the barnacle Austrominius modestus, the tubeworm Ficopomatus enigmaticus, the Pacific oyster Crassostrea gigas and the pygmy mussel Xenostrobus securis, exhibited clear signs of invasiveness. A total of 671 barcode (cytochrome oxidase subunit I or 18S rRNA) genes were obtained and confirmed the species status of some cryptic NIS. Negative and significant correlation between diversity estimators of native biota and proportion of NIS suggests biotic resistance in ports. This could be applied to management of port biota for contributing to prevent the settlement of biopollutants in these areas which are very sensitive to biological invasions.

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“…In such cases, the selection of long‐term domesticated individuals has been proposed as a conservation strategy, as their capacity for naturalization, and therefore invasiveness, is likely lower than that for recently domesticated farm stocks (Valiente et al . ). Although released or escaped hatchery‐selected fish may be more susceptible to predation than wild fish (Jonsson ; Einum & Fleming ), farmed fish escapees are commonly observed entering rivers and breeding with their wild conspecifics (e.g.…”

Section: Introductionmentioning

confidence: 97%

Abundance of native fishes, wild‐introduced salmonids and escaped farmed rainbow trout in a Patagonian reservoir

et al. 2014

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The introduction of salmonids in Patagonia has resulted in significant impacts on its lakes, as well as a major impact on streams, in which native fishes seem to have been displaced almost completely by rainbow trout (Oncorhynchus mykiss). Another perspective is that the introduced salmonid species have resulted in wild fish populations that sustain an economically important sport fishery. The wide distribution and high abundance of escaped farmed rainbow trout, and a clear decrease in the abundance of native and successfully introduced salmonid species in Alicura Reservoir were all observed, based on comparison of recent data and data from 1993 to 1995 corresponding to littoral gillnet captures. Thus, both native fish and introduced salmonid populations seem to have been drastically reduced in the presence of farmed fish escapees. The results of the present study regarding fish escapes deserve major consideration when making decisions about fish cage culture activities for other Patagonian reservoirs.

show abstract

Not all lineages are equally invasive: genetic origin and life-history in Atlantic salmon and brown trout acclimated to the Southern Hemisphere

Cited by 15 publications

References 64 publications

Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non‐native rainbow trout

Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non‐native rainbow trout

Barcodes of marine invertebrates from north Iberian ports: Native diversity and resistance to biological invasions

Abundance of native fishes, wild‐introduced salmonids and escaped farmed rainbow trout in a Patagonian reservoir

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