Depredación de visón americano sobre desmán ibérico en Galicia

Romero, Rafael

doi:10.7325/galemys.2015.a2

Cited by 6 publications

(7 citation statements)

References 13 publications

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“…According to the IUCN, major threats include water pollution, increased water extraction for irrigation, and habitat fragmentation due to the construction of hydroelectric plants and dams. In addition, predation by American mink ( Neovison vison ) might be affecting populations where this invasive species is abundant (Romero, ). Climate change is also anticipated to be a threat to the desman in the future and, given climate scenarios for the Iberian Peninsula, the distribution of the species and its habitat may experience significant decreases in the most vulnerable areas (Fernandes et al., ; Morueta‐Holme, Fløjgaard, & Svenning, ; Thomas, Griffiths, & Ormerod, ).…”

Section: Introductionmentioning

confidence: 99%

Postglacial dispersal patterns and mitochondrial genetic structure of the Pyrenean desman (Galemys pyrenaicus) in the northwestern region of the Iberian Peninsula

Querejeta

Fernández‐González²,

Romero³

et al. 2017

Ecology and Evolution

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The genetic structure of small semiaquatic animals may be influenced by dispersal across both rivers and land. The relative importance of these two modes of dispersal may vary across different species and with ecological conditions and evolutionary periods. The Pyrenean desman (Galemys pyrenaicus) is an endemic mammal of the Iberian Peninsula with a strong phylogeographic structure and semiaquatic habits, thus making it an ideal model to study the effects of river and overland dispersal on its genetic structure. Thanks to different types of noninvasive samples, we obtained an extensive sampling of the Pyrenean desman from the northwestern region of the Iberian Peninsula and sequenced two mitochondrial DNA fragments. We then analyzed, using an isolation-by-distance approach, the correlation between phylogenetic distances and geographical distances measured along both river networks and land to infer the relative importance of river and overland dispersal. We found that the correlations in the whole area and in a large basin were consistent with an effect of overland dispersal, which may be due to the postglacial colonization of new territories using terrestrial corridors and, possibly, a more extensive fluvial network that may have been present during the Holocene. However, in a small basin, likely to be less influenced by the impact of ancient postglacial dispersal, the correlations suggested significant overall effects of both overland and river dispersal, as expected for a semiaquatic mammal.Therefore, different scales and geographical regions reflect different aspects of the evolutionary history and ecology of this semiaquatic species using this isolation-bydistance method. The results we obtained may have crucial implications for the conservation of the Pyrenean desman because they reinforce the importance of interbasin dispersal for this species in the studied area and the need to protect the whole riverine ecosystem, including rivers, upland streams and terrestrial corridors between basins. K E Y W O R D Sdispersal, Galemys pyrenaicus, genetic diversity, Iberian Peninsula, isolation-by-distance, mitochondrial DNA

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Section: Introductionmentioning

confidence: 99%

Postglacial dispersal patterns and mitochondrial genetic structure of the Pyrenean desman (Galemys pyrenaicus) in the northwestern region of the Iberian Peninsula

Querejeta

Fernández‐González²,

Romero³

et al. 2017

Ecology and Evolution

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“…En cambio, el visón americano (Neovison vison), que también depreda sobre el desmán (Romero 2015) y a menudo se considera un riesgo importante, casi no debe haber incidido en la regresión observada, puesto que sus áreas de distribución no han coincidido hasta muy recientemente (Palazón et al 2016). Sólo en el año 2017 se ha detectado la penetración del visón americano dentro del área ocupada por el desmán en los Pirineos catalanes, concretamente en la cuenca del Ter, donde ahora consituye una amenaza que podría rematar unas poblaciones locales con carácter residual.…”

Section: Discussionunclassified

Regresión reciente y general del desmán ibérico en su límite noreste de distribución

Aymerich¹,

Gosálbez²

2018

Galemys

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La actualización de los datos sobre distribución y frecuencia del desmán (Galemys pyrenaicus) en Cataluña y Andorra muestra una regresión reciente importante en ambos territorios de los Pirineos en los que esta especie tiene su límite nororiental de distribución. Esta información se ha obtenido, tras la prospección repetida de indicios de desmán en 420 tramos fluviales en los periodos 2000-2003 y 2013-2107. La regresión se refleja en la frecuencia relativa de la especie y afecta a todas las cuencas fluviales, con disminuciones de tramos con resultado positivo del 43% en Cataluña y del 70% en Andorra. También se observa una extinción local aparente en varios cursos fluviales, en la mayor parte de los cuales el desmán tenía una presencia importante en 2000-2003. Se desconocen las causas de esta regresión general, aunque se supone que no existe una causa única y que ha sido consecuencia de la suma de varios factores de escala local. Entre los factores que pueden haber incidido se citan la fragmentación del área, los cambios en la gestión de las centrales hidroeléctricas, el incremento de la demanda de agua en los valles pirenaicos, las obras públicas en el entorno fluvial y episodios de crecidas catastróficas. Un factor que quizá también haya infuido en la regresión es la recolonización reciente de la nutria (Lutra lutra) de los ríos con desmán, lo que podría haber generado una depredación poco tolerable sobre poblaciones pequeñas. Por el contrario, no parece que haya influido el cambio climático, ya que el desmán se mantiene bien en ríos del límite meridional con condiciones climáticas potencialmente menos adecuadas. A consecuencia de esta regresión reciente, aplicando los criterios de la IUCN, el desmán se debería de considerar una especie amenazada en la zona de estudio, con las categorías EN (En Peligro) en Cataluña y CR (En Peligro Crítico) en Andorra.

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“…PCR and sequencing designed to amplify all mesocarnivorous from the Iberian Peninsula (Oliveira et al, 2010), proved beyond doubt that the American mink is a real threat to both micromammal species found. On the one hand, Lutra lutra (otter) and Neovison vison (American mink) are the main semi-aquatic carnivores declared to be predators of desman in the Iberian Peninsula (Romero, 2015), as detected by us using sequencing the IRBP gene. However, the American mink is the only one considered invasive of these two carnivorous species, which began to settle in the 1960s but today remains occupying a large part of the Iberian territory (Bravo, 2007), promoting mink eradication plans (RD 630/2013 Spanish Catalogue of Invasive Exotic Species).…”

Section: Highlight the Problem Of Invasive Wildlife And Developed Sol...mentioning

confidence: 98%

“…To further support the last statement, data related to the presence of desman remains do not appear in the description of the usual diet of the American mink in the Central System so far (Bueno 1994(Bueno , 1996Morales et al, 2004Morales et al, , 2010; García-Díaz & Lizana 2013). However, out of Central System it is reported to be a frequent predator in rivers from Galicia (Northwestern Spain) (Romero, 2015). Other reports suggest that at several sites where the desman recently became extinct there, will be no signatures (Gisbert & García-Perea 2010a, 2010b.…”

Section: Highlight the Problem Of Invasive Wildlife And Developed Sol...mentioning

confidence: 99%

“…In the desman from Extremadura, there are reports of significant decrease on individuals and populations in the last decade, which makes it difficult to carry out invasive sampling studies as in other mammals (Fernández-García & Vivas-Cedillo, 2017; Quaglietta, 2018; Baeza et al, 2023). Recent studies have focused on distribution and habitats of desman (Aymerich & Gosálbez, 2004, 2015, Biffi et al, 2020, their socio-spatial and demographic organization (Biffi et al, 2016), and described one of the causes of its possible population decrease due to the predation of mesocarnivorous such as the American mink Neovison vison (Schreber, 1777) (Nores et al 2012, Gisbert & García-Perea 2010a, 2010b and the Palearctic otter Lutra lutra (Linnaeus, 1758), (Callejo et al,1985).…”

Section: Introductionmentioning

confidence: 99%

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First evidence of predation on the native endangered Galemys pyrenaicus by the invader specie American mink using eDNA tools in Extremadura (Spain).

Fernandez-Garcia

2024

Preprint

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In recent years it has been claimed that the introduction of invasive species significantly damages ecosystems. Their ability to adapt has been overestimated, without considering the consequences they could have on the native fauna. One of the clearest examples is the American mink (Neovison vision), which has also been postulated as a large predator. Its diet includes small native mammals such Mediterranean water shrew (Neomys anomalus), also one of great importance, Iberian desman (Galemys pyrenaicus), which today is seriously endangered due to the population decline it has suffered in recent years. There are very few studies that have been carried out in the Central System Mountains of the region of Extremadura that help to understand the impact of the diet of these invasive species. Thanks to non-invasive sampling through faecal collection and non-invasive genetic techniques, we can track the impact of predators such as mink and. The assay was developed using the TaqMan probe design for duplex RT-PCR simultaneously targeting the CYB genes of the native species G. pyrenaicus and Neomys anomalus, demonstrating the evidence of the presence of micromammals. Therefore, the assay has high analytical sensitivity for both target species, and is a tool that will helps to monitor the damage of invasive species.

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Depredación de visón americano sobre desmán ibérico en Galicia

Cited by 6 publications

References 13 publications

Postglacial dispersal patterns and mitochondrial genetic structure of the Pyrenean desman (Galemys pyrenaicus) in the northwestern region of the Iberian Peninsula

Postglacial dispersal patterns and mitochondrial genetic structure of the Pyrenean desman (Galemys pyrenaicus) in the northwestern region of the Iberian Peninsula

Regresión reciente y general del desmán ibérico en su límite noreste de distribución

First evidence of predation on the native endangered Galemys pyrenaicus by the invader specie American mink using eDNA tools in Extremadura (Spain).

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