10,279 research outputs found

    Dolphin Morbillivirus in Eurasian Otters, Italy

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    We report biomolecular evidence of dolphin morbillivirus in 4 wild Eurasian otters (Lutra lutra) from southern Italy; 2 animals showed simultaneous immunohistochemical reactivity against morbilliviral antigen. These cases add further concern and support to the progressively expanding host range of dolphin morbillivirus in the western Mediterranean Sea

    Deteção molecular de Mycobacterium avium subsp. paratuberculosis em duas lontras (Lutra lutra, Linnaeus, 1758)

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    Deteção molecular de Mycobacterium avium subsp. paratuberculosis em duas lontras (Lutra lutra, Linnaeus, 1758)

    Rediscovering Lutra lutra from Grotta Romanelli (southern Italy) in the framework of the puzzling evolutionary history of Eurasian otter

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    A river otter hemimandible has been rediscovered during the revision of the historical collections of G.A. Blanc from Grotta Romanelli, complementing the ongoing multidisciplinary research fieldwork on the site. The specimen, recovered from the level G (“terre rosse”; early Late Pleistocene or late Middle Pleistocene), is here assigned to Lutra lutra. Indeed, morphological and morphometric comparisons with other Quaternary Lutrinae fossils from Europe allow to exclude an attribution to the relatively widespread and older Lutra simplicidens, characterized by distinctive carnassial proportions. Differences with Cyrnaonyx antiqua, which possessed a more robust, shellfish-feeding dentition, support the view of a successful niche repartition between the two species during the late Middle to Late Pleistocene of Europe. The occurrence of Lutra lutra from the “terre rosse” of Grotta Romanelli suggests deep modifications of the landscapes due to the ecological adaptation of the taxon, and indicates that the Eurasian otter spread into Europe at the Middle–Late Pleistocene transition

    Dieta otoño-invernal de tres carnívoros, visón europeo (Mustela lutreola), nutria euroasiática (Lutra lutra)

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    This study describes the autumn-winter diet of three carnivores (Mustela lutreola, Lutra lutra and Genetta genetta) in northern Spain. Diet composition was analysed from 85 European mink, 156 otter and 564 spotted genet fecal samples The European mink diet was based on small mammals (relative frequency of occurrences 38.1%), fish (30.9%) and birds (16.7%). Spotted genet consumed mainly small mammals, birds and fruits, whilst otter predated practically only fish (95%). Using Levins’ index, trophic-niche widths in European mink, small–spotted genet and Eurasian otter were 3.76, 3.77 and 1.10, respectively. The trophic niche overlap by Pianka index for autumn-winter was 0.77 for European mink vs. Small-spotted genet, and 0.60 for European mink vs. otter. The average size of brown trout taken by otter was larger than those consumed by European mink. Key words: European mink (Mustela lutreola), Eurasian otter (Lutra lutra), Small–spotted genet (Genetta genetta), Diet, Spain.This study describes the autumn-winter diet of three carnivores (Mustela lutreola, Lutra lutra and Genetta genetta) in northern Spain. Diet composition was analysed from 85 European mink, 156 otter and 564 spotted genet fecal samples The European mink diet was based on small mammals (relative frequency of occurrences 38.1%), fish (30.9%) and birds (16.7%). Spotted genet consumed mainly small mammals, birds and fruits, whilst otter predated practically only fish (95%). Using Levins’ index, trophic-niche widths in European mink, small–spotted genet and Eurasian otter were 3.76, 3.77 and 1.10, respectively. The trophic niche overlap by Pianka index for autumn-winter was 0.77 for European mink vs. Small-spotted genet, and 0.60 for European mink vs. otter. The average size of brown trout taken by otter was larger than those consumed by European mink. Key words: European mink (Mustela lutreola), Eurasian otter (Lutra lutra), Small–spotted genet (Genetta genetta), Diet, Spain.Se describe la dieta otoño-invernal de tres carnívoros (Mustela lutreola, Lutra lutra y Genetta genetta) en el norte de España. La dieta fue analizada a partir de 85 muestras de visón europeo, 156 de nutria euroasiática y 564 de gineta común. El visón europeo basó su dieta en micromamíferos (38,1% de frecuencia relativa), peces (30,9%) y aves (16,7%). La gineta común consumió principalmente micromamíferos, aves y frutos, mientras la nutria predó casi exclusivamente peces (95%). Los índices de Levins de la anchura del nicho trófico del visón europeo, la gineta común y la nutria fueron 3,76, 3,77 y 1,10 respectivamente. Los solapamientos del nicho trófico durante otoño-invierno del visón europeo (índice de Pianka) respecto a la gineta común y la nutria euroasiática fueron 0,77 y 0,60, respectivamente. El tamaño medio de las truchas consumidas por las nutrias fue mayor que el de las consumidas por el visón europeo. Palabras clave: Visón europeo (Mustela lutreola), Nutria euroasiática (Lutra lutra), Gineta común (Genetta genetta), Dieta, España

    La Loutre d'Europe, Lutra lutra, de retour sur la Sèvre Nantaise

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    After 1985, the otter (Lutra lutra) was not found any more on the Sèvre Nantaise (France). From 1997, a careful exploration revealed presence signs of its presence showing the coming back of this mammal

    The genome sequence of the Eurasian river otter, Lutra lutra Linnaeus 1758 [version 1; peer review: 2 approved]

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    We present a genome assembly from an individual male Lutra lutra (the Eurasian river otter; Vertebrata; Mammalia; Eutheria; Carnivora; Mustelidae). The genome sequence is 2.44 gigabases in span. The majority of the assembly is scaffolded into 20 chromosomal pseudomolecules, with both X and Y sex chromosomes assembled

    The genome sequence of the Eurasian river otter, Lutra lutra Linnaeus 1758.

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    We present a genome assembly from an individual male Lutra lutra (the Eurasian river otter; Vertebrata; Mammalia; Eutheria; Carnivora; Mustelidae). The genome sequence is 2.44 gigabases in span. The majority of the assembly is scaffolded into 20 chromosomal pseudomolecules, with both X and Y sex chromosomes assembled

    Molecular ecology of european mustelids: Unraveling evolutionary and ecological patterns in Martes and Lutra genera

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    208 p.El objetivo principal de esta tesis es la aplicación de técnicas moleculares para estudiar la genética de poblaciones, la idoneidad y uso de hábitat (habitat suitability) o la filogenia intraespecífica de tres mustélidos europeos; la nutria (Lutra lutra), la marta europea (Martes martes) y la garduña (M. foina). La tesis está dividida en cuatro capítulos. La introducción (capítulo 1) proporciona un marco general de la tesis, en la que se describen y relacionan las principales subdisciplinas de la ecología molecular y la idoneidad de hábitat. Después, repaso los trabajos más significativos sobre las especies de los géneros Lutra y Martes para contextualizar los 5 artículos específicos incluidos a continuación. 1) Individual identification and distribution assessment of otters (Lutra lutra) through non-invasive genetic sampling: Recovery of an endangered species in the Basque Country (Northern Spain). 2) Shaken but not stirred: Multiscale habitat suitability modeling of two sympatric marten species (Martes martes and Martes foina) in the northern Iberian Peninsula. 3) Distribution and habitat use by pine marten in a riparian corridor crossing intensively cultivated lowlands. Presentado como apéndice. 4) Inferring population genetic structure in widely and continuously distributed carnivores: the stone marten (Martes foina) as a case study. 5) Phylogeography and population genetic structure of the stone marten (Martes foina) in Europe. Las conclusiones extraídas a partir de los diferentes trabajos abordados se han incluido en el capítulo final

    Circadian/Seasonal rhythms of the red swamp crayfish and crayfish size selection by eurasian otters at Cecebre reservoir

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    [Resumen]: El presente trabajo describe los ritmos estacionales del cangrejo rojo de las marismas o cangrejo americano, Procambarus clarkii (Girad 1852) y analiza si existe selección del cangrejo en función del tamaño por parte de la nutria euroasiática Lutra lutra (Linnaeus 1758), en el embalse de Abegondo-Cecebre. Los resultados indicaron que los cangrejos americanos son mucho más abundantes en los periodos cálidos frente a los periodos fríos y que la nutria no consume los cangrejos de talla media disponibles en el medio, sino que selecciona los cangrejos de mayor longitud, optimizando probablemente la relación beneficio/esfuerzo.[Resumo]: O presenta traballo trata de describir os ritmos estacionais do cangrexo roxo das marismas o cangrexo américano, Procambarus clarkii (Girad 1852) e analiza se existe selección do cangrexo en función do tamaño por parte da lontra euroasiática Lutra Lutra (Linnaeus 1758), en el embalse de Abegondo – Cecebre. Os resultados indicaron que os cangrexos son máis abundantes nos periodos cálidos ou secos que nos fríos ou húmidos e que a lontra no embalse de cecebre selecciona os cangrexos de maior lonxitude e polo tanto no consume cangrexos de talla media, que son os máis dispoñibles no medio.[Abstract]: This work describes the seasonal rhythms of the Red Swamp Crayfish, Procambarus clarkii (Girad 1852) at the Cecebre reservoir (NW Spain). Secondly I studied whether there is selection of crayfish size by Eurasian otters Lutra lutra (Linnaeus 1758) or not. Our results indicate that Red swamp crayfish is more abundant during the warmer periods than during colder periods and that otters select larger red swamp crayfish optimizing Benefit/cost relationships.Traballo fin de grao (UDC.CIE). Bioloxía. Curso 2017/201

    Inorganic elements in the livers of Eurasian otters, Lutra lutra, from England and Wales in 2007 & 2008: a Predatory Bird Monitoring Scheme (PBMS) report

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    This is a report on the initial findings of a collaborative study between the Predatory Bird Monitoring Scheme (PBMS) and the Cardiff University Otter Project (CUOP). The study analysed the concentrations of 16 metals and semi-metals in the livers of 107 Eurasian otters (Lutra lutra) that had been found dead in 2007 and 2008 and collected by the CUOP. This aim of this work was to determine the current concentrations of inorganic elements accumulated by otters and whether exposure to heavy metals (lead, mercury, cadmium) in particular is likely to be associated with adverse effects. This is the first study of inorganic elements in otter livers from Europe for nearly 10 years. The otters that were analysed were from England and Wales and included adult and subadult males and females. Liver tissue was analysed using Inductively Coupled Plasma mass spectrometry (ICP-MS) techniques. The concentrations of inorganic elements measured in the present study were within the range previously reported for Eurasian otters in Britain and elsewhere in Europe. Concentrations varied with age and/or sex for some elements. For the heavy metals mercury and cadmium, liver concentrations generally increased with age whereas for lead, juveniles generally had higher liver lead concentrations than adults although for lead these difference were not statistically significant. Aluminium and chromium were the only elements that varied significantly in concentrations between years. It is unclear whether the inter-year variation in aluminium and chromium represent significant inter-year changes in exposure and/or accumulation or may simply reflect local-scale variation in the provenance of otters and their associated exposure. The liver concentrations of heavy metals (mercury, cadmium and lead) in all the otters analysed were below those associated with toxic effects in mammals, although liver lead concentrations in a small number of otters were close to the level of concern
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