Genetic structure of otter (Lutra lutra) populations from two fishpond systems in Hungary

Lanszki, József; Hidas, A.; Szentes, Katalin; Révay, Tamás; Lehoczky, István; Jeney, Zsigmond; Weiss, Steven

doi:10.1016/j.mambio.2009.09.006

Cited by 15 publications

(10 citation statements)

References 20 publications

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“…Recent studies in Germany (Kalz et al. 2006) and Hungary (Lanszki et al. 2010) yielded expected heterozygosities between 0.63 and 0.68, and for British otters, Dallas et al.…”

Section: Discussionmentioning

confidence: 98%

Genetic structure of Eurasian otter (Lutra lutra, Carnivora: Mustelidae) populations from the western Baltic sea region and its implications for the recolonization of north-western Germany

Honnen¹,

Petersen²,

Kaßler³

et al. 2010

Journal of Zoological Systematics and Evolutionary Research

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We analysed 229 Eurasian otters from eastern and north-western Germany, Denmark and southern Sweden based on sequences of the mtDNA control region and genotypes at 12 polymorphic nuclear microsatellite loci. The main focus of the study lay on the north-west German otters from Schleswig-Holstein, which represent a newly established and expanding population recolonizing a formerly inhabited region, thereby closing the distributional gap between the large eastern population and the long-isolated and genetically depleted Danish population. As found before in this species, mtDNA variability was very low but we identified a hitherto unknown haplotype in Sweden. Expected heterozygosities were between 0.46 and 0.69 and thus within the range known from the literature. There were only weak signs of a founder effect in the Schleswig-Holstein otters with respect to allelic diversity (but not heterozygosity). Nevertheless, there was a statistically significant bottleneck signal based on deviations from mutation-drift equilibrium in Schleswig-Holstein. All statistical approaches (amovas, factorial correspondence analysis, assignment tests and Bayesian structure analysis) unequivocally showed that north-western Germany has so far been predominantly recolonized by otters of east German origin, but we also found evidence of admixture through immigration from Denmark. Both the Danish and the north-west German otter population will benefit from further exchange in the wake of the ongoing range expansion.

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“…Recent studies in Germany (Kalz et al. 2006) and Hungary (Lanszki et al. 2010) yielded expected heterozygosities between 0.63 and 0.68, and for British otters, Dallas et al.…”

Section: Discussionmentioning

confidence: 98%

Genetic structure of Eurasian otter (Lutra lutra, Carnivora: Mustelidae) populations from the western Baltic sea region and its implications for the recolonization of north-western Germany

Honnen¹,

Petersen²,

Kaßler³

et al. 2010

Journal of Zoological Systematics and Evolutionary Research

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“…If the actual number was not underestimated, we captured most resident individuals, which can be explained by the high sampling intensity. Most studies estimating otter densities were conducted at rivers, streams, or ditches [ 10 , 30 , 58 – 60 ], some at lakes or coasts [ 1 , 25 , 61 ], but only a few in fish pond landscapes [ 15 , 27 ] ( Table 3 ). While densities seem to be lower at rivers and lakes than in fish pond landscapes ( Table 3 ), one needs to bear in mind that comparability is limited because of different methods and water body shapes.…”

Section: Discussionmentioning

confidence: 99%

Non-Invasive Genetic Mark-Recapture as a Means to Study Population Sizes and Marking Behaviour of the Elusive Eurasian Otter (Lutra lutra)

et al. 2015

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Quantifying population status is a key objective in many ecological studies, but is often difficult to achieve for cryptic or elusive species. Here, non-invasive genetic capture-mark-recapture (CMR) methods have become a very important tool to estimate population parameters, such as population size and sex ratio. The Eurasian otter (Lutra lutra) is such an elusive species of management concern and is increasingly studied using faecal-based genetic sampling. For unbiased sex ratios or population size estimates, the marking behaviour of otters has to be taken into account. Using 2132 otter faeces of a wild otter population in Upper Lusatia (Saxony, Germany) collected over six years (2006–2012), we studied the marking behaviour and applied closed population CMR models accounting for genetic misidentification to estimate population sizes and sex ratios. We detected a sex difference in the marking behaviour of otters with jelly samples being more often defecated by males and placed actively exposed on frequently used marking sites. Since jelly samples are of higher DNA quality, it is important to not only concentrate on this kind of samples or marking sites and to invest in sufficiently high numbers of repetitions of non-jelly samples to ensure an unbiased sex ratio. Furthermore, otters seemed to increase marking intensity due to the handling of their spraints, hence accounting for this behavioural response could be important. We provided the first precise population size estimate with confidence intervals for Upper Lusatia (for 2012: = 20 ± 2.1, 95% CI = 16–25) and showed that spraint densities are not a reliable index for abundances. We further demonstrated that when minks live in sympatry with otters and have comparably high densities, a non-negligible number of supposed otter samples are actually of mink origin. This could severely bias results of otter monitoring if samples are not genetically identified.

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“…La medición de densidades por unidad de superficie en el agua es una tarea que por su dificultad raramente se ha acometido (Kruuk 1995, Sulkava 2007, RuizOlmo et al 2011. Recientemente se han utilizado técnicas genéticas (Hung et al 2004, Prigioni 2006, Prigioni & Remonti 2006, Arrendal et al 2007, Hájková et al 2008, Koelewijn & Pérez-Haro 2010, Lanszki et al 2010) y métodos de captura-recaptura basada en identificación de genotipos (Lampa et al 2013) pero también muestran ciertas limitaciones relacionadas con la técnica y el coste del análisis que limita el número de muestras y con ello la precisión. Asimismo se ha descrito la metodología del fototrampeo para la detección de la especie (Jones & Raphael 1993).…”

Section: Introductionunclassified

Estima de la población de nutria en las Tablas de Daimiel mediante captura-recaptura espacial y muestreo de distancias

Jiménez¹,

Carrasco²,

Feliu³

2014

Galemys

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Species management should be based on accurate estimations on the size and density of the target population. In the case of the otter, these estimations are difficult to obtain due to their habitat, low densities and elusiveness, and these have relied mainly on surveys of animal signs or on specific ad hoc methods, and lately, in genotyping. We have applied newly-developed spatial capture-recapture model to estimate the otter population of the Tablas de Daimiel National Park by a spatially explicit capture-recapture of unmarked individuals using camera trapping-data together with distance sampling. The density estimated is 0.557 (±0.317) otters/100 ha, and we have achieved reliable information about activity, movements, and space use.

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Genetic structure of otter (Lutra lutra) populations from two fishpond systems in Hungary

Cited by 15 publications

References 20 publications

Genetic structure of Eurasian otter (Lutra lutra, Carnivora: Mustelidae) populations from the western Baltic sea region and its implications for the recolonization of north-western Germany

Genetic structure of Eurasian otter (Lutra lutra, Carnivora: Mustelidae) populations from the western Baltic sea region and its implications for the recolonization of north-western Germany

Non-Invasive Genetic Mark-Recapture as a Means to Study Population Sizes and Marking Behaviour of the Elusive Eurasian Otter (Lutra lutra)

Estima de la población de nutria en las Tablas de Daimiel mediante captura-recaptura espacial y muestreo de distancias

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