期刊
CONSERVATION GENETICS RESOURCES
卷 14, 期 4, 页码 453-461出版社
SPRINGER
DOI: 10.1007/s12686-022-01286-z
关键词
Population size; Density; Microsatellites; Heterozygosity; Haplotype
资金
- Universita degli Studi di Milano within the CRUI-CARE Agreement
Faecal DNA-based genetic analysis is an effective tool for assessing threatened species. The study investigated the population of Eurasian otters in the Sila Massif, Italy using microsatellite analysis and mtDNA sequencing. The findings revealed a small, genetically isolated population that requires special attention and conservation efforts.
Faecal DNA-based genetic analysis is a suitable tool for assessing both population size and genetic diversity of threatened and elusive species. We applied microsatellite analysis and mtDNA sequencing for investigating the southernmost Italian (Sila Massif, Calabria Region) population of the Eurasian otter (Lutra lutra). This relict population, filed as extinct in the mid-1980s, is currently expanding but still quite isolated. On the two main rivers hosting otters permanently since 2014, we collected 47 spraints, out of which 24 (51.1%) were successfully genotyped (on average 2.0 alleles per locus). Thirteen individuals were identified: seven females and three males (sex identification success of 76.9%). Population size was assessed as 16 individuals (13-22), corresponding to a density of 0.15 (0.13-0.21) ind/km. Successfully amplified mtDNA samples (N = 16) confirmed the occurrence of a haplotype-H10-which had been previously reported only for Southern Italy, bringing new evidence of the unicity of the Italian otter population. Although density values complied with those reported for the core area of otter Italian range, the small size and genetic isolation of this population require special attention. To assist the ongoing re-colonisation of the Sila Massif, habitat management should aim to enhance fish availability and connectivity with the core area.
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