Diet and distribution of the Eurasian otter, Lutra lutra and American mink, Neovison vison on the River Hull

Teagle, Hannah

Abstract

Conflict between the invasive American mink Neovison vision, and native Eurasian otter Lutra lutra has been identified in several studies, however many questions remain surrounding factors contributing to possible co-existence. Furthermore, each species presence poses possible further economic and ecological threats. Links between mink predation and water vole, Arvicola amphibius decline have been listed as a key factor in the vole’s high risk categorisation. Understanding of mink preference to endangered species therefore may be essential in future conservation efforts. In contrast, otter-human conflict has potential to negatively impact upon efforts to restore otter populations. Regular spraint collection and eDNA analysis have been combined to identify distribution, diet and species specific preferences. Whilst distribution analysis did not support the possibility of co-existence, mink diet has identifiably evolved to reduce conflict with otters in the region. Within this, mink were found to predate on endangered species, supporting removal efforts. Contrastingly, otter preference data was not concluded to display a preference for stocked species.

Citation

Teagle, H. Diet and distribution of the Eurasian otter, Lutra lutra and American mink, Neovison vison on the River Hull. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4223844

• Thesis Type: Thesis
• Deposit Date: Jan 26, 2022
• Publicly Available Date: Feb 24, 2023
• Keywords: Biological sciences
• Public URL: https://hull-repository.worktribe.com/output/4223844
• Additional Information: Department of Biological & Marine Science, The University of Hull
• Award Date: Oct 1, 2020