Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- 1 Adaptations to the semi-aquatic habit and habitat
- 2 Physiological challenges in semi-aquatic mammals: swimming against the energetic tide
- 3 Diving capacity and foraging behaviour of the water shrew (Neomys fodiens)
- 4 Habitat use by water shrews, the smallest of amphibious mammals
- 5 The importance of the riparian environment as a habitat for British bats
- 6 A preliminary study of the behaviour of the European mink Mustela lutreola in Spain, by means of radiotracking
- 7 The demography of European otters Lutra lutra
- 8 Habitat use and conservation of otters (Lutra lutra) in Britain: a review
- 9 The relationship between riverbank habitat and prey availability and the distribution of otter (Lutra lutra) signs: an analysis using a geographical information system
- 10 Influence of altitude on the distribution, abundance and ecology of the otter (Lutra lutra)
- 11 Diets of semi-aquatic carnivores in northern Belarus, with implications for population changes
- 12 Otter (Lutra lutra) prey selection in relation to fish abundance and community structure in two different freshwater habitats
- 13 Diet, foraging behaviour and coexistence of African otters and the water mongoose
- 14 Feeding ecology of the smooth-coated otter Lutra perspicillata in the National Chambal Sanctuary, India
- 15 Population trends of hippopotami in the rivers of the Kruger National Park, South Africa
- 16 Reproductive strategies of female capybaras: dry-season gestation
- 17 The continuing decline of the European mink Mustela lutreola: evidence for the intraguild aggression hypothesis
- 18 Otters and pollution in Spain
- 19 The rapid impact of resident American mink on water voles: case studies in lowland England
- 20 Status, habitat use and conservation of giant otter in Peru
- Index
7 - The demography of European otters Lutra lutra
Published online by Cambridge University Press: 03 May 2010
- Frontmatter
- Contents
- List of contributors
- Preface
- 1 Adaptations to the semi-aquatic habit and habitat
- 2 Physiological challenges in semi-aquatic mammals: swimming against the energetic tide
- 3 Diving capacity and foraging behaviour of the water shrew (Neomys fodiens)
- 4 Habitat use by water shrews, the smallest of amphibious mammals
- 5 The importance of the riparian environment as a habitat for British bats
- 6 A preliminary study of the behaviour of the European mink Mustela lutreola in Spain, by means of radiotracking
- 7 The demography of European otters Lutra lutra
- 8 Habitat use and conservation of otters (Lutra lutra) in Britain: a review
- 9 The relationship between riverbank habitat and prey availability and the distribution of otter (Lutra lutra) signs: an analysis using a geographical information system
- 10 Influence of altitude on the distribution, abundance and ecology of the otter (Lutra lutra)
- 11 Diets of semi-aquatic carnivores in northern Belarus, with implications for population changes
- 12 Otter (Lutra lutra) prey selection in relation to fish abundance and community structure in two different freshwater habitats
- 13 Diet, foraging behaviour and coexistence of African otters and the water mongoose
- 14 Feeding ecology of the smooth-coated otter Lutra perspicillata in the National Chambal Sanctuary, India
- 15 Population trends of hippopotami in the rivers of the Kruger National Park, South Africa
- 16 Reproductive strategies of female capybaras: dry-season gestation
- 17 The continuing decline of the European mink Mustela lutreola: evidence for the intraguild aggression hypothesis
- 18 Otters and pollution in Spain
- 19 The rapid impact of resident American mink on water voles: case studies in lowland England
- 20 Status, habitat use and conservation of giant otter in Peru
- Index
Summary
Introduction
This paper presents data on the demography of populations of European otters Lutra lutra from various parts of the British Isles. The emphasis is on age structure and patterns of mortality.
Otters have declined sharply in Britain over the last few decades, probably largely as a result of contamination by organochlorine pesticides (Mason & Macdonald, 1986; Jefferies, 1989). A similar decline has taken place in many parts of Europe and the species is now extinct in several countries. However, following the withdrawal of a number of pesticides in the UK the otter is now, very slowly, returning to areas from which it had disappeared (Green & Green, 1987; Strachan et al, 1990; Andrews et al, 1992).
A problem that has plagued research on the effects of pollution on populations of otters has been a lack of basic information on demography. In particular, in the absence of animals of known age it has been difficult to answer such pertinent questions as whether or not chemical contaminants accumulate in the bodies of otters as they age. Equally, a knowledge of demographic parameters is important in predicting the rates at which otter populations might recover in the future.
Our aims are:
To discuss the methods and associated problems of analysing otter demography.
To present data on patterns of mortality and longevity for populations from different areas of the UK.
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- Information
- Behaviour and Ecology of Riparian Mammals , pp. 107 - 118Publisher: Cambridge University PressPrint publication year: 1998
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