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The Eurasian Beaver Handbook

The Eurasian Beaver Handbook

Roisin Campbell-Palmer | Derek Gow | Gerhard Schwab | Duncan Halley | John Gurnell | Simon Girling | Skip Lisle | Ruairidh Campbell | Helen Dickinson | Simon Jones | Howard Parker | Frank Rosell

(2016)

Abstract

Beavers are widely recognised as a keystone species which play a pivotal role in riparian ecology. Their tree felling and dam building behaviours coupled with a suite of other activities create a wealth of living opportunities that are exploited by a range of other species. Numerous scientific studies demonstrate that beaver-generated living environments that are much richer in terms of both biodiversity and biomass than wetland environments from which they are absent. Emerging contemporary studies indicate clearly that the landscapes they create can afford sustainable, cost-effective remedies for water retention, flood alleviation, silt and chemical capture.

Beaver activities, especially in highly modified environments, may be challenging to certain land use activities and landowners. Many trialled and tested methods to mitigate against these impacts, including a wide range of non-lethal management techniques, are regularly implemented across Europe and North America. Many of these techniques will be new to people, especially in areas where beavers are newly re-establishing. This handbook serves to discuss both the benefits and challenges in living with this species, and collates the wide range of techniques that can be implemented to mitigate any negative impacts.

The authors of this handbook are all beaver experts and together they have a broad range of scientific knowledge and practical experience regarding the ecology, captive husbandry, veterinary science, pathology, reintroduction and management of beavers in both continental Europe and Britain.


The authors of this handbook are experienced in working with both wild and captive beavers. This collaboration has involved a truly international range of experts. Their breadth of experience (constituting 201 years between them) and abilities range from academics actively involved in research to wildlife managers working in the field on mitigation and conservationists promoting beaver reintroduction.


Beavers are coming back! Across much their European range from where centuries ago these animals were rendered extinct, successful reintroductions mean that once more these fascinating mammals can be seen in the wild. We know more and more about the benefits of beaver reintroductions, from helping to moderate river flow to improved water quality and from positive impacts on fish populations to the creation of habitats that benefit a range of other wildlife species. While some have expressed concerns about the effects of beavers, for example on trees and flood risk, this comprehensive new guide presents the state of the art of knowledge to enable the full spectrum of benefits to be realised. The Eurasian Beaver Handbook marks an exciting moment for conservation and I hope the different groups with an interest in beavers will make the most of it.


Dr Tony Juniper, naturalist, conservationist and writer

"Hurrah! At last, a factual and pragmatic guide to why we should have beavers in Britain and how we can live with them."


Chris Packham

The authors of this handbook include many of the most significant names in beaver conservation in Europe, drawing on a wide range of experiences and perspectives, which gives this book great depth and insight.... For me, working on the River Otter Beaver Trial here in Devon, this book is already providing a quick reference guide which I’m finding easy to use and full of valuable information. It is well organised and referenced and will become vital for those managing land which beavers recolonise in the decades ahead.


Mark Elliott

... I recommend Eurasian Beaver Handbook for land managers, policy writers, and landowners interested in managing European landscapes that include, or may potentially include, beavers. ... Although this book focuses on the European beaver, practitioners in North America also could benefit from reading this book to compare management styles, tools, and techniques.


Jimmy D. Taylor, USDA Animal and Plant Health Inspection Service, National Wildlife Research Center

Table of Contents

Section Title Page Action Price
TItle Page v
Contributors x
Foreword xi
Rhagair xii
Acknowledgements xiv
1. Introduction 1
1.1 Aims and purpose of this handbook 4
2. The history of beavers in Britain 5
2.1 Beaver reintroduction in Britain 6
3. Beaver biology and ecology 9
3.1 Taxonomy and distribution 9
3.2 Anatomy and appearance 11
3.3 Breeding and young 12
3.4 Habitat and territoriality 13
3.5 Diet and feeding 14
3.6 Behaviours 15
3.7 Parasites and diseases 18
3.8 Population biology 19
3.9 North American beaver introductions 22
4. Legislation 24
5. Effects of beavers 32
5.1 Beavers as ecosystem engineers 33
5.2 Beavers and species of high conservation value 35
5.3 Beaver effects at a catchment scale 38
5.4 Beavers in landscape-restoration projects 40
5.5 Beavers and managed land use 41
5.5.1 Agriculture 44
5.5.2 Horticulture 46
5.5.3 Woodland and forestry 46
5.5.4 Fisheries 52
5.5.5 Engineered environments 55
5.5.6 Recreational areas and water bodies 61
6. Managing beaver impacts 63
6.1 Damming activity and associated management techniques 65
6.1.1 Ecology 65
6.1.2 Benefits 66
6.1.3 Issues 67
6.1.4 Management options 68
6.1.5 Animal-welfare considerations 79
6.2 Burrowing and associated activities 79
6.2.1 Ecology 79
6.2.2 Benefits 79
6.2.3 Issues 80
6.2.4 Management options 80
6.2.5 Animal-welfare considerations 82
6.3 Foraging activity and associated management techniques 83
6.3.1 Ecology 83
6.3.2 Benefits 83
6.3.3 Issues 84
6.3.4 Management options 84
6.3.5 Animal-welfare considerations 89
6.4 Animal management 89
6.4.1 Ecology 90
6.4.2 Benefits 90
6.4.3 Issues 91
6.4.4 Management options 91
6.4.5 Animal-welfare considerations 100
7. Survey and monitoring 103
7.1 Non-invasive monitoring techniques 103
7.2 Habitat suitability/habitat-use survey 104
7.3 Monitoring beaver population size and development 106
7.4 Distribution mapping and population estimates 107
7.5 Habitat assessment prior to beaver release 109
8. Learning to live with beavers 111
8.1 Future management recommendations 111
8.2 Public relations, education and socioeconomics 113
8.3 Conclusion 117
Appendix A 119
A.1 Teeth marks 119
A.2 Felled and gnawed trees 119
A.3 Ring-barking/ bark stripping 120
A.4 Grazed lawns and cut vascular plants 121
A.5 Feeding stations 121
A.6 Foraging trails 122
A.7 Lodges and burrows 123
A.8 Food caches 126
A.9 Dams 126
A.10 Canals 127
A.11 Scent mounds 128
A.12 Faeces 128
A.13 Tracks 128
Appendix B\nDiseases and parasites of the Eurasian beaver 131
B.1 Parasites 131
B.2 Bacteria 134
B.3 Fungi 134
B.4 Yeasts 135
B.5 Viruses 135
Appendix C 136
C.1 Flow devices – dam piping 136
C.2 Flow devices – culvert protection 139
C.3 Dam-removal/dam-notching 142
C.4 Burrow management 143
C.5 Bank and flood-bank wall protection 144
C.6 Individual tree protection 146
C.6.1 Mesh protection 146
C.6.2 Paint protection 147
C.7 Electric fencing 148
C.8 Permanent exclusion fencing 149
C.9 Deterrent fencing – ditches and small streams 150
C.10 Trapping and translocation 153
C.10.1 Bavarian beaver traps 153
C.10.2 Boat trapping 156
C.11 Humane dispatch 157
Appendix D\nManagement protocol chart 159
Appendix E\nCaptive beaver fencing recommendations 161
Appendix F\nTerminology for various beaver management devices 162
Appendix G\nBeaver fieldwork risk assessment 164
Appendix H\nBeaver survey data sheets from the Scottish Beaver Trial 166
References 169
Glossary 185
Index 188