09-617 Egyptian Goose Final Draft 30-09-2010
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Risk analysis of the Egyptian Goose in The Netherlands A. Gyimesi R. Lensink Risk analysis of the Egyptian Goose in The Netherlands A. Gyimesi R. Lensink commissioned by: ministry of LNV, Invasive Alien Species Team 30 september 2010 report nr 10-029 Status: Final draft Report nr.: 10-029 Date of publication: 30 September 2010 Title: Risk analysis of the Egyptian Goose in The Netherlands Foto omslag M. Bonte Authors: dr. A. Gyimesi drs. ing. R. Lensink Number of pages incl. appendices: 078 Project nr: 09-617 Project manager: drs. ing. R. Lensink Name & address client: Ministry of Agriculture, Nature and Food Quality, Invasive Alien Species Team Postbus 9102, 6700 HC Wageningen Reference client: 29 October 2009, TRCPD 2009 3082 Signed for publication: Teamleider vogelecologie Bureau Waardenburg bv drs. T.J. Boudewijn Initials: Bureau Waardenburg bv is not liable for any resulting damage, nor for damage which results from applying results of work or other data obtained from Bureau Waardenburg bv; client indemnifies Bureau Waardenburg bv against third-party liability in relation to these applications. © Bureau Waardenburg bv / Ministry of Agriculture, Nature and Food Quality, Invasive Alien Species Team This report is produced at the request of the client mentioned above and is his property. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, transmitted and/or publicized in any form or by any means, electronic, electrical, chemical, mechanical, optical, photocopying, recording or otherwise, without prior written permission of the client mentioned above and Bureau Waardenburg bv, nor may it without such a permission be used for any other purpose than for which it has been produced. The Quality Management System of Bureau Waardenburg bv has been certified by CERTIKED according to ISO 9001:2000. 2 Preface Since 1967, when Egyptian Geese Alopochen aegyptiaca bred for the first time in the wild in The Netherlands, this exotic species has largely colonized the country and spread to the surrounding countries as well. In order to understand the success of this species and any possible ecological, economical and social impacts it causes, the Invasive Alien Species Team of the Ministry of Agriculture, Nature and Food Quality has commissioned Bureau Waardenburg to carry out a risk analysis. This risk analysis was carried out by: A. Gyimesi report; P.W. van Horssen GIS; R. Lensink project management and report; T.J. Boudewijn internal check. Dr. T.M. van der Have, Invasive Alien Species Team (LNV), supervised this study. The authors thank all who contributed. SOVON Vogelonderzoek Nederland kindly provided data on Egyptian goose from the: • National breeding census (BMP); • National winterbird census (PTT); • National waterbird census (Watervogeltellingen); • The atlas on breeding birds 1998-2000; • A special goose census in July 2009. We thank Hans Schekkerman, Chris van Turnhout, Berend Voslamber from SOVON for their cooperation in delivering data and discussions in early stages of the project. Popko Wiersma build a model based on habitat suitablity indices, analogues to the model build for other non-native goose species, as done by SOVON in commission of the Invasive Alien Species Team (Ministery of LNV). We were happy to be able to rely on data provided by species experts (A. Bloomfield, F. Majoor, B. Sage, W.R. Siegfried and D. Vangeluwe). We want to thank the following foreign experts for providing information on the status of Egyptian Geese in other countries: • Belgium: Anny Anselin : Research Institute for Nature and Forest; • France: Carol Fouque and Vincent Schricke: Office National de la Chasse et de la Faune Sauvage; • Denmark: Vicky Knudsen: Dansk Ornitologisk Forening; • Switzerland: Verena Keller, Schweizerische Vogelwarte. 3 4 Table of contents Preface................................................................................................................................................3 Table of contents...............................................................................................................................5 Summary ............................................................................................................................................7 Nederlandse samenvatting ...............................................................................................................9 1 Introduction..............................................................................................................................11 1.1 Goals and terms of reference.......................................................................................11 1.2 Methods .......................................................................................................................12 1.3 Structure of the report..................................................................................................12 2 Biology and ecology................................................................................................................13 2.1 Introduction..................................................................................................................13 2.2 Biology and ecology....................................................................................................14 2.2.1 Distribution.....................................................................................................14 2.2.2 Breeding biology...........................................................................................16 2.2.3 Habitat, diet and feeding behaviour...........................................................18 2.2.4 Predators, diseases and other causes of death...........................................19 2.2.5 History as a pest species................................................................................20 3 Established introduced populations .......................................................................................23 3.1 The Netherlands...........................................................................................................23 3.1.1 Breeding population.....................................................................................23 3.1.2 Non-breeding population............................................................................29 3.1.3 Movements....................................................................................................37 3.1.4 Habitat............................................................................................................37 3.1.5 Regulation of numbers.................................................................................38 3.2 England.........................................................................................................................42 3.3 Belgium.........................................................................................................................42 3.4 Germany .......................................................................................................................42 3.5 Elsewhere......................................................................................................................44 3.5.1 In Europe......................................................................................................44 3.5.2 Outside Europe .............................................................................................44 4 Risk analysis ..............................................................................................................................47 4.1 Risk assessment ............................................................................................................47 4.1.1 Probability of introduction............................................................................47 4.1.2. Probability of establishment........................................................................47 5 4.1.3 Probability of spreading ...............................................................................48 4.1.4 Vulnerable areas............................................................................................48 4.1.5 Impact ............................................................................................................49 4.2 Risk-assessment score by the Bomford and the ISEIA method...............................52 4.2.1 Bomford method ..........................................................................................52 4.2.2 ISEIA method ................................................................................................53 4.3 Risk management.........................................................................................................54 4.3.1 Prevention .....................................................................................................54 4.3.2 Eradication......................................................................................................55 4.3.3. Management................................................................................................56 5 Conclusion, discussion and recommendations.....................................................................59 6 Literature ...................................................................................................................................61 Appendix 1 Structure and size of the population Appendix 2 Population estimates based on Habitat Suitability Indices Appendix 3 Risk analysis