Monitoring the Bullhead - European Commission

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Conserving Natura 2000 Rivers Standard monitoring methods and a coherent assessment and reporting framework are essential to allow results to be both compared and aggregated within and across EU member states. While the directive outlines the data reporting required from member states at a national level, it did not set out detailed assessment techniques for data collection at habitat and species level. The Conserving Natura 2000 Rivers series of monitoring protocols seeks to identify monitoring methods and sampling strategies for riverine species and the Ranunculus habitat type that are fieldtested, cost-effective, and founded on best scientific knowledge. Titles in the monitoring and ecology series are listed inside the back cover of this report, and copies of these, together with other project publications, are available on the project website: www.riverlife.org.uk. 2
Contents Monitoring the Bullhead Executive summary 5 1 Introduction 7 2 Ecology of the bullhead 7 3 Existing monitoring methods 8 4 Sampling protocols for bullheads 9 4.1 Site selection 9 4.2 Number of sites and frequency of sampling 10 4.3 Sampling procedure 12 4.4 Results and reporting 14 4.5 Pre-survey protocols 16 5 Assessment of conservation status 16 5.1 Abundance classification 16 5.2 Population demographic structure 16 6 Case studies – the Rivers Eden and Teifi 18 6.1 River Eden 18 6.2 Afon Teifi 19 6.3 Assessment of number of sampling sites 19 7 Survey programming 20 Acknowledgements 20 References 21 Appendix 1: Survey report 22 Appendix 2: HABSCORE data input sheet 23 Appendix 3: Density estimates of bullheads in River Eden catchment 25 Appendix 4: Density estimates of bullheads in Afon Teifi catchment 26 3
Page 1 and 2: Monitoring the Bullhead Cottus gobi
Page 3: Conserving Natura 2000 Rivers This
Page 7 and 8: Executive summary Background The Eu
Page 9 and 10: 1 Introduction Managing fish specie
Page 11 and 12: depletion were often dominated by l
Page 13 and 14: or even 3 are deemed acceptable (Co
Page 15 and 16: on the Eden in 2002, if incorporati
Page 17 and 18: Table 1. Environmental variables an
Page 19 and 20: Figure 1. Distribution of densities
Page 21 and 22: 6.2 Afon Teifi 6.2.1 Site selection
Page 23 and 24: References Monitoring the Bullhead
Page 25 and 26: Appendix 2. HABSCORE data input she
Page 27 and 28: Appendix 3. Density estimates (m 2)
Page 29 and 30: Ecology Series Conserving Natura 20

Monitoring the Bullhead - European Commission

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