A pilot study to evaluate the use of electronic monitoring on a Bering Sea groundfi sh factory trawler

4 Introduction 5 Materials and methods 6 Pilot vessel 6 Description of video monitoring system 6 Installation of video monitoring system 8 Installation plan 8 Assessment of system performance 10 Halibut marking experiment 10 Catch monitoring 13 Video monitoring system evaluation 14 Results 14 Research cruise summary 14 Data collection summary 15 Adjustments to camera placement 15 Halibut marking experiments 16 Catch monitoring 23 Video monitoring system evaluation 24 Discussion 25 Technology assessment 25 Halibut tagging experiments 27 Possible uses of the technology 28 Conclusions 29 References 29 Acknowledgements 30