Current status of mobile and static sampling gears used in resource surveys

摘要

The broad conclusion of this session on survey gears was that much work remains to be done, but that we are developing the tools and methodologies to address the key issues. Survey planners are being asked to answer an increasingly wider range of questions, and this expansion of responsibilities will affect our choice of gears and our analysis of the data. In particular, we need to: (ⅰ) Understand the priorities for these surveys; abundance estimation, biodiversity, ecosystem monitoring, etc.; (ⅱ) Understand the factors that affect our gear performance and how to deal with these effects, either by improving the gear or dealing with the variance analytically; (ⅲ) Have a good understanding of how fish (and other species) behaviour affects our results; (ⅳ) Make better use of models and laboratory-based research to focus our limited potential for field studies; (ⅴ) Continue to develop alternative gears to provide a wider perspective than trawling alone can provide; and (ⅵ) Have common standards for data collection and analyses.