A comparison of the precision and accuracy of estimates of reef-fish lengths determined visually by divers with estimates produced by a stereo-video system.
作者： Mark Shortis , David Fletcher , Euan Harvey
DOI:
关键词: Accuracy and precision 、 Statistics 、 Fish <Actinopterygii> 、 Fishery 、 Mathematics 、 Mean squared error 、 Ecology 、 Length frequency 、 Coral reef fish
摘要: Visual estimates of reef fish length are a nondestructive and useful way determining the biomass, mean length, or frequency fish. Consequently, visual reef-fish often an important component monitoring programs, many which increasingly use volunteers. We compared plastic silhouettes determined visually by experienced scientific novice SCUBA divers. Novice divers showed similar level accuracy (mean error: 2.3 cm) to that 2.1 cm). Significant improvements in precision were provided stereo-video system (0.6 After minimal training hardware software, volunteers can obtain high degree measurement with system, allowing them assist lengths.
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