A direction-sensitive underwater blast detector and its application for managing blast fishing |
| |
| Authors: | Woodman George H Wilson Simon C Li Vincent Y F Renneberg Reinhard |
| |
| Institution: | Teng Hoi Conservation Organization, 18 Sun King Terrace, Sai Kung, Kowloon, Hong Kong. george@tenghoi.org |
| |
| Abstract: | Little is known about the spatial and temporal distribution of blast fishing which hampers enforcement against this activity. We have demonstrated that a triangular array of hydrophones 1 m apart is capable of detecting blast events whilst effectively rejecting other sources of underwater noise such as snapping shrimp and nearby boat propellers. A total of 13 blasts were recorded in Sepangor bay, North of Kota Kinabalu, Sabah, Malaysia from 7th to 15th July 2002 at distances estimated to be up to 20 km, with a directional uncertainty of 0.2 degrees . With such precision, a network of similar hydrophone arrays has potential to locate individual blast events by triangulation to within 30 m at a range of 10 km. |
| |
| Keywords: | Fishery management Reefs Blast fishing Destructive fishing practices Fish bombing Underwater explosions |
| 本文献已被 ScienceDirect PubMed 等数据库收录！ |
