South East Fishery (SEF) Ecosystem Study 1993-1996: Focussed habitat sampling - Gillnet and Fish Trap (Starfire 1997)

Focussed habitat re-sampling of macrohabitats (defined by bottom type, soft hard or rough) in three mesohabitats (key study areas presenting a variety of shelf habitats described by fishers) using gillnets and traps from a commercial vessel. Gillnets were deployed and retrieved at dawn and dusk giving near equal day/night soaking times. 19 deployments yielded 6,457 fish and squid weighing nearly 4 t. Fish and crab traps were set during the day only, yielding 979 fish specimens (589 kg) and squids and hermit crabs weighing 673 kg in total.

本数据集针对三类中观生境（mesohabitat）——即由渔民描述的、涵盖多种陆架生境的核心研究区域——内的宏生境（macrohabitat，以底质类型划分为软质、硬质或粗糙底质）开展针对性生境重采样，采样作业依托商用渔船，采用刺网（gillnets）与陷阱渔具实施。刺网于黎明与黄昏时段完成布设与回收，确保昼夜浸泡时长近乎均等。本次采样共完成19次布设作业，累计捕获6457尾鱼类与鱿鱼，总重量近4吨。鱼类与蟹类陷阱仅于日间布设，共获取979尾鱼类标本（总重589千克），以及总重673千克的鱿鱼与寄居蟹。