Tasmanian Seamounts Study 1997: Photographic Transects

This record describes the photographic transect survey data collected as part of the Tasmanian Seamounts Study undertaken by CSIRO Division of Fisheries in January 1997. Ten photographic transects were made from the base to pinnacle of 4 out of 14 seamounts in the survey area, approx. 100 km to the south of Tasmania, using a Photosea 2000 stereoscopic deepsea camera system, in water depths ranging from 2180 m to 714 m. The transects were typically oriented N-S and E-W on each seamount, with 2 transects replicated. Between 67 and 150 photos were taken per transect, at a mean range between photos of 27 m, at heights of 1 to 4 m off the bottom. The photographs were later assessed for percent cover by a range of bottom types, and for numbers of recognisable organisms of particular types. In 2008/09 the slide images were scanned and re-assessed for fauna and sediment types for comparison with image data collected on voyages SS11 / 2006 and SS2/2007. The image annotations collected for this project have been added to the Oracle data base BHIMAGE and the associated videos and still images have been archived as described in MarLIN record 14436 'Benthic Habitats Video Image Archive'.

本数据集记录了1997年1月由澳大利亚联邦科学与工业研究组织（CSIRO）渔业部门开展的塔斯马尼亚海山研究（Tasmanian Seamounts Study）所收集的摄影样带调查（photographic transect survey）数据。本次调查区域位于塔斯马尼亚以南约100公里海域，共对调查区内14座海山中的4座完成调查，从海山基底至海山尖顶共布设10条摄影样带。调查采用Photosea 2000型立体深海摄像系统（Photosea 2000 stereoscopic deepsea camera system），作业水深范围为2180米至714米。每条海山的样带朝向通常为南北向与东西向，其中2条样带进行了重复布设。单条样带的拍摄照片数量介于67至150张之间，照片间的平均间距为27米，拍摄高度距海底1至4米。后续研究人员对所拍摄的照片开展评估工作，统计了各类海底底质的覆盖百分比，以及各类可识别生物的个体数量。2008/2009年度，研究人员对本次调查的幻灯片影像进行了扫描，并重新评估了其中的动物群与沉积物类型，以用于与SS11/2006和SS2/2007航次采集的影像数据开展对比分析。本项目收集的影像注释数据已录入Oracle数据库BHIMAGE，相关视频与静态影像已按照MarLIN记录14436《底栖生境视频影像档案》（Benthic Habitats Video Image Archive）中的要求完成归档存储。