SWFSC Marine Mammal Survey, PODS 1992, Cruise 1468

Original provider: NOAA Southwest Fisheries Science Center (SWFSC) Dataset credits: Marine Mammal and Turtle Division, Southwest Fisheries Science Center, NMFS, NOAA Abstract: This 1992 line-transect survey was designed to make abundance estimates of the central stock of common dolphin, <i>Delphinus delphis</i>, in the eastern Pacific. This stock of dolphin is taken in the tropical tuna fishery and has suffered a substantial decline. Previous surveys covering larger areas have permitted estimates of abundance, but with low precision. This survey was conducted by the NOAA Southwest Fisheries Science Center aboard NOAA Ships <i>David Starr Jordan</i> and <i>McArthur</i> for a combined total of approximately 32,000 kilometers surveyed from late July to early November 1992. This dataset provides the time-date and geographical coordinates, by species/stock, of all cetaceans detected during the survey, as well as the daily and intra-daily start and end points of the line-transect survey by the NOAA Ship <i>David Starr Jordan</i>.原始提供方： 美国国家海洋和大气管理局（NOAA）西南渔业科学中心（SWFSC） 数据集鸣谢： 美国国家海洋和大气管理局（NOAA）国家海洋渔业局（NMFS）西南渔业科学中心海洋哺乳动物与海龟分部 摘要： 本次1992年线断面调查旨在估算东太平洋普通海豚（Delphinus delphis）中部种群的丰度。该海豚种群因热带金枪鱼渔业捕捞而出现种群数量大幅下降。此前覆盖范围更广的调查虽可实现种群丰度估算，但精度较低。本次调查由NOAA西南渔业科学中心依托“大卫·斯塔尔·乔丹号”（David Starr Jordan）与“麦克阿瑟号”（McArthur）两艘NOAA科考船开展，于1992年7月下旬至11月上旬完成总航程约32000公里的调查作业。本数据集提供了本次调查中检测到的所有鲸类的物种/种群信息、对应时间-日期及地理坐标，同时还包含“大卫·斯塔尔·乔丹号”科考船开展线断面调查的每日及日内起止点位数据。