DUML coastal surveys on the occurrence, distribution and density of marine mammals in Camp Lejeune 2010-2013

Original provider: Duke University Marine Laboratory Dataset credits: Duke University Marine Laboratory Abstract: This project was part of a monitoring program designed to provide quantitative information on the seasonal occurrence, distribution and density of marine mammals in the coastal waters around the Marine Corps Base Camp Lejeune. The work consisted of three components: (1) coastal line transect surveys, designed to provide estimates of the density of marine mammals and sea turtles in near-shore ocean waters –this dataset; (2) small boat-based photo-identification surveys to document patterns of residency by individual dolphins; and (3) passive acoustic monitoring of the occurrence and distribution of bottlenose dolphins in the New River and coastal waters. We conducted eleven shipboard surveys in the near-shore coastal waters of Onslow Bay from August 2010 to November 2011. We conducted photographic surveys for bottlenose dolphins in the New River on 19 days between October 2010 and November 2011. We recorded 54 sightings throughout the Intracoastal Waterway and New River, with some groups seen as far upriver as Morgan Bay. We conducted seven shipboard surveys in the near-shore coastal waters of Onslow Bay from October 2012 to September 2013.原始提供方：杜克大学海洋实验室（Duke University Marine Laboratory） 数据集贡献方：杜克大学海洋实验室（Duke University Marine Laboratory） 摘要： 本项目为一项监测计划的组成部分，旨在为勒琼营海军陆战队基地周边近岸海域的海洋哺乳动物的季节性出现规律、分布格局与种群密度提供量化研究数据。本次研究包含三项核心内容： (1) 沿岸线样带调查（line transect surveys）：用于估算近岸海域海洋哺乳动物与海龟的种群密度，即本数据集； (2) 小型船只搭载的照片识别调查（photo-identification surveys）：用于记录宽吻海豚（bottlenose dolphins）个体的居留模式； (3) 被动声学监测（passive acoustic monitoring）：用于监测新河（New River）与近岸海域内宽吻海豚的出现情况与分布格局。 我们于2010年8月至2011年11月期间，在昂斯洛湾（Onslow Bay）近岸海域开展了11次船基调查。2010年10月至2011年11月期间，我们在新河针对宽吻海豚开展了19次摄影调查。我们在沿岸航道（Intracoastal Waterway）与新河全域共计记录到54次目击记录，部分海豚群最远可在摩根湾（Morgan Bay）上游河段被观测到。2012年10月至2013年9月期间，我们在昂斯洛湾近岸海域开展了7次船基调查。