DUML New River surveys on the occurrence, distribution and density of marine mammals in Camp Lejeune 2010-2011

Original provider:
Duke University Marine Laboratory

Dataset credits:
Duke University Marine Laboratory

Abstract:
This project was the first phase of a monitoring program designed to provide quantitative information on the seasonal occurrence, distribution and density of marine mammals in estuarine and coastal waters around the Marine Corps Base Camp Lejeune. The work consisted of three components:<br>
(1) coastal line transect surveys, designed to provide estimates of the density of marine mammals and sea turtles in near-shore ocean waters;<br>
(2) small boat-based photo-identification surveys to document patterns of residency by individual dolphins; and<br>
(3) passive acoustic monitoring of the occurrence and distribution of bottlenose dolphins in the New River.<br>
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.

原始提供方：
杜克大学海洋实验室

数据集 credits：
杜克大学海洋实验室

摘要：
本项目是监测计划的第一阶段，旨在提供勒琼海军陆战队基地周边河口及沿海水域海洋哺乳动物季节性出现、分布及密度的定量信息。该工作包含三个部分：
(1) 海岸样线横断面调查，旨在估算近岸海域海洋哺乳动物和海龟的密度；
(2) 小型船只摄影识别调查，用于记录个体海豚的栖息模式；
(3) 新河中宽吻海豚出现及分布的被动声学监测；
2010年8月至2011年11月期间，我们在昂斯洛湾近岸沿海水域开展了11次船载调查。2010年10月至2011年11月期间，我们在新河开展了19天的宽吻海豚摄影调查。我们在内陆航道（Intracoastal Waterway）及新河共记录到54次目击，部分海豚群体最远出现在上游的摩根湾。