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

Duke University Marine Laboratory

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.

N/A

Additional survey data for the DUML Camp Lejeune monitoring program 2010-2011 are available on OBIS-SEAMAP in the DUML New River surveys on the occurrence, distribution and density of marine mammals in Camp Lejeune 2010-2011 dataset.

The dataset has been updated over time as outlined below. Each entry includes the version number, release date, type of change, and a short description.

Overview

Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.

Attributes in dataset

Attribute (table column)	Description
oid	Original ID (created by OBIS-SEAMAP)
obs_date	Date of observation
sighting_no	Sighting No.
cuetime	Cue time
cuelat	Cue latitude
cuelon	Cue longitude
obs_time	Time of the observation (local time zone)
latitude	Latitude in decimal degrees
longitude	Longitude in decimal degrees
bottom_depth	Bottom depth im meters
temperature	Temperature in Celsius
sp_obs	Species observed
sp_tsn	ITIS Taxonomic Serial Number added by OBIS-SEAMAP
obs_count	Number of animals observed
calves	Number of calves
effort_status	Effort status (ON or OFF)
obs	Observer ID
geom	Geometry field added by OBIS-SEAMAP