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

Duke University Marine Laboratory

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:

(1) coastal line transect surveys, designed to provide estimates of the density of marine mammals and sea turtles in near-shore ocean waters;

(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.

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.

N/A

5-13-2013: One off-effort sighting did not have group-size estimated, so 1 was used to be conservative and noted in the [notes] column.

Additional survey data for the DUML Camp Lejeune monitoring program 2010-2011 are available on OBIS-SEAMAP in the "DUML coastal 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)
recnum	Record number
obs_date	Date of observation
sightno	Sight number
starttime	Start time
obs_time	Time of observation
project	Project name
surveyarea	Survey area
latitude	Latitude of observation
longitude	Longitude of observation
bss	Beaufort sea state
depth	Bottom depth in meters
temp	Temperature (degrees Celsius)
obs_count	Number of animals observed
notes	Note of when the number of animals was not available, so 1 was used to be conservative
sp_obs	Species observed
sp_tsn	ITIS Taxonomic Serial Number added by OBIS-SEAMAP
geom	definition not provided