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DUML vessel-based photo-id and biopsy surveys in Onslow Bay CHPT OPAREA 2011-2012
Contact: Swaim, Zach
Availability: This dataset is licensed under a Creative Commons Attribution 4.0 International License.
The United States (US) Navy proposed constructing an Undersea Warfare Training Range (USWTR) along the US Atlantic coast. One of the proposed sites within the Cherry Point (CHPT) OPAREA is an area of 1,713 km2 in Onslow Bay, 87 km from the coast of North Carolina. As part of the Navy's Atlantic Fleet Training and Testing (AFTT) Monitoring Program, shipboard and aerial line transect surveys were implemented in 2007 to estimate density and document distribution and seasonal residency of marine mammals and sea turtles in the proposed USWTR (see "DUML vessel-based line transect surveys for proposed Onslow Bay USWTR site 2007-2010" dataset). Shipboard line-transect survey methods transitioned to biopsy and photo-identification sampling at the end of April 2011 to address questions of residency and population structure in the CHPT OPAREA. Survey effort was expended along the 200 m depth contour and occasionally around eddies and fronts generated by the Gulf Stream. more
We are focusing on residency and population structure with our shipboard surveys because we are: (1) obtaining adequate data with which to estimate density from aerial line transect sampling; (2) interested in addressing questions of residency as photo-identification data from Onslow suggest considerable residency in that area despite minimal sampling. Sightings within this dataset are from shipboard photo-ID and biopsy surveys conducted from 2011-2013. The primary objectives of these surveys are to: (1) document species occurrence and examine patterns of residency of marine mammals and turtles in the defined study area, (2) determine relatedness among individuals, populations and species within the study area, and (3) supplement the visual surveys with acoustic monitoring using a High-frequency Acoustic Recording Package (HARP). [2014-03-21] The 2013 data were appended. [2013-03-19] Additional survey data for the Onslow Bay USWTR site are available on OBIS-SEAMAP in the "DUML vessel-based line transect surveys for proposed Onslow Bay USWTR site 2007-2010" dataset.
OBIS-SEAMAP: Spatial Ecological Analysis of Megavertebrate Populations, more
Dataset status: In Progress
Data type: Data
Metadatarecord created: 2013-06-26
Information last updated: 2014-06-05