Sea Turtle Sightings Per Unit Effort (Spring), Northwest Atlantic United States, 1979-2007

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Abstract/Contents

Abstract
This data product was created as part of the Northwest Atlantic Marine Ecoregional Assessment. The Nature Conservancy developed this science-based ecoregional assessment for the Northwest Atlantic Marine region (Bay of Fundy to Cape Hatteras, North Carolina). This assessment synthesizes information on oceanography, chemistry, geology, biology, and social science to inform decisions about coastal and marine ecosystems. By integrating this information at a regional level, the Conservancy is able to provide both a greater understanding of the interrelated biological diversity of the marine ecoregion, and a clearer picture of the current condition of its natural areas and the challenges to their continued persistence. The ten categories of targets identified as the primary structure for the marine ecoregional assessment are: coastal and estuarine habitats, benthic habitats, diadromous fish, demersal fish, pelagic fish, forage fish, nearshore shellfish, shorebirds and seabirds, marine mammals, and sea turtles. For more information and a detailed report, please visit www.nature.ly/namera.Geospatial data obtained from the United States Navy included point shapefiles of valid sightings for all turtle targets and pre-calculated effort grids for each season. Sightings data were taken from NMFS-NEFSC Aerial Surveys, NMFS-NEFSC Shipboard Surveys, and the North Atlantic Right Whale Consortium Database. The validity of sightings was carefully screened and verified by United States Navy contractors before inclusion in the model. Invalid records were not included in the analysis. Sightings for each ten minute square were divided by the effort for each ten minute square to calculate Sightings Per Unit Effort (SPUE). SPUE was calculated for each target species, for each season, and for each ten minute square.
Purpose
Sightings Per Unit Effort (SPUE) was used to analyze areas of importance for the target sea turtle species in the Northwest Atlantic region.

Description

Type of resource cartographic, software, multimedia
Form Shapefile
Extent 0.485
Publisher Northeast Ocean Data
Publication date 2010
Language English
Digital origin born digital
Map data Scale not given. ; EPSG::4269 W 76°10ʹ--W 64°50ʹ/N 44°50ʹ--N 35°, Scale not given ; EPSG::4326

Creators/Contributors

Creator Nature Conservancy (U.S.)

Subjects

Subject Sea turtles
Subject Biogeography
Subject Albemarle Sound (N.C.)
Subject Baltimore Canyon
Subject Fundy, Bay of
Subject Chesapeake Bay (Md. and Va.)
Subject Delaware Bay (Del. and N.J.)
Subject Georges Bank
Subject Great South Channel (North Atlantic Ocean)
Subject Maine, Gulf of
Subject Ontario, Lake (N.Y. and Ont.)
Subject Long Island Sound (N.Y. and Conn.)
Subject Mid-Atlantic Bight
Subject Nantucket Shoals (Mass.)
Subject Norfolk Canyon
Subject Stellwagen Bank
Subject Northeastern States
Subject Middle Atlantic States
Subject 1979-2007
Subject Oceans
Subject Environment
Subject Biology and Ecology
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Use limitation Not to be used for navigation
WGS84 Cartographics This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location https://purl.stanford.edu/rq878xt1673

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

The Nature Conservancy. (2010). Sea Turtle Sightings Per Unit Effort (Spring), Northwest Atlantic United States, 1979-2007. Northeast Ocean Data. Available at: http://purl.stanford.edu/rq878xt1673.

Collection

Northeast Ocean Data : Maps and data for ocean planning in the northeastern United States

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