Datasets > Polygon data > Atlantic Ocean > 1950-1999

Marine Mammals Sightings Per Unit Effort, 1979-2007

Northeast Ocean Data · 1979 Full Details

Full Details

Title
Marine Mammals Sightings Per Unit Effort, 1979-2007
Description
Geospatial data obtained from the United States Navy included point shapefiles of valid sightings for all marine mammal 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., Sightings Per Unit Effort (SPUE) was used to analyze areas of importance for the target marine mammal species in the Northwest Atlantic Marine Ecoregion: Where in the ecoregion has the species been consistently found over time? (persistence) Where in the ecoregion is the species consistently found in high abundances? (persistence weighted by abundance), Not to be used for navigation, This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Creator
Nature Conservancy (U.S.)
Publisher
Northeast Ocean Data
Subject
Marine mammals, Marine habitats, Biogeography, Oceans, Environment, Biology and Ecology
Temporal Coverage
1979-2007
Date Issued
2010
Rights
This item is in the public domain. There are no restrictions on use.
Rights Holder
This work is in the Public Domain, meaning that it is not subject to copyright.
Access Rights
Public
Format
Shapefile
Language
English
Date Added
October 01, 2025

Location

Cite and Reference

  • Citation
    Nature Conservancy (U.S.) (2010). Marine Mammals Sightings Per Unit Effort, 1979-2007. Northeast Ocean Data. (dataset)
  • BTAA Geoportal Link

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