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Technical Documentation, State of the Ecosystem Report

26 Cetacean Distribution Shifts

Description: The data presented here are the locations of the center of core habitat for cetaceans by season as documented in 2010 versus 2017.

Found in: State of the Ecosystem - Gulf of Maine & Georges Bank (2024), State of the Ecosystem - Mid-Atlantic (2024)

Indicator category: Published methods.

Contributor(s): Sam Chavez, Elizabeth Josephson, Debra Palka

Data steward: Debra Palka

Point of contact: Debra Palka

Public availability statement: Source data are publicly available.

26.1 Methods

26.1.1 Data sources

Data collected during NMFS aerial and shipboard line transect abundance surveys (Palka et al. 2021). Processed data are available at https://github.com/NEFSC/READ-PSB-AMAPPS-public

26.1.2 Data analysis

Centroid of spatial density distribution map from each season and species in 2010 was then compared to the corresponding season and species in 2017 (Chavez-Rosales et al. 2022).

26.1.3 Data processing

Line transect data were processed using standard 2-team Distance sampling analysis methods, then used in generalized additive models to describe the spatiotemporal habitat-density relationships (Chavez-Rosales et al. 2022).

The Cetacean distribution shifts indicator was formatted for inclusion in the ecodata R package using the R script found here.

catalog link https://noaa-edab.github.io/catalog/HMS_species_distribution.html