Winter/Spring Habitat-based Density Models for Three Cetacean Species off Southern California

Description

We used a well-established Generalized Additive Modeling framework to develop cetacean SDMs based on 20 California Cooperative Oceanic Fisheries Investigations (CalCOFI) shipboard surveys conducted during winter and spring between 2005 and 2015. Models were fit for short-beaked common dolphin (Delphinus delphis delphis), Dall’s porpoise (Phocoenoides dalli), and humpback whale (Megaptera novaeangliae). Model performance was evaluated based on a variety of established metrics, including the percentage of explained deviance, ratios of observed to predicted density, and visual inspection of predicted and observed distributions. Final models were used to produce spatial grids of average species density and spatially-explicit measures of uncertainty. Results provide the first fine scale (10 km) density predictions for these species during the cool seasons and reveal distribution patterns that are markedly different from summer/fall, thus providing novel insights into species ecology and quantitative data for the seasonal assessment of potential anthropogenic impacts.

Resources

Name Format Description Link
57 Data access URL https://cetsound.noaa.gov/packages/swfsc_CalCOFI_WinterSpring_Becker_et_al_2017.zip
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/56126
0 Online Resource https://cetsound.noaa.gov
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/ost/dmp/pdf/56126.pdf
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords

Tags

  • office of science & technology
  • distribution
  • noaa
  • dall's porpoise
  • phocoenoides dalli
  • density
  • u.s. department of commerce
  • national marine fisheries service
  • noaa cetaceans and sound project (cetsound)
  • delphinus delphis delphis
  • california
  • cetacean
  • eastern pacific ocean
  • megaptera novaeangliae
  • doc/noaa/nmfs/ost
  • southern california bight
  • short-beaked common dolphin
  • humpback whale

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