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CalCOFI marine mammal surveys 2004-2008 - off effort

Dataset homepage

Citation

Douglas, A. 2012. CalCOFI marine mammal surveys 2004-2008 - off effort. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/794) on yyyy-mm-dd. https://doi.org/10.15468/kucz3f accessed via GBIF.org on 2023-09-27.

Description

Original provider: Annie Douglas, Cascadia Research Collective Dataset credits: Annie Douglas, Cascadia Research Abstract: From July 2004 to April 2008 dedicated visual observers following consistent line-transect methods (Buckland et al., 1993; Kinzey et al., 2003) observed from the CalCOFI platforms on quarterly cruises. Observers used handheld 7X50 reticle Fujinon binoculars to sight, identify, and make school size estimates of cetaceans and pinnipeds encountered along the transect lines between CalCOFI water sampling stations. The southern water sampling stations are set along six, parallel lines running southwest to northeast, with lines increasing in length from north to south (470 – 700 km) and stations occurring every 37 km in coastal and continental shelf waters and every 74 km offshore. Three research vessels were used for the sixteen surveys, Scripps Institution of Oceanography Roger Revelle (2 surveys) and New Horizon (8 surveys) and, NOAA David Starr Jordan (6 surveys), vessel height varied from 8.1-13.2m and survey speed varied from 10 to 12 knots. Purpose: The waters off southern California are remarkably diverse and species rich, but they are also an area of swift commercial development, navy training activity, population growth and climate change. Continued visual marine mammal and seabird surveys working in concert with oceanographic ecosystem investigations are essential for monitoring the health and changes of the California current system. Supplemental information: Effort tracklines may overlap with data published in the CalCOFI and NMFS Seabird and Marine Mammal Observation Data, 1987-2006 dataset. However, data collected for this dataset used different methods and observers. Please contact the primary contact listed for more details.

Purpose

The waters off southern California are remarkably diverse and species rich, but they are also an area of swift commercial development, navy training activity, population growth and climate change. Continued visual marine mammal and seabird surveys working in concert with oceanographic ecosystem investigations are essential for monitoring the health and changes of the California current system.

Sampling Description

Study Extent

NA

Sampling

NA

Method steps

  1. NA

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

Scientific names are based on the Integrated Taxonomic Information System (ITIS).
  1. Balaenoptera acutorostrata
    common name: Minke Whale rank: species
  2. Balaenoptera borealis
    common name: Sei Whale rank: species
  3. Balaenoptera
    common name: baleen whales rank: genus
  4. Balaenoptera musculus
    common name: Blue Whale rank: species
  5. Balaenoptera physalus
    common name: Fin Whale rank: species
  6. Delphinus capensis
    common name: Long-beaked Common Dolphin rank: species
  7. Delphinus delphis
    common name: Short-beaked Common Dolphin rank: species
  8. Delphinus
    common name: common dolphins rank: genus
  9. Eschrichtius robustus
    common name: Gray Whale rank: species
  10. Grampus griseus
    common name: Risso's Dolphin rank: species
  11. Globicephala macrorhynchus
    common name: Short-finned Pilot Whale rank: species
  12. Lissodelphis borealis
    common name: Northern Right Whale Dolphin rank: species
  13. Lagenorhynchus obliquidens
    common name: Pacific White-sided Dolphin rank: species
  14. Megaptera novaeangliae
    common name: Humpback Whale rank: species
  15. Phocoenoides dalli
    common name: Dall's Porpoise rank: species
  16. Physeter macrocephalus
    common name: Sperm Whale rank: species
  17. Steno bredanensis
    common name: Rough-toothed Dolphin rank: species
  18. Tursiops truncatus
    common name: Common Bottlenose Dolphin rank: species
  19. Delphinidae
    common name: dolphins rank: family
  20. Cetacea
    common name: cetaceans rank: order
  21. Cetacea
    common name: cetaceans rank: order
  22. Ziphius cavirostris
    common name: Cuvier's Beaked Whale rank: species

Geographic Coverages

Southern California

Bibliographic Citations

Contacts

Annie Douglas
originator
position: Primary contact
Cascadia Research Collective
email: ABDouglas@cascadiaresearch.org
homepage: http://www.cascadiaresearch.org
OBIS-SEAMAP
metadata author
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: http://seamap.env.duke.edu
OBIS-SEAMAP
distributor
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: http://seamap.env.duke.edu
Annie Douglas
owner
position: Primary contact
Cascadia Research Collective
email: ABDouglas@cascadiaresearch.org
homepage: http://www.cascadiaresearch.org
Annie Douglas
administrative point of contact
position: Primary contact
Cascadia Research Collective
email: ABDouglas@cascadiaresearch.org
homepage: http://www.cascadiaresearch.org
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