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SWFSC Marine Mammal Survey, PODS 1993, Cruise 1509

Dataset homepage

Citation

Gerrodette, T. 2004. SWFSC Marine Mammal Survey, PODS 1993, Cruise 1509. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/215) on yyyy-mm-dd. https://doi.org/10.15468/y4d59q accessed via GBIF.org on 2025-05-14.

Description

Original provider: NOAA Southwest Fisheries Science Center (SWFSC) Dataset credits: NOAA Southwest Fisheries Science Center (SWFSC) Abstract: This 1993 line-transect survey was designed to make abundance estimates of the northern stock of common dolphin, Delphinus delphis, in the eastern Pacific. This stock of dolphin is taken in the tropical tuna fishery. The index of relative abundance for this stock, computed from sightings on tuna vessels, has declined substantially in the last decade. However, because tuna vessels cover only the southern portion of the stock's range, the declines in the index may be due to a northward shift in distribution, rather than an actual decline in abundance. The 1993 survey was designed to produce the first range-wide estimates of abundance for the northern common dolphin and its recently described congener, Delphinus capensis. This survey was conducted by the NOAA Southwest Fisheries Science Center aboard NOAA Ships McArthur and David Starr Jordan for a combined total of approximately 32,000 kilometers surveyed from late July to early November 1993. This dataset provides the time-date and geographical coordinates, by species/stock, of all cetaceans detected during the survey, as well as the daily and intra-daily start and end points of the line-transect survey by the NOAA Ship David Starr Jordan. Purpose: The primary objective of the cruise was to survey the area inhabited by the northern stock of common dolphins, and to make an estimate of its absolute abundance in order to assess the impact of the dolphins killed by the United States and international yellowfin tuna purse seine fleet in the eastern tropical Pacific. Supplemental information: [2021-04-12] Updated with additional attributes. SWFSC MMTD Cruise Number: 1509 Perpendicular distance will be released upon permission by the contributor. Please contact the contributor if needed. Attribute descriptions for effort data: dist: Length of the segment (km) Mode: Effort mode type (C = closing mode; P = passing mode)

Purpose

The primary objective of the cruise was to survey the area inhabited by the northern stock of common dolphins, and to make an estimate of its absolute abundance in order to assess the impact of the dolphins killed by the United States and international yellowfin tuna purse seine fleet in the eastern tropical Pacific.

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. Stenella longirostris orientalis
    rank: subspecies
  2. Stenella coeruleoalba
    common name: Striped Dolphin rank: species
  3. Steno bredanensis
    common name: Rough-toothed Dolphin rank: species
  4. Delphinus capensis
    common name: Long-beaked Common Dolphin rank: species
  5. Delphinus delphis
    common name: Short-beaked Common Dolphin rank: species
  6. Tursiops truncatus
    common name: Common Bottlenose Dolphin rank: species
  7. Stenella attenuata
    common name: Pantropical Spotted Dolphin rank: species
  8. Grampus griseus
    common name: Risso's Dolphin rank: species
  9. Lagenorhynchus obliquidens
    common name: Pacific White-sided Dolphin rank: species
  10. Stenella longirostris
    common name: Spinner Dolphin rank: species
  11. Feresa attenuata
    common name: Pygmy Killer Whale rank: species
  12. Pseudorca crassidens
    common name: False Killer Whale rank: species
  13. Globicephala macrorhynchus
    common name: Short-finned Pilot Whale rank: species
  14. Orcinus orca
    common name: Killer Whale rank: species
  15. Phocoena sinus
    common name: Gulf of California harbor porpoise rank: species
  16. Physeter macrocephalus
    common name: Sperm Whale rank: species
  17. Kogia breviceps
    common name: Pygmy Sperm Whale rank: species
  18. Kogia sima
    common name: Dwarf Sperm Whale rank: species
  19. Hyperoodontidae
    rank: family
  20. Delphinus
    common name: common dolphins rank: genus
  21. Mesoplodon
    common name: beaked whales rank: genus
  22. Stenella attenuata graffmani
    common name: coastal spotted dolphin rank: subspecies
  23. Ziphius cavirostris
    common name: Cuvier's Beaked Whale rank: species
  24. Balaenoptera
    common name: baleen whales rank: genus
  25. Balaenoptera acutorostrata
    common name: Minke Whale rank: species
  26. Balaenoptera edeni
    common name: Eden's whale rank: species
  27. Balaenoptera physalus
    common name: Fin Whale rank: species
  28. Balaenoptera musculus
    common name: Blue Whale rank: species
  29. Megaptera novaeangliae
    common name: Humpback Whale rank: species
  30. Cetacea
    common name: cetaceans rank: order
  31. Cetacea
    common name: cetaceans rank: order
  32. Cetacea
    common name: cetaceans rank: order
  33. Kogia
    common name: pygmy sperm whales rank: genus
  34. Stenella attenuata
    common name: Pantropical Spotted Dolphin rank: species
  35. Cetacea
    common name: cetaceans rank: order
  36. Cetacea
    common name: cetaceans rank: order
  37. Balaenoptera
    common name: baleen whales rank: genus
  38. Caretta caretta
    common name: Loggerhead Sea Turtle rank: species
  39. Dermochelys coriacea
    common name: Leatherback Sea Turtle rank: species
  40. Lepidochelys olivacea
    common name: Olive Ridley rank: species
  41. Mirounga angustirostris
    common name: Northern Elephant Seal rank: species
  42. Caniformia
    common name: pinnipeds rank: suborder
  43. Phocidae
    common name: earless seals rank: family
  44. Cheloniidae
    common name: Sea Turtles rank: family
  45. Zalophus californianus
    common name: California Sea Lion rank: species

Geographic Coverages

Pacific,California Current,California,Mexico,Gulf of California

Bibliographic Citations

Contacts

Jeffrey Moore
originator
position: Primary contact
Southwest Fisheries Science Center, NOAA
email: jeff.e.moore@noaa.gov
homepage: https://www.fisheries.noaa.gov/west-coast/science-data/california-current-marine-mammal-assessment-program
OBIS-SEAMAP
metadata author
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: https://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: https://seamap.env.duke.edu
Jeffrey Moore
owner
position: Primary contact
Southwest Fisheries Science Center, NOAA
email: jeff.e.moore@noaa.gov
homepage: https://www.fisheries.noaa.gov/west-coast/science-data/california-current-marine-mammal-assessment-program
Jeffrey Moore
administrative point of contact
position: Primary contact
Southwest Fisheries Science Center, NOAA
email: jeff.e.moore@noaa.gov
homepage: https://www.fisheries.noaa.gov/west-coast/science-data/california-current-marine-mammal-assessment-program
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