https://doi.org/10.82144/c6484bb8 https://seamap.env.duke.edu/dataset/1031 https://www.gbif.org/dataset/a0df8396-be50-41da-bf78-b82fc9d3ff6b https://obis.org/dataset/0cae33c0-a38d-4a64-ba78-52f6d2d42ea0 Jeffrey Moore Southwest Fisheries Science Center, NOAA Primary contact jeff.e.moore@noaa.gov https://www.fisheries.noaa.gov/west-coast/science-data/california-current-marine-mammal-assessment-program Dave Weller NOAA Southwest Fisheries Science Center Secondary contact dave.weller@noaa.gov OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu distributor Jeffrey Moore Southwest Fisheries Science Center, NOAA Primary contact jeff.e.moore@noaa.gov https://www.fisheries.noaa.gov/west-coast/science-data/california-current-marine-mammal-assessment-program owner Dave Weller NOAA Southwest Fisheries Science Center Secondary contact dave.weller@noaa.gov originator 2025-07-31 eng Original provider: NOAA Southwest Fisheries Science Center (SWFSC) Dataset credits: Marine Mammal and Turtle Division, Southwest Fisheries Science Center, NMFS, NOAA Abstract: The 1998 Vaquita Abudance Survey was a collaboration between the National Marine Fisheries Service and SEMARNAP’s Instituto Nacional de la Pesca (INP) of Mexico. This line-transect survey was designed to collect data to estimate the abundance of vaquita, or Gulf of California harbor porpoise. The study area was from the northern end of the Gulf of California south to about 30 degrees north latitude in waters less than 100 meters deep. This survey was conducted by the NOAA Southwest Fisheries Science Center aboard the NOAA ship <i>David Starr Jordan</i> for a total of 1,560 kilometers surveyed from mid-August to mid-September 1997. 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. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml Marine Biology Visual sighting Vessels Sightings Vaquita Population Abundance Survey Census N/A This dataset is supplemental to the following datasets: SWFSC Marine Mammal Survey, Vaquita 2008, Cruise 1637 To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction. https://seamap.env.duke.edu/dataset/1031 Oceans,Gulf of California,Mexico -116.57 -109.87 31.52 22.84 1997-08-05 1997-09-18 Scientific names are based on the Integrated Taxonomic Information System (ITIS). species Arctocephalus townsendi Guadalupe fur seal genus Balaenoptera Baleen whales species Balaenoptera edeni Eden's whale species Balaenoptera physalus Fin whale species Berardius bairdii Baird's beaked whale suborder Caniformia Pinnipeds order Cetacea Cetaceans family Cheloniidae Sea turtles genus Delphinus Common dolphins species Delphinus capensis Long-beaked common dolphin species Delphinus delphis Short-beaked common dolphin species Globicephala macrorhynchus Short-finned pilot whale species Kogia sima Dwarf sperm whale species Lagenorhynchus obliquidens Pacific white-sided dolphin species Megaptera novaeangliae Humpback whale genus Mesoplodon Beaked whales species Mirounga angustirostris Northern elephant seal species Orcinus orca Killer whale family Otariidae Eared seals species Phocoena sinus Gulf of california harbor porpoise species Physeter macrocephalus Sperm whale species Stenella coeruleoalba Striped dolphin species Tursiops truncatus Common bottlenose dolphin species Zalophus californianus California sea lion The primary objective was to collect data to estimate the abundance vaquita, or Gulf of California harbor porpoise. notPlanned Jeffrey Moore Southwest Fisheries Science Center, NOAA Primary contact jeff.e.moore@noaa.gov https://www.fisheries.noaa.gov/west-coast/science-data/california-current-marine-mammal-assessment-program NA NA NA Jeffrey Moore owner Dave Weller originator NA zd_1031 2025-07-31T16:29:42-04:00 dataset Moore, J. and D. Weller. 2021. SWFSC Marine Mammal Survey, Vaquita 1997, Cruise 1608. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/c6484bb8. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/1031 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1031/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1031/eml OBIS-SEAMAP zd_1031 zd_1031 Jaramillo-Legorreta, A. M., L. Rojas-Bracho, and T. Gerrodette. 1999. A new abundance estimate for vaquitas: First step for recovery. Marine Mammal Science: 15(4):957-973.