SWFSC Marine Mammal Survey, Vaquita 1997, Cruise 1608
Marine Mammal and Turtle Division, Southwest Fisheries Science Center, NMFS, NOAA
Gerrodette, T. 2014. SWFSC Marine Mammal Survey, Vaquita 1997, Cruise 1608. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/1031) on yyyy-mm-dd.
Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography. 22(2):104-115.
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 David Starr Jordan 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.
The primary objective was to collect data to estimate the abundance vaquita, or Gulf of California harbor porpoise.
This dataset is supplemental to the following datasets:
SWFSC Marine Mammal Survey, Vaquita 2008, Cruise 1637
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.
Attributes described below represent those in the original dataset provided by the provider.
This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.
Attributes in dataset provided
|Rays and sharks||0|
|Latitude||22.84 - 31.52|
|Longitude||-116.57 - -109.87|
|Coord. prec.||2 decimal digits|
|Data type||Animal sighting|
|Effort||YES (ID: 1032)|
|Sharing policy||CC-BY-NC (Minimum)|
|Also availalbe from||iOBIS|
|See metadata in static HTML|
|See metadata in FGDC XML|
|See download history / statistics|