SWFSC Marine Mammal Survey, Delphinus 2009, Cruise 1640
NOAA Southwest Fisheries Science Center (SWFSC)

Dataset credit

Marine Mammal and Turtle Division, Southwest Fisheries Science Center, NMFS, NOAA


Primary contact Susan Chivers NOAA Southwest Fisheries Science Center
Secondary contact Tim Gerrodette NOAA Southwest Fisheries Science Center
Data entry Ei Fujioka Duke University



The 2009 "Ecosystem Survey of Delphinus Species" research survey focused on the two species of common dolphin, Delphinus delphis and D. capensis, found off southern California, USA, and Baja California, Mexico. The primary objective was to provide information to improve conservation and management plans for these species. The project used a multidisciplinary approach. For both Delphinus species, data were collected to estimate abundance, pregnancy and birth rates, timing of reproduction, gene flow, and contaminant concentrations. Oceanographic data were collected to characterize habitat, and data on distribution and abundance of seabirds, prey fishes, and squids were collected to further characterize the ecosystem in which these dolphins live. Photographs of dolphin schools were taken from a NOAA Twin Otter aircraft while the survey was being conducted. The aerial photographs will provide count and measurement data to calibrate observer estimates of school size and to estimate timing of reproduction and birth rates. This research will facilitate understanding population demography of these species in an ecosystem framework. Essential information about the primary focal species, D. capensis, will greatly increase our knowledge about this coastal species and the geographic extent of a Mexico-U.S. transboundary stock. For additional information about the Delphinus cruise, please see http://swfsc.noaa.gov/prd-delphinus.aspx.


The primary objectives of the 2009 Delphinus ecosystem cruise were (1) to characterize the distribution, habitat and reproductive characteristics of long- and short-beaked common dolphins, and (2) to improve non-lethal sampling techniques for studying reproduction in wild, free-ranging cetaceans.

Supplemental information

This dataset is supplemental to the following datasets:
SWFSC Marine Mammal Survey, PODS 1992, Cruise 1467
SWFSC Marine Mammal Survey, PODS 1992, Cruise 1468
SWFSC Marine Mammal Survey, PODS 1993, Cruise 1508
SWFSC Marine Mammal Survey, PODS 1993, Cruise 1509




Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downlodable online. Other attributes may be obtained upon provider's permission unless otherwise noted below.

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

Attribute (table column)Description
oidUnique ID number (generated by OBIS-SEAMAP)
cruiseCruise No
obs_dateDate of the sighting
obs_timeTime of the sighting (local time zone)
sighting_noSighting No.
species_orgSpecies code in original format
sp_obsSpecies code recorded
sp_tsnTaxonomic Serial Number added by OBIS-SEAMAP
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
obs_countGroup size
geomGeometry field added by OBIS-SEAMAP
Marine mammals1,155
Sea turtles53
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2009-09-07
Date, End2009-12-05
Temporal prec.111111
Latitude21.86 - 37.60
Longitude-122.73 - -109.73
Coord. prec.2 decimal digits
Data typeAnimal sighting
EffortYES (ID: 1070)
Traveled (km)9,533
Effort hours670
Sharing policy CC-BY-NC (Minimum)
Also availalbe from iOBIS
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