SWFSC Marine Mammal Survey, PODS 1992, Cruise 1467

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

This 1992 line-transect survey was designed to make abundance estimates of the central stock of common dolphin, Delphinus delphis, in the eastern Pacific. This stock of dolphin is taken in the tropical tuna fishery and has suffered a substantial decline. Previous surveys covering larger areas have permitted estimates of abundance, but with low precision. This survey was conducted by the NOAA Southwest Fisheries Science Center aboard NOAA Ships David Starr Jordan and McArthur for a combined total of approximately 32,000 kilometers surveyed from late July to early November 1992. 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 McArthur.

The primary purpose of the cruise was to survey the area inhabited by the central 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.

This dataset is supplemental to the following datasets:
SWFSC Marine Mammal Survey, PODS 1992, Cruise 1468
SWFSC Marine Mammal Survey, PODS 1993, Cruise 1508
SWFSC Marine Mammal Survey, PODS 1993, Cruise 1509
SWFSC Marine Mammal Survey, Delphinus 2009, Cruise 1640

Overview

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 described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".

Attributes in dataset

Attribute (table column)	Description
dataset	definition not provided
lineno	Line No.
cruise	Cruise No.
date	Date
time	Time
sightno	Sighting No.
spcode	Species code
scientific	Scientific name
common	Common name
tsn	Taxonomic Serial Number added by OBIS-SEAMAP
latitude	Latitude in decimal degrees
longitude	Longitude in decimal degrees
school	definition not provided
excluded	definition not provided
geom	Geometry field added by OBIS-SEAMAP
oid	Unique ID number (generated by OBIS-SEAMAP)