Skip to main content

IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ] Print this page

SWFSC Marine Mammal Survey, PODS 1993, Cruise 1509
Citation
Mangels, Karl F., and Tim Gerrodette. 1994. Report on cetacean sightings during a marine mammal survey in the Eastern Tropical Pacific Ocean aboard the NOAA ships McArthur and David Starr Jordan, July 28-November 6, 1993. NOAA-TM-NMFS-SWFSC-211. https://marineinfo.org/id/dataset/3367

Access data
Archived data

Also accessible through:
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Description
Data of line-transect survey designed to make abundance estimates of the northern stock of common dolphin, Delphinus delphis, in the eastern Pacific (1993). more

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. 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.

Scope
Themes:
Biology > Mammals, Biology > Reptiles
Keywords:
Marine/Coastal, I, Pacific, Cetacea, Pinnipedia, Testudines

Geographical coverage
I, Pacific [Marine Regions]

Temporal coverage
29 July 1993 - 5 November 1993

Taxonomic coverage
Cetacea [WoRMS]
Pinnipedia [WoRMS]
Testudines [WoRMS]

Contributors
National Oceanic and Atmospheric Administration; Fisheries Service; Southwest Fisheries Science Center (SWFSC), moredata owner

Related datasets
Published in:
OBIS-SEAMAP: Spatial Ecological Analysis of Megavertebrate Populations, more

Publication
Based on this dataset
Mangels, K.F.; Gerrodette, T. (1994). Report on cetacean sightings during a marine mammal survey in the Eastern Tropical Pacific Ocean and the Gulf of California aboard the NOAA ships McArthur and David Starr Jordan, July 28-November 6, 1993. NOAA Technical Memorandum, 211. National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southwest Fisheries Center: California. iv, 10 + tables + figures + appendices pp., more

Dataset status: Completed
Data type: Data
Data origin: Research
Metadatarecord created: 2012-11-14
Information last updated: 2015-04-13
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy