DeLong, T. C.. The University of Southern Mississippi, tdelong@sunfish.ssc.usm.edu
Mullin, K. C.. National Marine Fisheries Service, NOAA, kmullin@triton.pas.nmfs.gov
Redalje, D. G.. The University of Southern Mississippi, dredalje@sunfish.ssc.usm.edu

 
DISTRIBUTION AND ABUNDANCE OF CETACEANS IN THE NORTHEASTERN GULF OF MEXICO, RELATIVE TO SHIPBOARD SURFACE STRUCTURE DATA AND AVHRR IMAGERY
 
The National Marine Fisheries Service (NMFS) Southeast Fisheries Science Center conducted the first summer Marine Mammal Survey of the Eastern Gulf of Mexico on August 16 - September 9, 1994. Data were collected aboard the R/V Oregon II utilizing line transect methods in order to examine the diversity, distribution and abundance of marine mammals in the Gulf of Mexico. A sawtooth cruise track between the 20 m contour and 8 km past the 2000 m contour, covering a total of 2884 transect km, was surveyed. Temperature and salinity data were also collected from a continuous flow thermosalinograph and CTD and XBT stations, located every 24 and 12 km, respectively, and at the end of the survey day. Observations produced sightings of 299 herds composed of 4370 total individual animals. At least 13 species were identified. Sighting data were analyzed using the DISTANCE Sampling program to estimate the density and size of animal clusters (herds), and the density and number of animals in the surveyed area. These results were then compared to the shipboard surface structure data and AVHRR imagery.
 
Day: Thursday, Feb. 4
Time: 11:15 - 11:30am
Location: Hilton of Santa Fe
 
Code: SS04TH1115H