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Report of ecosystem studies conducted during the 1988 eastern tropical Pacific dolphin survey on the research vessel David Starr Jordan.
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1989
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[PDF-6.55 MB]
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Description:The National Marine Fisheries Service (NMFS) has the responsibility of assessing the status of dolphin stocks affected by the tuna purse-seine fishery in the eastern tropical Pacific (ETP) . In 1988, the Southwest Fisheries Center (SWFC) conducted the third survey of a six-year program to monitor population trends in ETP dolphin stocks (Sexton and Holt, 1989). Two NOAA vessels were used, the David Starr Jordan (hereafter referred to as the Jordan) and the McArthur. The vessels operated concurrently in the ETP from July 28 through December 6, 1988. Approximately the same area and time period are surveyed during each year of the program. As part of this monitoring program the SWFC is also studying the physical and biological environment inhabited by the dolphins. This ecosystem approach will facilitate the interpretation of dolphin population trends detected by these surveys, and will provide information necessary for understanding the biological basis of ETP dolphin distribution and abundance. The physical oceanographic research of the program is being
carried out jointly with NOAA's Atlantic Oceanographic and Meteorological Laboratory (AOML) , as part of their contribution to the long-term Eastern Pacific Ocean Climate Study (EPOCS) and
Tropical Ocean Global Atmosphere (TOGA) programs. This report describes the types of data collected and sampling techniques used, and summarizes data collected (including disposition of the data) for the environmental studies conducted
aboard the Jordan. Results from the McArthur are available in a separate data report (Lierheimer et al., 1989).
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Rights Information:Public Domain
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