Distribution and abundance of ondontocete species in Hawaiian waters : preliminary results of 1993-98 aerial surveys
Corporate Authors:Southwest Fisheries Science Center (U.S.)
Series:Administrative report LJ ; 00-14C
Description:"The abundance and distribution of marine mammals around the main Hawaiian Islands are not well understood. Most of the documented sightings have come from survey-based or incidental observations made primarily in inshore waters (e.g., Shallenberger 1981; Balcomb 1987; Leatherwood et al. 1988; Tomich 1986), from stranding data (Nitta 1991) or from monitoring of fisheries (Nitta and Henderson 1993). The aerial surveys reported here were performed during a five-year period from 1993-98 as part of the Acoustic Thermometry of Ocean Climate Marine Mammal Research Program (ATOC MMRP). The purpose of the surveys was to assess the distribution and abundance of all marine mammals within approximately 25 nautical miles (46 km) of the major Hawaiian Islands, in order to assess possible effects of the ATOC transmissions (Note: the ATOC source was operational only during the 1998 field season). During 1993, 1995 and 1998, surveys were performed throughout waters adjoining the eight major Hawaiian Islands. Though sightings of all marine mammal species were recorded, the primary focus was on the two endangered cetacean species, humpback whales (Megaptera novaeangliae) and sperm whales (Physeter macrocephalus) (ARPA 1995). This report covers distribution and abundance for the odontocete species seen only. Results for humpback whales will be summarized in a separate report, and the single sighting of a fin whale (Balaenoptera physalus) has previously been reported (Mobley et al. 1996)"--Introduction (page 1).
Supporting Files:No Additional Files
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