. The California gray whale : papers presented at the California Gray Whale Workshop, Scripps Institution of Oceanography, 21-22 August 1972. Gray whale; Gray whale -- Physiology; Gray whale -- Behavior. MFR PAPER 1056 A Note on Gray Whale Behavioral Interactions with Other Marine Mammals J. S. LEATHERWOOD With the exception of reports of killer whales, Orciniis urea, attacking gray whales. Esihricltuus \. (Scammon, 1874; Andrews. 1914; Gilmore. 1961; Burrage. 1964; More- John, 1968; and Baldridge. 1972) there are no accounts in the literature on the behavioral interactions between g
. The California gray whale : papers presented at the California Gray Whale Workshop, Scripps Institution of Oceanography, 21-22 August 1972. Gray whale; Gray whale -- Physiology; Gray whale -- Behavior. MFR PAPER 1056 A Note on Gray Whale Behavioral Interactions with Other Marine Mammals J. S. LEATHERWOOD With the exception of reports of killer whales, Orciniis urea, attacking gray whales. Esihricltuus \. (Scammon, 1874; Andrews. 1914; Gilmore. 1961; Burrage. 1964; More- John, 1968; and Baldridge. 1972) there are no accounts in the literature on the behavioral interactions between gray whales and other marine mam- mals. During aerial surveys of south- ern California cetaceans, (Leather- wood. 1974). I often observed gray whales in close association with other marine mammals (Figure I). Though the abundance of all these species in the area during the winter and spring makes coincidental association likely. the following incidents represent be- havioral interaction; Four days after her release, when she was first relocated by aircraft, the gray whale Gigi (Evans. 1974) was swimming with a small group of Pa- cific bottlenose dolphins Tiirsiops sp. in the surf zone just north of the San Clemente. Calif, pier. Though the dolphins left the whale shortly after the aircraft began to circle the area. when first seen they were closely clustered about the head of the gray whale as if riding its pressure wave. Since Gigi was housed during almost her entire internment at .Sea World with an Atlantic bottlenose dolphin. iursiops iniiu this association in the wild may have been a result of the captivity. However. I have ob- served gray whales swimming with bottlenose dolphins in the wild in six other instances, in three of which the porpoises were also riding the whales' pressure waves. Further, bottlenose dolphins arc common along the Baja California portion of the gray whales" migration route and in the breeding lagoons and have been reported mov- ing free
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