EAC 34, Marysville, January 1968
Page 47
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Transcription
1 3 January 1968 On leaving San Diego one single gray whale was noted migrating south. This whale being an early single was probably a pregnant female. Four separate schools of Delphinus delphis were noted during an 11- minute period in the early afternoon. School sizes were 35+/-5, 40+/-10, 50+/-10, and 65+/-10. Three of the four schools were noted to have some in- dividuals with whitish patches on their dorsal fins. In one school 75 percent of the dolphins had white patches in their dorsals. Only black dorsals were noted in one pod. Six single observations were made of California Sea Lions through the remainder of the day. 4 January 1968 Three Delphinus delphis were noted slowly moving to the southeast. All had whitish areas on the dorsal. A group of 12+/-2 Risso Dolphins (Grampus griseus) were noted travel- ing south. All-white dorsal surfaces and dorsal fins were noted for several of these dolphins. This coloration is normal for adults of this species. Also traveling south behind the Grampus were ca. 800+/-100 Right Whale Dolphins (Lissodelphis borealis) divided into 6-8 subgroups. The sub- groups traveled in a line one in back of the other, and each subgroup generally "porpoised" out of the water in unison. Lissodelphis commonly associates with other genera of cetaceans. A pod of 10+/-2 Dall Porpoise were traveling south staying near the surface between breaths. Three probably Dall Porpoise were noted some distance from the ship. A large school 30+/-5 Dall Porpoise were recorded traveling south. Two Dall Porpoise were noted diving and milling about the surface. These porpoises were probably feeding. Fifteen Fur Seals, all single except one pair, were recorded float- ing on their backs with flippers and tails in the air. 5 January 1968 One Fur Seal was recorded. 6 January 1968 Five pods of Dall Porpoise were noted this day. School size ranged from 6+/-2 to 12+/-2 with the other three being 10+/-2/5. A westerly direction was recorded for one pod.