. Bulletin. Science; Natural history; Natural history. NEW MORPHOTYPES OF TETRAPHYLLID CESTODES 109. Fig. 6. Phyttohothrium delphini in blubber of Detphiiuis delphis. krill-eating baleen whales, which accidentally ingest an occasional fish, are only rarely infected with P. delphini. It appears possible that sharks become infected with P. delphini by eating the flesh of marine mammals, since these larvae are such common parasites of the blubber (Fig. 6). Southwell and Walker (1936) note that "cysticerci found in seals are capable of retaining their viability for at least 11 days after deat
. Bulletin. Science; Natural history; Natural history. NEW MORPHOTYPES OF TETRAPHYLLID CESTODES 109. Fig. 6. Phyttohothrium delphini in blubber of Detphiiuis delphis. krill-eating baleen whales, which accidentally ingest an occasional fish, are only rarely infected with P. delphini. It appears possible that sharks become infected with P. delphini by eating the flesh of marine mammals, since these larvae are such common parasites of the blubber (Fig. 6). Southwell and Walker (1936) note that "cysticerci found in seals are capable of retaining their viability for at least 11 days after death of the ;" During the present study, larvae in the blubber were viable after being stored at 4°C for one month. Shark attacks on cetaceans have been previously reported (Wood et al., 1970). Ridgway and Dailey (1972) show evidence of an attack on a common dolphin (Delphiniis delphis) by a mako shark (Isiirus , according to tooth pattern) that occurred along the southern California coast. The Greenland shark, Somniosus microcephulus, is known to bite off the flesh of living whales (Johnston, 1937, according to Williams, 1968). Additional work is underway using experimental infections and //; vitro cultiva- tion to answer the remaining questions on the transmission, distribution and speciation of F. delphini. Acknowledgments We express sincere appreciation to Mr. William Walker, former Curator of Marincland of the Pacific, for collecting the majority of the samples examined during this study, and to Dr. John Allen, formerly of the Navel Undersea Center, Hawaii, Dr. John Best, Ocean Research Institute. Durbin, South Africa, Dr. Daniel K. Odell, University of Miami. School of Marine and Atmospheric Sci- ences, and Dr. Robert L. Brownell, Fish and Wildlife Service, for donating additional material. Additional thanks are extended to Mr. Robert Hartung and. Please note that these images are extracted from scanned page images that may have been digital
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