N. Hugenberg, DVM; G. Patton, BS; H. Anderson, DVM; A. Rawson, MD; E. Lerner, VMD; J. Gorzelany, MS
Dolphin medicine is many years behind human medicine in the database and understanding of pathologies and normal physiological parameters. Most marine mammal stranding programs in the southeast U.S. are unable to conclusively determine "cause of death" and, instead, are limited to describing "mortality factors" until a better understanding can be gained.
Stranding response has been provided by Mote Marine Laboratory (MML) between Tampa Bay and Charlotte Harbor (FL) since 1984. The files contain 105 cases for the period December 1984 through February 1991, ranging from live animals to skeletal remains. All are Tursiops truncatus with the exception of one Stenella sp. Eleven special cases are presented ranging from behavior-induced mortality factors, to an interesting variety of natural conditions, and human-related factors:
Lobomycosis
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Broken jaw
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Net entanglement
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Torsion
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Stingray barbs
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Severe raking
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Lymphangiomyoma
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Fish stuck in throat
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Fatal knife wound
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Parasites
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Icterus
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Of the 105 cases involving dolphins, 30% had no reported pathologies or the soft tissues were too decomposed to examine. Of the remaining 73 cases, the order of frequency of occurrence of reported pathologies was:
34% parasites
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8% ulcers or abscesses
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29% respiratory
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7% severe raking
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23% shark foraging
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5% stingray barbs
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15% net entanglement
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5% circulatory problems
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12% liver/kidney dysfunction
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4% reproductive problems
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8% emaciation
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It is only through continued efforts to thoroughly examine stranded animals and report the findings to the veterinary and scientific communities that will we close the gap in our ability to understand and properly care for these special animals.