Why Do Orcas Dorsal Fins Collapse In The Wild
Camila Farah
They also mention that the collapsed dorsal fins in wild orcas are usually from aggressive behavior in males that results in injured dorsal fins.
Seaworld explains why it stopped breeding orcas orca health in captivity. Two male orcas were found with collapsed dorsal fins after they were exposed to the exxon valdez oil spill. The whale called killer commented that age was a factor in the wavy dorsal fins. Causing most of the deformities mentioned above.
The whales also often swim in a repetitive circular pattern. It is seen in less than one percent of wild animals and the rare wild orca with a collapsed fin very likely acquired it from humans he said. Dorsal fin collapse in orcas in the wild is typically associated with emaciation the state of being abnormally thin or weak and or anthropogenic human causes such as entanglement in fishing gear bullet wounds or exposure to oil spills baird and gorgone 2005. Most commonly male orcas develop collapsed dorsal fins most likely as a result of not being able to mimic their natural swimming patterns while in captivity.
Orcas or also known as killer whales have a dorsal fin on their back that is held in a vertical position by collagen. In short dorsal fin collapse is a pathological condition caused by captivity. Eric hoyt the author of orca. There have been many theories as to why fins collapse in wild killer whales including injury age stress dehydration and poor health.
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Waters there are several males with hooked dorsal fins where the top is curled over and several fins with significant abnormalities but only yuculta is known to have a fully flopped fin. The dorsal fin is held up by collagen which hardens during adolescence. When they do occur they are the result of serious injury or environmental contamination.
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