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Reports of carcinomas in sharks exist, and current data does not support any conclusions about the incidence of tumors in sharks. [72] Great white sharks do not mistake human divers for seals or other pinnipeds. When attacking pinnipeds, the shark surfaces quickly and attacks violently. In contrast, attacks on humans are slower and less violent ...
"Shark is very high in mercury, which is a neurotoxin. It should be avoided completely by pregnant women and children. Further, the population of sharks is also declining," said Wright.
Sharks have keen olfactory senses, located in the short duct (which is not fused, unlike bony fish) between the anterior and posterior nasal openings, with some species able to detect as little as one part per million of blood in seawater. [21] Sharks have the ability to determine the direction of a given scent based on the timing of scent ...
Too much bleeding would attract sharks, so the oil kept the blood from seeping into the water. “If I am ever to write up the rule of swimming across the Florida Strait, I will definitely state ...
The Navy employed Shark Chaser extensively between 1943 and 1973. It is believed [8] that the composition does repel sharks in some situations, but not in all, with about a 70% effectiveness rating. [citation needed] On the other hand, Albert Tester questioned the idea that dead shark bodies or chemicals based on them could work as shark repellent.
By measuring blood chemistry samples when the shark is immobile, it has been suggested that tonic immobility can actually put stress on the shark, and reduce breathing efficiency. Others think sharks have a series of compensatory mechanisms that work to increase respiration rates and lower stress.
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