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Unlike bony fish, sharks do not have gas-filled swim bladders for buoyancy. Instead, sharks rely on a large liver filled with oil that contains squalene, and their cartilage, which is about half the normal density of bone. [33] Their liver constitutes up to 30% of their total body mass. [39]
However, human activity has disrupted this soundscape, largely drowning out sounds organisms depend on for mating, warding off predators, and travel. Ship and boat propellers and engines, industrial fishing, coastal construction, oil drilling, seismic surveys, warfare, sea-bed mining and sonar-based navigation have all introduced noise ...
Sharks typically targeted for their liver oil include the school and gulper shark, and the basking shark (pictured). [1] All three of these species are either endangered [2] [3] or critically endangered [4] due to overfishing according to the IUCN, although a legal targeted fishery for basking sharks no longer exists.
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Find out more in the… Historian of marine science Samantha Muka, of Stevens Institute of Technology, doesn’t dismiss the fear that a great white shark can inspire. But Muka offers a reminder ...
The entire body of a shark is a very efficient eating machine. Each organ has been fine-tuned for hunting and acquiring food.
The cost-of-living crisis is part of the cost-of-oil crisis, fuel is unaffordable to millions of cold, hungry families. They can’t even afford to heat a tin of soup. Meanwhile, crops are failing and people are dying in supercharged monsoons, massive wildfires and endless droughts caused by climate breakdown.
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