12/10/2023 0 Comments Ne yo one in a million chipmunkHowever, data from guppies, nematodes, and computational models show that increased extrinsic mortality can sometimes lead to longer evolved lifespans. Indeed, animals with extreme longevity (e.g., Greenland shark, bowhead whale, giant tortoise, vestimentiferan tubeworms) typically experience minimal predation. Most experimental and comparative field studies conform to this prediction. The classical mutation accumulation, antagonistic pleiotropy, and disposable soma theories predict that increased extrinsic mortality should select for the evolution of shorter lifespans and vice versa. The evolutionary theories of aging seek to explain why such stark longevity differences exist and why a deleterious process like aging evolved. While the ocean quahog can survive for half a millennium, the mayfly survives for less than 48 h. Radical lifespan disparities exist in the animal kingdom.
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