Large Body Size Allows Sei Whales to Store Energy for Long Migrations

Blubber is more than insulation, it is a biological fuel tank for sei whales.

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Blubber can also provide buoyancy and protection in addition to serving as an energy reserve.

Sei whales accumulate thick layers of blubber during feeding seasons, storing energy that supports migration and reproduction when prey availability declines.

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These energy reserves are critical during winter months when whales move to warmer waters where plankton densities are lower.

The ability to convert seasonal feeding success into stored energy illustrates the finely tuned balance between physiology and ocean productivity.

Source

National Marine Mammal Laboratory

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