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"We thought that freshwater insects might be shifting so much of their energy toward osmoregulation in saltier environments that they cannot grow or thrive," Buchwalter says.

That way the animal doesn't have to work as hard to maintain osmoregulation.

I grabbed a yellow legal pad where Fred had recorded pages of notes on great white shark behavior, reproduction, and something called osmoregulation.

Freshwater fish tend to have higher concentrations of cesium than their oceanic counterparts because of differences in their osmoregulation systems, which controls fluids entering and leave the body.

The Z. marina genome resource will markedly advance a wide range of functional ecological studies from adaptation of marine ecosystems under climate warming5, 6, to unravelling the mechanisms of osmoregulation under high salinities that may further inform our understanding of the evolution of salt tolerance in crop plants7.