Stress may trigger male crucian carp defense against predators

Only males among the fish species crucian carp have developed a strategy to protect themselves from hungry predators, according to a new study from Lund University in Sweden published in the journal Evolution. The explanation could lie in that the surrounding environment affects the stress system in males and females differently.

from Phys.org - latest science and technology news stories https://ift.tt/70jAvcB

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