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Colorful fish reveal how species stay distinct despite interbreeding

المصدر: Phys.org - latest science and technology news stories · نُشر

Colorful fish reveal how species stay distinct despite interbreeding
المصدر: Phys.org - latest science and technology news stories

Vividly colored fish dwelling at the bottom of shallow Midwestern streams may help biologists understand the evolutionary mechanisms by which species remain distinct despite their similarities and overlapping ranges. Orangethroat and rainbow darters regularly interbreed where the

Vividly colored fish dwelling at the bottom of shallow Midwestern streams may help biologists understand the evolutionary mechanisms by which species remain distinct despite their similarities and overlapping ranges. Orangethroat and rainbow darters regularly interbreed where their ranges overlap, yet—millions of years after they first diverged—they remain separate species.

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Fish prove every pregnancy is a battle: Unexpected evidence for the food fight between mothers and babies
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Fish prove every pregnancy is a battle: Unexpected evidence for the food fight between mothers and babies

Left to their own devices, babies in the womb would suck their mothers dry. A developing baby benefits from taking as many essential nutrients as possible, but evolutionary theory predicts that to survive pregnancy, mothers need to keep some of these nutrients for themselves.

Phys.org - latest science and technology news stories ·