Female fish can favor sperm from preferred males despite external fertilization
Wednesday, August 17, 2016 - 09:01
in Biology & Nature
Biologists studying a small, colorful fish in the Mediterranean Sea have discovered a new way in which a female can choose the best father for her offspring. During spawning of the ocellated wrasse, ovarian fluid released with eggs favors sperm from the nest-tending males preferred by the females, limiting fertilization by 'sneaker' males.