Instant attraction

日期:2019-03-07 02:09:07 作者:柏弁逄 阅读:

SIZE might not matter so much when it comes to fertilising eggs under water, say biologists in Australia. Fertilisation can be a hit-or-miss affair for marine animals that release eggs and sperm into the water, and bigger eggs are thought to make bigger targets for sperm to hit. But now it seems that the chemicals some eggs produce to attract sperm are just as important. Jon Havenhand at Flinders University in Adelaide and his colleagues tracked sperm as it fertilised sea-squirt eggs. The eggs released a sperm-attracting chemical into the water,