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Dinner slime

发布时间:2019-03-08 05:08:04来源:未知点击:

MARINE snails reap a hidden benefit from following each other’s trails, biologists in Britain have found. Mark Davies and Peter Beckwith of the University of Sunderland examined the slime trails that help periwinkles, Littorina littorea, to slide about on rocks. They found that, like a spider’s web catching flies, the slime was very effective at trapping algae floating in the water. Other snails grazed more heavily on these trails than on other surfaces (Marine Ecology Progress Series, vol 179, p 247). Mucus is expensive to produce in terms of energy, but using it to catch food could offset some of this cost,