Ca. Styan, INEXPENSIVE AND PORTABLE SAMPLER FOR COLLECTING EGGS OF FREE-SPAWNINGMARINE-INVERTEBRATES UNDERWATER, Marine ecology. Progress series, 150(1-3), 1997, pp. 293-296
A simple device is described that can be used to collect the eggs of f
ree-spawning marine invertebrates and that is cheap, portable and fool
-proof. The air-displacement sampler was used to collect eggs from fem
ale sea urchins, Heliocidaris erythrogramma, downstream from experimen
tally induced spawning males. Average fertilisation rates of eggs decr
eased downstream and were 87, 48, 40, 17 and 7% at 10, 100, 200, 400 a
nd 1000 cm respectively.