At the beginning of the wet season (usually October / November), most adult Red Crabs suddenly begin a spectacular migration from the forest to the coast, to breed and release eggs into the sea. Breeding is usually synchronized island wide. The rains provide moist overcast conditions for crabs to make their long and difficult journey to the sea. The timing of the migration breeding sequence is also linked to the phases of the moon, so that eggs may be released by the female Red Crabs into the sea precisely at the turn of the high tide during the last quarter of the moon. It is thought that this occurs at this time because there is the least difference between high and low tides. The sea level at the base of the cliffs and on the beaches, where the females release their eggs, at this time varies the least for a longer period, and it is therefore safer for the females approaching the water's edge to release their eggs. Sometimes there are earlier and later migrations of smaller numbers of crabs but all migrations retain this same lunar rhythm.
posted by Mr. Wong @ 2:27 PM
2 Comments:
christmas island was suppoed to be singapore's!! darn. it must be quite gross to hear the cracking sound while the wheels crush the poor crabbies. =( but there's plenty of them.... so i guess its fine.... haha. n it would be great if they were edible. u wont run out of food. haha. tho i think the locals would prob be damn sick of it..
how do u play golf with so many crabs on the golf course?!?!?
baby crabs look abit scary.
the cat is sooo cute!
i just got back from two whole days of skiing! soooo fun! now my entire body is aching :) so fun cause alot of exchange students went.. did you know ppl in brazil speak english! ooh. i'm gonna switch to mini skis! long ones just keep crossing and skiing on one leg kills my muscles!! so melb? i really serious!
Post a Comment
Subscribe to Post Comments [Atom]
<< Home