Dolabella auricularia in the Philippines
December 5, 2002
From: Jonathan P. Ubaldo
Dear Dr. Rudman,
I am an undergraduate student of the University of the Philippines in the Visayas, Cebu College. I'd like to know what is the best time of the year to collect sea hares, particularly Dolabella auricularia which I will be using for my thesis study. I have an inkling that it is best to collect them during summer when water is warm as what I have read from observations in Australia. But then our waters here in the Philippines, being tropical, stay generally warm throughout the year, so I think I could find them all year round.
What do you think?
Thanks,
Jonathan P. Ubaldo
atanix@eudoramail.com
Dear Jonathon,
Good Luck with your studies. If you look at the Dolabella Reference List there is a publication on the ecology of this species from the Philippines which should give you some background information. From my experience, and of course many published studies by other workers over many years, tropical waters are not dull places with the same thing happening every day. There are indeed cyclical changes, probably triggered by climatic events, such as monsoons, wet seasons, lunar cycles etc, just as spectacular as the seasonal cycles in temperate waters. The classic synchronised coral spawning on the Great Barrier Reef is a perfect example. So I suspect your Sea Hares may not be equally common all year round.
Best wishes,
Bill Rudman
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