Behaviour of Triopha catalinae

January 22, 2002
From: Ryan Murphy

Dear Bill,
This is Ryan again, a year or so after my first message. I ended up writing a paper on shade preference in five species of subtidal dorids, but not Triopha catalinae .

My report is at:

I studied Archidoris montereyensis, Anisodoris nobilis, Diaulula sandiegenesis , Cadlina luteomarginata and Acanthodoris hudsoni.
Thanks again for your help.

Murphy, R., 2002 (Jan 22) Behaviour of Triopha catalinae. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Ryan,
Thanks for getting back to me. It's always nice to get some feedback. I hope your exams went well. I've had a look at your report and it certainly raises some interesting questions on whether these animals prefer shade. I guess the other point it raises is just how difficult it is to design experiments to study specific aspects of an animal's behaviour. As you have found, and thoughtfully considered, it is very difficult to isolate one particular item in an animal's behavioural repertoire and at the same time isolate one of the multiplicity of environmental factors which may have some effect on that behaviour.

Good Luck with your future studies.
Bill Rudman

Rudman, W.B., 2002 (Jan 22). Comment on Behaviour of Triopha catalinae by Ryan Murphy. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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