Re: Glossodoris pallida from Tofo, Mozambique

August 22, 2007
From: Natasja Vandeperre

Concerning message #20494:

Hello Bill,

I find it very hard to estimate the size of the nudi's underwater. I don't like mentioning them if there not very accurate. But I will try in the future. Next holiday I will take a ruler with me.
The sizes of the two specimens I sent you were more or less the same. I think about 2 cm. Maybe you can compare the sizes by comparing my pictures roughly. Except for H. sanguineus I used the maximum zoom and the minimum distance to get the nudi's sharp with my very simple compact camera. And the pictures I send to you are not cropped.
I hope this information can help you a little bit. For my personal feeling these two specimens were not the same species. But I'm afraid this female intuition approach isn't very scientific ;o)

Greetings,
Natasja

postmaster@naaktslakken.be

Vandeperre, N., 2007 (Aug 22) Re: Glossodoris pallida from Tofo, Mozambique. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20534

Thanks Natasja,

I agree its better to be silent than inaccurate. If you use usually use the same settings on your camera one way would be to photograph your ruler. In that way you would have a scale to measure the nudibranchs on your computer. As I said before I don't need accuracy to 2 decimal places - after all the animals change length as they crawl along, but it is useful to know if I am looking at a 10 mm or 100 mm animal.

And don't knock personal feelings - although you have to finally back them up with some real evidence, in my experience 'gut feelings' often lead to exciting discoveries.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Aug 22). Comment on Re: Glossodoris pallida from Tofo, Mozambique by Natasja Vandeperre. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20534

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