Glossodoris rubroannulata - more pics spawning?

August 31, 2007
From: David Mullins


Dear Bill,

Hopefully to shed more light on the egg ribbon of this species I have forwarded a series of photos taken at a different time [see message #20602 ].

Locality: Old Woman Island, Maroochydore, 12 metres, Queensland, Australia, Pacific Ocean, 3 September 2005, rocky reef. Length: 80 mm. Photographer: David Mullins.

In the upper image the specimen is observed to be injured on the left hand side. In the past I have noticed that often when nudibranchs are stressed, one of the first things some do is lay eggs. In the other image I have swapped to the other side and there is a short trail of eggs appearing from its right side and on looking carefully they disappear under the mantle but they are not below the foot, so I deduce the ribbon is emanating from the genital pore. I believe it seems to be quite similar to the egg ribbon in the previous message.

I would not usually release these images publicly because I am not entirely happy with the quality. However as a "gentleman scientist" (a la Sir Joseph Banks) I am only too willing to help.

KInd regards,
David Mullins.

david@nudibranch.com.au

Mullins, D.A., 2007 (Aug 31) Glossodoris rubroannulata - more pics spawning?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20606

Dear David,
Thanks again. I know photographers only like to show their best photos, but I can't see anything wrong with these photos as photos and they are a valuable additon to our knowledge of this species. Long live the tradition of the gentleman [and gentlewoman] scientist!

I think two observations of G. rubroannulata with this type of egg-ribbon is a pretty good indication that these are the type of eggs it lays. 

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Aug 31). Comment on Glossodoris rubroannulata - more pics spawning? by David Mullins. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20606

Factsheet

Glossodoris rubroannulata

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