Re: Aplysia dactylomela and its egg-mass

July 10, 2008
From: Vinicius Padula


Concerning message #21693:

Dear Bill and Fabio,

I´m sending pictures of a Brazilian specimen of Aplysia dactylomela laying eggs. The eggs are pink/red, not purple. However, you can see in my other message [#21696 ] the variation of egg mass color of Aplysia fasciata.
I´m pretty sure that I have seen a purple Aplysia eggmass here, but I can´t find the picture.

Locality: Conchas Beach, intertidal, Rio de Janeiro, Brazil, Western Atlantic. Photographer: Vinicius Padula.

As Bill commented, the color change depends on the time of the development. However, it is interesting to check the these variations and also the size of the capsules, eggs, larvae etc.... I believe this can be very informative in these "species" with a wide geographic distribution.

Regards,
Vinicius

viniciuspadula@yahoo.com

Padula, V., 2008 (Jul 10) Re: Aplysia dactylomela and its egg-mass. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21695

Thanks Vinicius,

It's funny how often it is the common things we never seem to record. When I think of how many Aplysia egg masses I have seen in the field and in aquaria, I have very few notes on the topic. I don't recall seeing pink/red or purple coloured eggs associated with A. dactylomela in the Pacific so it is certainly something we should take note of in the future.

As you say, size of eggs and type of development could give us valuable clues into whether these apparently circumglobal species are really one species or not. I am not so sure how much help colour will be but I guess until we get better information on the topic we will never know.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Jul 10). Comment on Re: Aplysia dactylomela and its egg-mass by Vinicius Padula. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21695

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