Elysia crispata from Colombia
October 1, 2003
From: Ana Karina Yepes
Hello,
I have been working a little with Elysia crispata and I would like to know if there is an specific methodology to extract the symbionts they contain. We are trying to examine the stomach to find little pieces of algae, or perhaps the zooxanthellae, but in two occasions we have failed and found nothing, and the content doesn´t even take the lugol, to find polysaccharids.
I add a photograph of the slug collected in Isla Fuerte, Colombia. It is a detail of the parapodia… from which I have one question. Is this coloration due to the pigments they extract from the algae? If this one has an orange color, one could expect to find carothenes in it? And, where is the tissue that contains the chloroplasts?
Thanks
Ana Karina Yepes Gómez
Lab. de Productos Naturales bioactivos marinos
Instituto de Biologia
Universidad de Antioquia
Medellin, Colombia
akyg01@matematicas.udea.edu.co
Yepes, A. K., 2003 (Oct 1) Elysia crispata from Colombia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/11030Dear Ana Karina,
Firstly Elysia contains chloroplasts not zooxanthellae. The green specks in your photo are indeed clumps of living chloroplasts and so they retain their green pigments. The yellow and other colours in these animals seem to be unrelated to photosynthesis and are produced by the animal. If you look through the other messages and the Fact Sheet you will find addresses of people who are currently working on the chloroplast symbiosis and are probably the best people to contact for advice. You will also find quite a few references on the Forum on this topic
Best wishes
Bill Rudman
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