Larval development of Navanax

March 19, 2002
From: I.M. Loeza & A.M. Ortiz

We are studens of marine science in Ensenada, Baja California, Mexico. We found a specimen of Navanax inermis and it laid eggs. At this time we already have the free living velliger larvae, but we still need some information about how to care for them. It would be great if you could help us any way you can.

We'll wait for your answer.
Ivan Mendez Loeza and Alfonso Medellin Ortiz.

Facultad de Ciencias Marinas.
Universidad Autonoma de Baja California. Mexico.
Carretera Ensenada - Tijuana km. 103.
e_iml@hotmail.com

amedellin_79@hotmail.com

Loeza, I.M. & Ortiz, A.M., 2002 (Mar 19) Larval development of Navanax. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6454

Dear Ivan and Alfonso,
There are some references to aspects of the natural history of Navanax inermis on the attached Fact Sheet but I am not sure if anyone describes looking after the larvae. I suspect this species has planktotrophic larvae which means trouble!

It's not impossible, but it means setting up a system which includes breeding up sterile cultures of particular species of phytoplankton for the veliger larvae to eat. The other thing that needs to be dealt with is the tendency for the larvae to get caught in the surface film. Perhaps someone can give us some ideas, or direct us to a site where methods for keeping larvae alive are discussed.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Mar 19). Comment on Larval development of Navanax by I.M. Loeza & A.M. Ortiz. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6454

Factsheet

Navanax inermis

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