Re: Parasites and Navanax inermis

September 25, 2007
From: Ernie Hartt

Concerning message #20446:

I definitely agree that the "flared" Navanax in the top photo looks "off," but I can't pin down what the problem is. The copepods, however, I can make a definitive comment on. I found them on the gills of nearly all of the specimens that I collected from San Diego Bay, but only on a few specimens from Mission Bay, and have never seen any on Navanax from exposed rocky intertidal area. I also only ever had deaths from "natural causes" in the specimens from San Diego Bay, but the first one didn't happen until about halfway through my research, so I didn't look into it; fewer than 20 died from natural causes over the course of my research. It might be an interesting research topic, though. I'm not sure if the copepods are truly commensals, or if they were opportunistic parasites that possible contributed to the deaths.

Locality: San Diego, 0-2 meters, California, USA, Pacific Ocean, 1989/1990, Intertidal Bays, rocky shores. Length: Various

Ernie Hartt

Lumikko@snail-mail.net

Hartt, E. W, 2007 (Sep 25) Re: Parasites and Navanax inermis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20790

Thanks Ernie,

Bill Rudman

Factsheet

Navanax inermis

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