Dr.Roy?

[crafty_50mitchell]

Hello sir,

I am just wondering if you are still as active on this board as you were when I was a few months ago. If you are I would like to ask you a question:
What is the greatest distance for stomatopod vision? And by that I mean at what point (and Im sure it is different per species) can a stomatopod pick up movement? I am well aware that the visual system is most advanced but I am unsure if that pertains to the spectrum viewable or the overall function of the visual system (from what I know here is what I think of when I think of the visual system: color tempetures, color spectrum, distance, binochular(sp?) or trinochular(again sp?) and a host of other integration/processing variables) vision. Also I am curious if the visual system is developed early in the stomatopods life, granted it's been awhile since Ive taken my developmental psych class but I am wondering how development compares to a human infant. Anyway Dr.Roy, or any other curious reader, are still reading this I appreciatte your patience and imput.
Cheers,
Brian

 

[Gonodactylus]

I'm still hanging in there. There have been no tests that I know of with respect to distance vision in stomatopods. The acuity of the stomatopod eye is similar to many decapod crustacean, so we are not comparing something akin to eagles to humans. There is no question that the eye has sufficient resolution to pick out conspecifics at several body lengths (a P. ciliata can see another individual at at least 4 meters), but the range-finding apparatus probably degrades quickly with distance and probably does not function well beyond a few body lengths - more than enough to control the accuracy of the strike.

Larvae have a simple crustacean eye with only one visual pigment until the molt to a postlarvae. Then the eye is completely reorganized to the adult form.

Hope this helps.

Roy

 

[crafty_50mitchell]

Yeah it does, thanks Dr.Roy.

Brian