T. karelini pelagic larvae

[joseph]

For the lack of a better word. These are from Jenns stock. Some of the larvae spend most of the time on the bottom...others float in midwater. The latter also have very long arms/fingers.

 

[pamela]

Nice babies Joseph! Love those arms!

 

[dot]

Actually, I would have to say that there is a better word, as "pelagic" refers to relating to, or living in open oceans or seas rather than waters adjacent to land or inland waters. The term more fitting would be "limnetic zone," which refers to the near-surface open water in a freshwater biome.

 

[hayden]

Im raising about 9 Larvae from some Adults that were CB by Jen. They all seem to be sitting on the bottom all the time. I don't seem to have any in the "limnetic zone"... Cool observation Joseph.

 

[joseph]

Thanks for the better term Dot

I'm starting to wonder if it really is two kinds of larvae(starting to doubt this a bit). I haven't been able to take a photo of any of the ones on the bottom showing the front legs-but I suspect they also have enlongated fingers.

Hayden: I think I have around 7 or so here myself. Looks like All of our larvae are on about the same page.

One of the largest appears to be developing back legs. More photos to come.

 

[joseph]

MikeG: I wasn't suggesting two different species but rather if the larvae were finely divided between those which floated midwater and those which spent most of the time on the bottom(as in-can larvae change between floating and sinking?). I was under the impression at first that only some of the larvae developed the lengthened fingers and floating ability.

From the way this(url) is worded they seem to suggest that all the larvae develop into floaters but I remember seeing a few which acted like they could not float midwater.
http://icldr.hgu.mrc.ac.uk/Abstracts/hinchliffe.html

(Message edited by fishkeeper on May 21, 2005)

 

[joseph]

Larvae have grown some. I have managed to confirm that the ones that are on the bottom do indeed have the lengthened fingers of the ones that are floating.

Long digits on this one too

May not be novel, but to me it is certainly interesting.

(Message edited by fishkeeper on May 22, 2005)