Jump to content


Photo

Current Theory on Gold Dorsal Spot on Top Minnows?


44 replies to this topic

#41 Chasmodes

Chasmodes
  • NANFA Member
  • Central Maryland

Posted 14 November 2017 - 01:36 PM

Maybe this sheds some light on the subject too (no pun intended):

 

Regarding Fundulus heteroclitus:  https://www.ncbi.nlm.../pubmed/7273103


Kevin Wilson


#42 Chasmodes

Chasmodes
  • NANFA Member
  • Central Maryland

Posted 21 November 2017 - 09:14 AM

Last night, the lights were out in my basement where my 20g high is and it was pitch black down there.  I switched on my basement light, not the tank light, and took a peek in the tank to check to see how the two razor clams were doing.  The day after I got them, one of them was in my blenny tank and was being picked on but was still alive, so I moved him to the 20g high thinking that the mummichogs would leave it alone.  Nope.  I found the biggest mummichog chowing down on it.  This was going on before I turned on the light, I'm sure of it.  I don't know if the blenny killed the clam or if the mummichog did.  Anyway, it's kind of a side bar, but it made me think of this thread, not so much of the dorsal spot/parietal eye, but more of how little light these fish need.  I never realized that they were that nocturnal.  And I wonder how much the parietal eye plays a part in that.


Kevin Wilson


#43 centrarchid

centrarchid
  • NANFA Member

Posted 21 November 2017 - 10:02 AM

You may be onto something regarding nocturnal nature although structures I am concerned with are NOT ALWAYS ASSOCIATED WITH THE PARIETAL EYE!


Find ways for people not already interested in natives to value them.

#44 gerald

gerald
  • Global Moderator
  • Wake Forest, North Carolina

Posted 21 November 2017 - 08:11 PM

Nostrils and taste buds work just fine in the dark.


Gerald Pottern
-----------------------
Hangin' on the Neuse
"Taxonomy is the diaper used to organize the mess of evolution into discrete packages" - M.Sandel


#45 centrarchid

centrarchid
  • NANFA Member

Posted 22 November 2017 - 04:09 AM

Two genera may have an out sized role as predators for these interesting fish.  The pickerel and black basses.  Both seem strongly into vision.  They might be seeing something in the dark we do not that is confusing them.


Find ways for people not already interested in natives to value them.



Reply to this topic



  


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users