Anyone ever heard of a banded sculpin with green eyes?
banded sculpin question
Started by
Guest_bbrown_*
, Apr 13 2010 09:59 PM
10 replies to this topic
#2
Guest_daveneely_*
Guest_daveneely_*
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Posted 14 April 2010 - 06:01 AM
The green reflection is an adjustable filter, functioning like sunglasses for the fish, that reduces the amount and wavelength of light reaching the retina under bright conditions. This filter is present in most sculpins, but is most apparent if you observe them in shallow streams in very clear water.
Fore more info check out Gnyubkina, V.P. and A.V. Levin. 1987. Changeable corneal coloration in some Baikalian and river sculpins (Pisces: Cotoidei). Copeia 1987(3):758-762. There's more work currently being done on this attribute in our North Americsn sculpins...
Fore more info check out Gnyubkina, V.P. and A.V. Levin. 1987. Changeable corneal coloration in some Baikalian and river sculpins (Pisces: Cotoidei). Copeia 1987(3):758-762. There's more work currently being done on this attribute in our North Americsn sculpins...
#3
Guest_CATfishTONY_*
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Posted 14 April 2010 - 03:52 PM
i must say thanks for the info.The green reflection is an adjustable filter, functioning like sunglasses for the fish, that reduces the amount and wavelength of light reaching the retina under bright conditions. This filter is present in most sculpins, but is most apparent if you observe them in shallow streams in very clear water.
Fore more info check out Gnyubkina, V.P. and A.V. Levin. 1987. Changeable corneal coloration in some Baikalian and river sculpins (Pisces: Cotoidei). Copeia 1987(3):758-762. There's more work currently being done on this attribute in our North Americsn sculpins...
it is ? and answers of this nature that keeps me around here.
#4
Guest_bbrown_*
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Posted 14 April 2010 - 09:21 PM
Thanks for the info. Yes, it was very clear and brightly lit shallow water. I'll post a video clip of it soon.
#5
Guest_IsaacSzabo_*
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Posted 15 April 2010 - 02:23 PM
That's really interesting Dave. I had noticed the green/gold reflection on banded sculpins eyes in the past and wondered what purpose it might serve. I wonder what advantage filtering the light might give them. Would it allow them to spot prey or predators easier?
#6
PBK
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- NANFA Guest
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Posted 07 January 2020 - 02:57 AM
In addition to Dave’s info the green reflection trait is present in fish that do their feeding in the dark. It’s a light amplifying ....er thing...called the tapetum lucidum located in the eye ball that will help your sculpin find & eat all your darters in your tank during the night. I’m not sure if catfish have this trait since they rely more on taste and smell thru their whiskers and skin to find their food in the dark.
#7
Matt DeLaVega
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- Forum Staff
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Posted 07 January 2020 - 06:41 AM
Is this the same thing we see in cats and other critters? Walleye?
The member formerly known as Skipjack
#8
PBK
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Posted 07 January 2020 - 11:56 AM
Hello Matt. I think so...but you probably know more about this than me.
#9
Dave Neely
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Posted 07 January 2020 - 12:00 PM
Why did this get bumped after 10 years?!
It's a completely different thing. The green reflection mentioned in the original post is a corneal filter, on the outer side of the eye, that modifies the spectral profile and reduces the amount of light reaching the retina. The tapetum lucidum in walleye, sauger, Hiodon, lots of marine teleosts, chondrichthyans, many mammals, etc. is the reflective layer on the back side of the eye -- behind the retina -- that reflects light back onto the retina for better low-light vision.
#10
gerald
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- Wake Forest, North Carolina
Posted 07 January 2020 - 03:21 PM
PBK is a new forum member; looks like he\she is just browsing through forum posts new and old. Thanks for explaining the difference in location and function Dave. We had some discussion awhile back about the green reflective cornea in distinguishing Carolina darter from swamp darter too.
Gerald Pottern
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Hangin' on the Neuse
"Taxonomy is the diaper used to organize the mess of evolution into discrete packages" - M.Sandel
#11
PBK
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Posted 09 March 2020 - 03:49 PM
I conceed to Dave Neely’s better knowledge of the sculpin green eye structure. No slight intended.
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