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  • Regular Member

Great! I actually picked up a bag, I was going to give it to my sis for her crabs if I couldn't use it. I think it'll make a big difference for my cories/ottos when it comes to finding food. Not that they have a problem now, but a lot slips down between the river rocks and they can't get it. So that means I get to 'redecorate' my tank tonight...YAY!

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I put it in and it looks good :)

I'll try and get a pic or two soon. It was VERY dusty though, I had to rince it for a good 10 minutes.

Any cases that show that sand irritates the gills of goldfish?

Do a scholar.google.com search of "sand gill irritation" and you'll get lots of hits :)

Edited by Chrissy_Bee
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Found some hits, nothing about goldfish having gill irritation from sand. And mine sure don't seem to be having any issues. I have never seen any posts to support it either. Any links to all this evidence? Anyone know any cases that show gill irritation caused by sand?

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Haha, I'm actually searching right now :P

For the first hour or so when I get in my brain isn't sufficiently 'warmed up' to do any real work. So far I haven't found anything too useful, but this article is pretty cool for anyone who wants to read it. It explains why goldies suck up big mouthfulls of gravel and spit it out, they actually have an organ that helps them sort the food from the substrate

http://www.springerlink.com/content/a411pj...73/fulltext.pdf

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Oh shoot, I should have realized...I think I'll start doing some searches like this and printing papers while I have access to them.

It's about the vagal taste system. Here's the abstract and link...and now time for me to do some actual work I suppose :P (the caffine has kicked in)

The sense of taste, although a relatively undistinguished

sensory modality in most mammals, is a highly

developed sense in many Wshes, e.g., catWsh, gadids, and

carps including goldWsh. In these species, the amount of

neural tissue devoted to this modality may approach 20% of

the entire brain mass, reXecting an enormous number of

taste buds scattered across the external surface of the animal

as well as within the oral cavity. The primary sensory

nuclei for taste form a longitudinal column of nuclei along

the dorsomedial surface of the medulla. Within this column

of gustatory nuclei, the sensory system is represented as a

Wne-grain somatotopic map, with external body parts being

represented rostrally within the column, and oropharyngeal

surfaces being represented caudally. GoldWsh have a specialization

of the oral cavity, the palatal organ, which

enables them to sort food particles from particulate substrate

material such as gravel. The palatal organ taste information

reaches the large, vagal lobe with a complex

laminar and columnar organization. This lobe also supports

a radially-organized reXex system which activates the musculature

of the palatal organ to eVect the sorting operation.

The stereotyped, laminated structure of this system in gold-

Wsh has facilitated studies of the circuitry and neurotransmitter

systems underlying the goldWsh?s ability to sort food

from stones.

Thomas E. Finger. J Comp Physiol A (2008) 194:135?143

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I always thought catfish had taste receptors on their barbels, but on national geographic last night was a show about the monster fish of the Amazon. They described a catfish (can't remember the name now, giant something, something being the native name) whose whole body is covered in taste receptors.

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  • 3 weeks later...
Guest fishscientist
I always thought catfish had taste receptors on their barbels, but on national geographic last night was a show about the monster fish of the Amazon. They described a catfish (can't remember the name now, giant something, something being the native name) whose whole body is covered in taste receptors.

Catfish do have taste buds all over their barbels as well as outside of their body. If you are interested in the article described by Chrissy Bee, I can send you the pdf since I wrote it.

email requests for the article to tom.finger@uchsc.edu

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