Strange Phenomenon of discoloration with L-75

PauloSR · Post by **PauloSR** » 20 Aug 2004, 22:30

Dear Friends,
I already see some strange phenomenon, but this surprised me for completeâ?¦
I know that there are some species of Loricariidae that although to be born with the perfect colors, they become albinos, butâ?¦ I never knew that phenomenon occur with L-75 Ancistomus sp. as it is registered in these photos:

1

2

3

4

5

6

7
I am sorry for the low quality of some photos. But I only realize of its weak quality when I connect my camera to the computerâ?¦
I liked to call to the attention for the following one:
1Âª and 2Âª photos, in this fish we can see that the characteristic black spots become disappearing of the L-75;
In 3Âª and 4Âª photos the black spots are in frank disappearance;
In 5Âª photo there are only a small vestige of the characteristic color of the L-75 in the tail;
In the last two photos the color disappeared totallyâ?¦
Some one knows what append?????
Sincerely,
Paulo

(Sorry for my bad english)

Wood · Post by **Wood** » 20 Aug 2004, 23:47

If you look at your pictures backward,last one first. You then have the normal way a Para Pleco develops. They normally start out orange,and as they grow develop the spots. I find this pretty funny.

PauloSR · Post by **PauloSR** » 21 Aug 2004, 00:36

But mine had black spots and now lost them... This is the problem...
[]s
Paulo

Wood · Post by **Wood** » 21 Aug 2004, 01:33

What are their sizes. I believe they are small and youg and immature. They will get thier spots back as they grow!!

PauloSR · Post by **PauloSR** » 21 Aug 2004, 01:59

But the problem is that they already had the normal pattern/color and lost thenâ?¦
They have around of 9-10cm
[]s
Paulo

ronsterrc · Post by **ronsterrc** » 21 Aug 2004, 14:18

I know what the problem might be!!! It might be stress related as the pictures are taken OUT OF THE WATER. How would you like it if i took you under water and photographed you. I MEAN HOW CRUEL IS THAT? AND I'M GONNA REPORT YOU TO THE R.S.P.C.FISH

Ronnie

PauloSR · Post by **PauloSR** » 21 Aug 2004, 16:32

ronsterrc wrote:I know what the problem might be!!! It might be stress related as the pictures are taken OUT OF THE WATER. How would you like it if i took you under water and photographed you. I MEAN HOW CRUEL IS THAT? AND I'M GONNA REPORT YOU TO THE R.S.P.C.FISH

Sincerely your answer donâ??t deserve any commentâ?¦

I put a question, and I wait for a scientific answer, donâ??t an infantile oneâ?¦

Paulo

Jeff B. · Post by **Jeff B.** » 21 Aug 2004, 17:33

hmmmm ronsterrc...i really don't know what are you doing on PC...

... did you browse thru Cat-eLog?!?!?
you will have to report a bunch of ppl...

Post by **Shane** » 21 Aug 2004, 18:03

Paulo,
Your fish is just demonstrating normal fright coloration. Many loricariids are capable of radical color changes. This would be a great experiment. Place various plecos over different color surfaces and snap a photo after one hour over each surface. I believe the results would be pretty amazing.

Ronster,
There is no problem with gently removing a fish from the water to photograph it. Loricariids, especially, can survive long periods exposed to atmospheric air. Just make sure that your hands are wet prior to handling the fish so as not to damage the slime coat and make sure that you have a gentle but good grip so the animal is not dropped.
-Shane

PauloSR · Post by **PauloSR** » 21 Aug 2004, 22:43

Well...
To see if I become to understand...
The problem is this:
- The photos are of 4 different fishes;
- When we receive the fishes, all they had this aspect:

- At some time, some of them had started to change of aspect;
- The fish of the two first photos (1 and 2) represents the aspect that they have when they start to lose the spots (it is to notice in these two photos that the spots start to vanish);
- Photos 3 and 4 are of another fish already in a more advanced state of loss of spots;
- In photo 5, one can see that this fish already only presents vestiges of spots in the tail;
- In the last two photos (6 and 7) are of another fish, with the final aspect that the fish are after some days of transformation;
- We have at this moment some fish with the aspect of this I finish.
I wait to have been enlightening...
Sincerely,
Paulo

(Sorry for my bad english

)

Wood · Post by **Wood** » 21 Aug 2004, 23:58

All your questions have been answered. I just do not think you unerstand. Good luck!

PauloSR · Post by **PauloSR** » 22 Aug 2004, 00:23

I think thatâ??s you that donâ??t understandâ?¦ That kind of answers donâ??t satisfy meâ?¦ My scientific exigency needs moreâ?¦
I work with this kind of fishes for some years and it is the first time this appendâ?¦

Post by **Shane** » 22 Aug 2004, 00:30

Paulo,
Look under Chaetostoma pearsei in the Cat-eLog and you will see what I am talking about. Notice the same sp. over white and then over gravel.
-Shane

PauloSR · Post by **PauloSR** » 22 Aug 2004, 01:20

OKâ?¦
But in the same tank, with the same conditions, there are individuals with normal color, and others with the changing colorâ?¦

I will try to put a photo of all individuals hereâ?¦

Yann · Post by **Yann** » 22 Aug 2004, 15:58

Hi!

I understand what Paulo mean: this is in fact 3 different fish and not 6 pics of the same individual...

They were in his tanks and suddenly some started to change the colortation:

What we need to know: what is the color of the sand?
Is the light of your tank not too bright?
Do you have any furniture that is rather bright or yellow/orange and where these fish would usually hide... Mimetism is often use by fish to protect themselves...from others

Cheers
Yann

PauloSR · Post by **PauloSR** » 23 Aug 2004, 02:08

yannfulliquet wrote:I understand what Paulo mean: this is in fact 3 different fish and not 6 pics of the same individual...

They were in his tanks and suddenly some started to change the colortation:

The photos are of 4 different fishes.
Photo 1 and 2 are of the same fish, 3 and 4 are of another, 5 is of another, 6 and 7 are of anotherâ?¦
And yes, they suddenly started to change the colorationâ?¦

yannfulliquet wrote:What we need to know: what is the color of the sand?
Is the light of your tank not too bright?
Do you have any furniture that is rather bright or yellow/orange and where these fish would usually hide... Mimetism is often use by fish to protect themselves...from others

There is no sand in the bottom of the tank, only glassâ?¦
The tank is in a dark place, with practically no light (to reduces the stress) â?¦
The furniture reduces to some wood (the color of the wood is dark brown)

There it is the photos of the fishes that are in the tank (Of course this container where I photographed them is not the tank):

9

10

11

12
Like you can see there are 5 fishes that changed the natural coloration (remember that all of them had initially its natural color)â?¦
And two of them are yet changing the coloration (see the fish in the middle of the triangle in photos 11 and 12)â?¦
My problem is: What happened to some of the fishes that changed de color???? (Remember that this process in only one fish occurred during some days to change completely the color)â?¦
[[]]s
Paulo

YouTube · Post by **Jools** » 23 Aug 2004, 20:31

I have a group of these fish and have not noticed this behaviour. They are kept in birght conditions on nearly white sand. They are dark and do not change colouration much. In this species it's the yellow / reddness of the fish tha changes the most.

That said, I wonder if it is a whole load of fish in a holding tank that might produce this reaction? Sub dominant fish go pale?

Jools