Orange pigmentation in roach, what causes it?
- Tengisgol
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Orange pigmentation in roach, what causes it?
We do see this also in other fish; chub particularly and I’ve just seen it on a crucian. Does anyone know what causes this?
First a Wensum roach:
And this one from a stillwater:
First a Wensum roach:
And this one from a stillwater:
Where the willows meet the water...
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Re: Orange pigmentation in roach, what causes it?
You often get various colours present themselves on birds and other mammals. White on Blackbirds and crow members, yellow on greenfinch, Cinnamon on Sparrows etc. I wonder if it is something that goes wrong genetically to throw these odd colours, which I know have been exploited in the past to breed animals of rare colouration for domestication etc.
- Richard Jackson
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Re: Orange pigmentation in roach, what causes it?
This happens often on Lepidoptera and is caused by extreme cold or extreme heat whilst they are in pupal stage , maybe the same thing happens when they are fry having this effect
Last edited by Richard Jackson on Tue May 28, 2019 9:39 pm, edited 1 time in total.
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Re: Orange pigmentation in roach, what causes it?
They’ve been tangoed
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- Wallys-Cast
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Re: Orange pigmentation in roach, what causes it?
I wondered if it could be breeding colours. Some fish like stickleback change or add colour in the breeding season.
Wal.
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Re: Orange pigmentation in roach, what causes it?
I think it would be a bit early Wal, the Wensum roach was caught like that in December.Wallys-Cast wrote: ↑Tue May 28, 2019 6:17 pm I wondered if it could be breeding colours. Some fish like stickleback change or add colour in the breeding season.
Wal.
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Re: Orange pigmentation in roach, what causes it?
Ah, in that case it's obviously its Xmas party colours. (sorry couldn't resist it)..Tengisgol wrote: ↑Tue May 28, 2019 7:31 pmI think it would be a bit early Wal, the Wensum roach was caught like that in December.Wallys-Cast wrote: ↑Tue May 28, 2019 6:17 pm I wondered if it could be breeding colours. Some fish like stickleback change or add colour in the breeding season.
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Re: Orange pigmentation in roach, what causes it?
I thought it was fungal infection. Cannot find much on the internet though?
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Re: Orange pigmentation in roach, what causes it?
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- Phil Arnott
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Re: Orange pigmentation in roach, what causes it?
I suspect it's due to a form of infection possibly causing a malfunction of the chromatophores. The reason I think this may be the case is because I've often seen similar orange patches surrounding a black spot infection. In this case you see an orange spot with a black dot in the middle. It's quite possible that the black spot parasite allows some other infection to enter the skin.