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Tropical Aquariums
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Tropical Freshwater Fish
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Photo "tropism" in fish
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Hi,
John Howell who has managed the forum for years is getting on and wishes to retire from the role of managing it.
Over the years, he has managed the forum through good days and bad days and he has always been fair.
He has managed to bring his passion for fish keeping to the forum and keep it going for so long.
I wish to thank John for his hard work in keeping the forum going.
With John wishing to "retire" from the role of managing the forum and the forum receiving very little traffic, I think we must agree that forum has come to a natural conclusion and it's time to put it to rest.
I am proposing that the forum be made read-only from March 2022 onwards and that no new users or content be created. The website is still registered for several more years, so the content will still be accessible but no new topics or replies will be allowed.
If there is interest from the ITFS or other fish keeping clubs, we may redirect traffic to them or to a Facebook group but will not actively manage it.
I'd like to thank everyone over the years who helped with forum, posted a reply, started a new topic, ask a question and helped a newbie in fish keeping. And thank you to the sponsors who helped us along the away. Hopefully it made the hobby stronger.
I'd especially like to thank John Howell and Valerie Rousseau for all of their contributions, without them the forum would have never been has successful.
Thank you
Darragh Sherwin
Photo "tropism" in fish
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19 Jan 2011 22:57 #1
by Jim (Jim Lawlor)
bit of a frivolous comment but :
I've a Fluval Vicenza 260l which has a light built into the stand at the front of the tank - so when you turn it on, the light comes from underneath the tank.
If I turn it on on its own, i.e. without the lights in the hood being on, a lot of my tetras start to swim upside down.
Obviously gravity doesnt have as strong an influence as light in determining which way is up!
Just thought it was an interesting if usless bit of info!
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19 Jan 2011 23:45 #3
by platty252 (Darren Dalton)
Thats an interesting observation Jim.
I would have taught the position of the swim bladder would have determined which way was up for the fish.
Although phototrophic larvae will be attracted to light regardless of were it comes from and if the light is to strong they will be repelled from it.
Maybe this is something that dosent leave them in adulthood.
I know some danio are attracted to light even as adults.
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19 Jan 2011 23:47 #4
by des (des)
that's weird
can't think why this might happen but a video would be cool
interesting to see
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20 Jan 2011 00:22 #5
by mickdeja (Mick Whelan)
You know what to do Jim, whack the pics and vids out.
Mick...
Follow me up to Carlow
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20 Jan 2011 23:40 #6
by Jim (Jim Lawlor)
I'll see what I can do in the mornings at the weekend and as soon as I get a bit of footage, I'll lash it up.
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21 Jan 2011 01:45 #7
by igmillichip (ian millichip)
Interesting. Maybe even bizarre.
What colour is the light and what aspect does it hit the fish from?
Light does have some psychological effects, so this is something worth looking into.
ian
Irish Tropical Fish Society (ITFS) Member.
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21 Jan 2011 01:53 - 21 Jan 2011 01:54 #8
by sheag35 (Seamus Gillespie)
the only time i ever encounter this was with fish in a bare bottom tank where when the light goes on imo they cant differentiate sky from bottom till natural instincts kick in... only my observation and is what i suppose happened cause because once a thin layer of substrate was put into the tank this stopped...
Fishkeeping the Only way to get wet and wild
currently 25 tanks, and breeding is the aim of everything i keep
location:Limerick
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Tropical Aquariums
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Photo "tropism" in fish
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