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Retirement and forum shutdown (17 Jan 2022)

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

factors influencing sex of fry

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07 Oct 2009 12:56 #1 by stan (stan)
hey folks,

i remember a while back reading an article on breeding kribensis where it said that ph and tempeture were a big factor in determing the sex of the fry. i think it said the higher your ph the more males are possible

just wondering if the same thing applies to malawi fry and would any one know if there is any other factors which influence this,
i'll try and find the article if anyone is interested
cheers

stan,

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07 Oct 2009 13:41 #2 by pkearney (Phil Kearney)
hi stan.
i remember reading that same article about kribensis years ago.about 7ph is probably the optimum for breeding to get a good spread of males and females. i dont malawis would be too inclined to breed under 7ph so i dont think the same would apply!
phil

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07 Oct 2009 13:49 - 07 Oct 2009 13:53 #3 by stan (stan)
tried finding the article but no joy,
i did a seach on google and read a few articles mostly scientific papers but no direct factors,

not the original article but still of interest

www.cichlidae.com/article.php?id=100
Last edit: 07 Oct 2009 13:53 by stan (stan).

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11 Oct 2009 15:14 #4 by derek (Derek Doyle)
hi stan
lake malawi fish are unlikely to be affected by these factors as the large lakes water parameters such as temp ph hardness dont fluctuate much if at all
river fish on the other hand live in a changing environment re rainy season floods causing dilution, water depth fluctuation etc. drought and evaporation must also be factors.
most of the river fish we keep, originate in shallowish backwaters with probable build-up of rotting vegetation creating lower ph. i imagine that when the rains arrive the ph will raise and the water becomes deeper and cooler.

commercial malawi breeders of aulonacaras and ahli usually cull out smaller specimens at around a month and grow out the larger fish ensuring more coloured males result.

anyway just a few thoughts on an interesting topic.

30 tanks specialise in african cichlids, angelfish and various catfish

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11 Oct 2009 20:05 #5 by pointer28 (Noel Lambert)
Hi Stan,

I just bought a book last weekend about South American Dwarf Cichlids and there is a chapter in it about just what you are mentioning.

If you're at the IMAS meeting on Wednesday I'll bring it with me.

Noel

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12 Oct 2009 00:39 #6 by sheag35 (Seamus Gillespie)

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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13 Oct 2009 10:30 #7 by stan (stan)
cheers for those links seamus, some good reading in them
noel, that would be great if you could bring that book,

see ye on wednesday

stan

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