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Re: Notho males per gallon? was: Re: Killie combinations

On 29 Aug 2000,, Doug Karpa-Wilson wrote:

> Just curious, but big does a tank have to be before it can hold 2
> males? How big are their territories? I have 2 Guentheri trios in a 5
> G for the moment, but I was thinking of leaving them there.  I haven't
> seen any aggression between the males, and they both circulate around
> the entire tank.  I think I might take a trio out anyway, but I was
> curious if there was a rule of thumb.  (not well planted, this one,
> just a big ol clump of java moss in the middle.

So you have 4 females and 2 males. If they were wild stock you 
would have one male left, maybe none. But because they have 
grown up and there are more than enough females the stress is 
less intense for them to set up a territory.
I have kept 2 male KOR with 3 females in a 20 cm tank with no 
aggression but had 2 male ORT in a tank with 2 females only to 
have them kill each other. Same with the RAC.
But, my friend has a tank of about 50 rac living together happily. A 
case of too many males to care.

Steve has a large tank but if the zonatus are really aggressive he 
would still have only one male. IF I had a 3 foot tank with 2 male 
ORT I would still have only 1 male after a few days (hours?!). I 
expect the same with a small population of RAC.
I don't expect any problem with nothos like KOR and FOE.

From what I understand GUE can be tough. If it looks like one male 
is getting rough take him out. What you can do is putting 2 
spawning boxes at opp sides of the tank and see what happens. 
Oddly, more eggs will be found in one box relative to the other 
even if it looks like the males are the same. The females base their 
choice on something... very often it is on who survives.
 
> Ah, great, that solves the problem of where to put the whitei!  Their
> tank's too small.

Don't put young whitei with young nothos! I had a group of young 
FOE take a shool of whitei appart! Young fish battling to find their 
place in the great chain of being tend to victimize anything less 
aggressive than themselves. 

Given my experiace with the Simp. group (whitei) they seem pretty 
layed back as far as killis go. From the behaviour of the zonatus it 
would seem to be the same.
Right now I have 3 male whitei F3 in a tank with 1 female and the 
big male is hammering the others. In spite of lush plant growth they 
all have tatterred fins

> How about garderi and striatum?

I have had 2 large male STR with a good size GAR male in a 
community tank with other fish. The GAR was clearly dominant 
over the STR. They seem quite dominating. I wouldn't chance it 
without some other fish to crowd the GAR and keep him in line.

Best of luck

Tyrone Genade

Prof. J. Snoep Lab, Molecular Physiology
University of Stellenbosch
Biochemistry Department
J.C. Smuts Building, Block A
Stellenbosch
7602
Republic of South Africa

Ph: +27-021-808-5880

http://www.geocities.com/tyronegenade/intro.html
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