Re: [RML] New Question

Scott.Hunt at mailhost.dpie.gov.au
Wed, 30 Apr 1997 15:57:19 +1000

>If the size differential is too large, the bigger ones may seek to make a meal
of the smaller >ones.

I would seriously doubt this. In my experience, it's a territorial issue not a
food thing. Unless of course you're putting fry in the tank. ;-)

>I recently released 6 lacustris and 3 praecox about 1 to 1.5 inches long into
my large community >tank of trifasciatas (about 4-5 inches), and the
trifasciatas chased the lacustris and praecox >around the tank

Praecox are generally better kept on their own or with fish of a similar size.
I've kept them at various times with Maccullochi, Pygmaea & Rhads. They are shy
fish (and easily stressed) and they will not do well with big tri's. I do know
people who successfully keep Praecox in 'bow community tanks, but then they
don't have 5in tri's swimming around! ;-)

>Even if the larger bows don't terrorize the smaller ones, in my experience,
the smaller ones >have their growth retarded due to being outcompeted for food.

Many times I have placed some juvenile fish in a community tank and left their
siblings in a grow out tank. Even if you select the fast growers for the
display tank, the fish in the grow out tank (with similar sized tankmates) will
soon overtake them in size.

Cheers.
Scott Hunt

rainbowfish-owner#064#pcug.org.au - SMTPGATE at WT400 on 30/04/97 03:30:43 PM
To: rainbowfish#064#pcug.org.au - SMTPGATE at WT400
cc:
Subject: Re: [RML] New Question

At 08:49 PM 4/29/97 -0600, Jim wrote:
>Hey Everybody...
>
>Is there anything to be said about keeping juveniles with older
>rainbows? I ask because I am about to receive some juvies (lacustris,
>goyders) as well as some herbies about 7-8 months old. Seems I read
>something on the list about different diets and/or different feeding
>frequencies? How about the older ones terrorizing the youngsters or
>other non-compatabilities? Any sort of feedback on this issue will be
>welcome...
>

Hi Jim,

How big are your older rainbows in comparison with your juveniles ? If the
size differential is too large, the bigger ones may seek to make a meal of
the smaller ones. I recently released 6 lacustris and 3 praecox about 1 to
1.5 inches long into my large community tank of trifasciatas (about 4-5
inches), and the trifasciatas chased the lacustris and praecox around the
tank. So much so, that some of the the juveniles died of stress a few days
later. I had to scoop the remaining ones out and move them to a smaller
tank to allow them time to grow out. Even if the larger bows don't
terrorize the smaller ones, in my experience, the smaller ones have their
growth retarded due to being outcompeted for food.

Chen Leong