Ayu are short lived, they live like salmon, spawn, die and the next
generation repeats the cycle in 2 or 3 years.
I hope that this is helpful.
Ed
Tokyo Japan
>
>Thanks for these informations. Can Leuciscus [Tribolodon] hakonensis be
>kept in
>the aquarium? Do they require cold water? And will they color up in the
>aquarium?
>
>I have heard that Ayu's lifespan is fairy short at 1-2 years. Is this
>true?
>
>Tony
>anutej_at_loxinfo.co.th
>
>Edward Venn wrote:
>
> > Okaay, let's see.... I've got my "Guide to The Fishes of Japan by
>Yamakei
> > Pocket Guides. Leuciscus hakonensis is a 30cm fish that migrates up
>rivers
> > to spawn. They are found in the Chugoku Region (Central Honshu) and
>spawn in
> > June and July. There are 3 other related species.
> > The Ayu, Plecoglossus altivelis altivelis, follows a similar lifestyle.
> > Other members of this family can be found as far as Taiwan.
> > Zacco sp, are as you mentionned trout like cyprinids that inhabit
>coldwater
> > regions of the rivers north of the Kanto Plain. I've seen them in the
>Toné
> > River and in the Moto Arakawa. They prefer clear running water not
>warmer
> > than low 20's(C) and school in groups of 5-10. They breed in early May
>and
> > June when the temperature rises. Males develop breeding tubercules and
>spend
> > time creating sheds in the river bed. Competition is fierce and
>fishermen
> > usually take advantage of this to catch them by putting a female on a
>lead
> > and snagging males that try to cover and lead her to their nest.
>Breeding is
> > similar to a trout's and they pay no further attention to the eggs after
>the
> > fact.
> >
> > I have seen them kept in aquariums, a chiller and brisk areation is
> > necessary. They seem to be hard to wean onto anything other than live
>foods,
> > preferred prey are helgramites.
> > >
>
>
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