Re: Light Cycle Experiments?

["Scott Davis" <unclescott at prodigy_net>]

> Changing day length is likely to be more important well away from the
> equator. I don't know if Pachypanchax are sensitive to it, but they
> respond well to a cold season, apparently.
>
> I once sterilized a whole strain of guppys by keeping them in a basement
> with constant light, 24 and 7.
>
> Wright

Dan Fromm noticed, in a JAKA article back when, to his surprise, that
Rivulus from the Isthmus of Panama (approximately 10 degrees North) were
influenced by the length of day.

Madagascar is 20 degrees (plus or minus) South. It stands to reason that
that place's killies might also be sensitive to changes in the length of the
day. Many of the Aponogetons from Madagascar (plants popular with some
aquatic plant fanciers)  also have seasonal cycles, although they may be
tied to other factors.

All the best!

Scott


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