Re: [RML] daphnia

Adrian R. Tappin (atappin at ecn.net.au)
Wed, 19 Feb 1997 14:56:27 +1000

At 10:16 19/02/97 +1000, Rob wrote:

>Actually we do have some species that survive through our summer. They are
>not strictly Daphnia though. Daphnia belong to the group of crustaceans
>called Cladocerans. There are about 100 species so far described in
>Australia. The majority belong to the Daphniidae (Daphnia), Macrothricidae
>and Chydoridae. But we also have representitives in the Sididae, Bosminidae
>and Moinidae. How's that for a bunch of useless information? Anyway our
>"summer Daphnia" is actually a "Moina" of which there are five or so
>species. The species that turns up in our ponds is less than half a
>millimetre long, brown to green (depending, I suspect, on what colour algae
>it has eaten), and at times forms very dense blooms that last one to two
>weeks. It persists for most of the year, but seems to be most prolific in
>temperatures of about 25 to 35 degrees celsius. It is also tolerant of
>salinities up to about 15 parts per thousand (about half seawater). And it
>is great rainbow, blue-eye and goby tucker.

Thanks Rob, I always wonder what Cladocerans were - perhaps you could tell
us if it is possible to culture these beasties.

Adrian.
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Adrian R. Tappin
Home of the Rainbowfish
http://www.ecn.net.au/~atappin/home.htm
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