Re: [RML] P. cyanodorsalis revisited

Mach T. Fukada (fukada at aloha.net)
Tue, 26 Jan 1999 14:00:40

Hi Bruce, it gets more intresting and more intresting all the time. Next
question is can the eggs manage a short daily period of no water. Maybe
like the grunions of pacific coast, USA. Might make for another intresting
study. See if the eggs develop in high humidity, moist organic debris.
Suppose the get laid there at the interface, go dormant until the next
major high tide, perhaps associated with the changing of the seasons. Wow,
annual fish in OZ.

MTF

At 08:26 AM 1/27/99 +1000, you wrote:
>Thanks for the info on Crab Ck Dave
>
>No wonder aquarists in Melbourne had no luck with them - that population
>probably is as close to pure marine as any. I would assume that they spawn
>at the surface/substrate interface mostly includidn on any grasses and
>sedges that grow there.. I can't imagine them diving any deeper than1-2 feet
>at the most to spawn. My observations of aquarium behaviour have rarely seen
>them below the top 6inches.
>
>My guess is that the only reason that Crab Ck doesn't have 2 feet or more of
>the same slippery fine mud on the substrate is that the tidal movement is
>strong enough to wash it all away and expose the underlying shellgrit. I
>don't think there will be too many still areas in the creek except perhaps
>on the margins.
>
>
>Regards,
>Bruce.
>
>Bruce Hansen, A.N.G.F.A., Advancing Australian Aquatics.
>
>Bruce Hansen, ANGFA, caring for our aquatic ecosystems.
>
>Please visit us at http://www.ozemail.com.au/~fisher/angfa.htm
>
>
>-----Original Message-----
>From: David Wilson <rwilson at taunet.net.au>
>To: rainbowfish at pcug.org.au <rainbowfish at pcug.org.au>
>Date: Wednesday, 27 January 1999 1:16
>Subject: Re: [RML] P. cyanodorsalis revisited
>
>
>>Mach
>>I lived in Broome 1986 - 1988 and fished regularly in Crab Creek. I saw
>>cyanodorsalis but never collected any specimens for the aquarium. I can
>>comment about the environment they come from.
>
>
Mach T. Fukada, Editor
Note New E-mail address:
fukada at aloha.net
Honolulu Aquarium Society
http://www.geocities.com/Heartland/Meadows/2948/HASF.html