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Aussie fish data
http://byap.backyardmagazines.com/forum/viewtopic.php?f=2&t=1405		 Page 1 of 2
Author:  EllKayBee [ Mar 30th, '07, 11:48 ]
Post subject:  Aussie fish data
found this table put out by RIRDC (govt mob), this answers a few questions people were asking about salinity, optimum temps and time to market - put out in February 2003

[font=Courier New]
Name..........Opt temp c.......Opt salinity ppt........Time to market
Barra...........28-32................0-35...................5 months
Brown Trout......8-18................0-35..................12 months
Eels............23-28.................0-5...............18-24 months
Golden Perch....23-28..................<8.....................no figures given
Jade Perch......20-30..................<5.....................no figures given
Murray Cod......20-25..................<8...............12-18 months (in recirculating, 24 months in ponds)
Rainbow Trout....8-18................0-35...................9 months (in ponds)
Silver Perch....23-28...................4(15 max).......10-24 months (in ponds)

Crustaceans
Marron.............24................<6-8................6-12 months
Redclaw.........23-31................<6-8................6-12 months
Yabbies.........23-31................<6-8................6-12 months
[/font]
Author:  Jaymie [ Mar 30th, '07, 11:50 ]
Post subject: 
thanks Les, that's very helpful stuff
Author:  EllKayBee [ Mar 30th, '07, 11:59 ]
Post subject: 
Might give barra a try next year, should easily fit in the 5 months at around 28c - Mon has set the benchmark here :thumbleft:
Author:  Jaymie [ Mar 30th, '07, 12:08 ]
Post subject: 
was there any info on the starting sizes of the fish?
Author:  EllKayBee [ Mar 30th, '07, 12:18 ]
Post subject: 
looking....looking.....

Quote:
Species options for farm diversification have been summarised in [s]Table 5.5[/s] table above, assuming that the water source will be freshwater (for saline water sources see Inland Saline Aquaculture section). These species have been selected on the basis that they are already commercially cultured in Australia to some degree, so there is a supply of juveniles and market acceptance.


from that, I would say from fingerlings

The paper is about Integrated Agri-Aquaculture Systems (IAAS) in pdf format, I downloaded it sometime in the past and just got around to reading through it.
Author:  Jaymie [ Mar 30th, '07, 12:21 ]
Post subject: 
thanks
Author:  veggie boy [ Mar 31st, '07, 06:06 ]
Post subject: 
Good one Les. I may give a few barra a go next year also - let me know when You are buying later in the year.
Author:  Troutman [ Mar 31st, '07, 10:11 ]
Post subject: 
Not so sure about some of those figures. A 6 month old marron is still pretty small. Most marron take 12 - 18 (or longer) to reach market size.
Author:  EllKayBee [ Mar 31st, '07, 14:30 ]
Post subject: 
Troutman wrote:
Not so sure about some of those figures. A 6 month old marron is still pretty small. Most marron take 12 - 18 (or longer) to reach market size.


Unfortunately they didn't state how old the fish/crayfish were at the beginning of the tests, the marron may have been 6 months old from a hatchery and then took 6-12 months to grow to market size.

The info that I was mainly interested in was the temperature and salinity ranges
Author:  aquamad [ Mar 31st, '07, 18:10 ]
Post subject: 
THanks for that - I have had good growth from my barra, and from your chart see that it will be twice as long to get the same sizes from silver perch - just as well I am going to do Barra and silver perch at the same times :)
Author:  creative1 [ Mar 31st, '07, 20:05 ]
Post subject: 
thanks les
C1
Author:  aquamad [ Mar 31st, '07, 20:58 ]
Post subject: 
If I can get a tank stocked with redclaw at the same time as I get my barra, then I would have one heck of a bbq as they would be ready at the same times :)
Author:  earthbound [ Apr 1st, '07, 08:31 ]
Post subject: 
Mmmm, a fingerling can mean almost anything can't it, I've seen them only an inch long or less, right up to 20-25cm... All classed as fingerlings... :?
Author:  Troutman [ Apr 1st, '07, 15:38 ]
Post subject: 
Yeah you are spot on with that one EB. Trout are sold as fingerlings over a 9 month period and there is a great difference in size from when they are first available to 9 months down the track. Still, some good information on that chart for basic information. Luckily for most of us there is a great difference between optimum temperatures and survival temperatures for a species. Monyas Barra are testament to that.
Author:  monya [ Apr 1st, '07, 18:58 ]
Post subject: 
Althoughm the small ones are now seem to be getting weaker as the temps are lower and the big ones are attacking them. I scooped out a nearly dead one today with most of his tail missing and put him out of his misery....
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