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 Post subject: River Blackfish
PostPosted: Jun 20th, '08, 09:23 
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Has anyone found any information or research on the aquaculture/aquaponic potential of River Blackfish?


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 Post subject: Re: River Blackfish
PostPosted: Jun 20th, '08, 14:57 
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I'm pretty sure breeding river Blackfish for aquaculture is not allowed
because of the two sub species off river Blackfish.

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 Post subject: Re: River Blackfish
PostPosted: Jun 20th, '08, 15:34 
I see the article refers to it as "marbled cod" Gadopsis marmoratus...... don't know if they've been researched as an aquaculture fish... but....

Attachment:
Gadopsis marmoratus.jpg
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There's a growing interest in both aquaculture and re-stocking Oxyeleotris lineolatus, more commonly known as "Sleepy Cod"....

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sleepycod.jpg
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The Sleepy Cod is a very close cousin of a South East Asian fish known as the "Marbled Goby" Oxyeleotris marmoratus ... (also known as the "Sand Goby")....

Attachment:
Oxyeleotris_marmoratus.jpg
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Notice the same name "marmoratus"...... so they would seem to be very similar...

Sleepy Cod are considered to be amongst the best freshwater fish in terms of taste and are highly regarded in Asia....fetching huge prices...

Strangely... they're both listed as "gudgeons"....

http://www.tams.act.gov.au/__data/asset ... idgee7.pdf

http://www.sciencedirect.com/science?_o ... ac235de7b3

Jim Farr of "autopot" fame grows Sleepy Cod in his shop in Vic.... and fingerlings are readily available...

Very similar, but different ... it would seem... think KEII was growing "Sleepy Cod".... would do well down south... but slow growing I think


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 Post subject: Re: River Blackfish
PostPosted: Jun 20th, '08, 18:13 
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Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Minimum temp of 18 deg c though :(

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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 06:42 
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Outbackozzie wrote:
Minimum temp of 18 deg c though :(


The reason I was after the info is because they share many of the pro's of fish like sleepy cod (sought after flavour & texture, but med-slow growth) but they are a native of the colder areas of victoria and NSW.
I am looking for a fish to match a plant that grows at temps of 12-15 deg.


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 06:49 
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Seriously, this cant be healthy.
Seriously, this cant be healthy.
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What plant do you want to grow so desperately that you want to build a dedicated AP system with matched fish Royale? It must be a pretty special plant.

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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 06:54 
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KudaPucat wrote:
What plant do you want to grow so desperately that you want to build a dedicated AP system with matched fish Royale? It must be a pretty special plant.


shhh Tis a secret :).

Actually is a number of winter vegies that would be nice to have available in summer.


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 10:41 
royale wrote:
I am looking for a fish to match a plant that grows at temps of 12-15 deg.


royale wrote:
Actually is a number of winter vegies that would be nice to have available in summer.


Would seem to be a contradiction Royale..... I know Melbourne isn't exactly tropical... but surely you're be warmer than 12-15 deg in summer :lol:


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 10:48 
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:) The system would need to be well shaded and possibly cooled to maintian that water temp


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 10:56 
Well IF you could pull it off Royale...

Trout would be the obvious choice... readily available, take pellet feed, and grow fast.....

But they need high flow, high DO water... and I think running through an AP system growbeds, you'll gain so much ambient heat in summer... let alone just normal heat transfer from air temps.... that there's not much chance of keeping your water temp below 20 deg....

Unless you're prepared to incorporate and wear the cost of running "chillers".....

What specific veges are you looking at???..... most I can think of will happily grow through summer ... if shaded.....


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 11:08 
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Trout would suit well, but I was more interested in natives.

Eel were looked at and abandoned, they survive but dont grow at those temps. Blackfish and native catfish were the next on the list.
It may be possible to jury rig a solar powered ammonia fridge with its heat exchange in the water sump bringing the cooling costs down.


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 13:00 
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My silver perch are feeding well below 16°C but are much hungrier at 30°C :D
The Tandanus (native catfish) I have seem to be similar but maybe a bit hungrier in colder weather. They haven't grown as much though :shrug:


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 13:07 
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How do the plants go with 30°C water?


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 13:08 
Yippee


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 Post subject: Re: River Blackfish
PostPosted: Jun 23rd, '08, 13:14 
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:)
lol


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