Two 17"-18" Murray cods, 2 year old

qldmick

Plecostomus
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Jul 23, 2016
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Yeah 100% was temps. They just don’t liken it hot. Warm for that matter. They stress easily as well so you’ve probably got the two biggest killers up against them.
Calling bull on old mate about them being okay at 30. Maybe for a couple of days but not much longer than that.
To be honest I did lose a few but the majority survived, The water temp did get to 33oC that I measured and could have been more. I tried to find water temps for the local dam but looks they don't record/list them. Murray Cod are native where I am and air temps get to about 40oC where I am, they also occur in much cooler climates. Heavy breathing may be a sign of lack of oxygen, potentially caused by the warmer water.
 

Friller2009

Aimara
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Oct 27, 2021
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To be honest I did lose a few but the majority survived, The water temp did get to 33oC that I measured and could have been more. I tried to find water temps for the local dam but looks they don't record/list them. Murray Cod are native where I am and air temps get to about 40oC where I am, they also occur in much cooler climates. Heavy breathing may be a sign of lack of oxygen, potentially caused by the warmer water.
In a river you've got big differencials in temp. Shallow banks are very hot. Mid water is different to that. The bottom is often crazy different than the air outside. They'll live in high temps for a while, but not very long.
 
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qldmick

Plecostomus
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Jul 23, 2016
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In a river you've got big differencials in temp. Shallow banks are very hot. Mid water is different to that. The bottom is often crazy different than the air outside. They'll live in high temps for a while, but not very long.
I do agree with you. I added some shade cloth around the exposed IBC sides when I noticed the high temps, the other two sides were already shaded by the fence.
Here's some of the locals, first one from the local river and second one a nearby dam (our water supply).
PA181188 - Copy - Copy - Copy.JPG
1627368877876 - Copy.jpg
 

Friller2009

Aimara
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surfermike915 surfermike915 think you’d like this.
Probably would have to get it shipped to the states. Got mine from Angfa nsw.
AB160DC4-9011-454B-B94E-CA504671A4CD.jpeg0A3D9519-370D-4E5F-8CE9-29F429AF5BB5.jpeg799A2185-55E6-4D51-80BC-444D067569F2.jpeg
 

thebiggerthebetter

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from yt from my Australian peer with whom we speak sometimes

paulstingray Wasn’t too hot? My big one hates the temperature over 25c / 77f and tends to go off his/ her food
Fish-Story The Taiwan farmer from whom these fish came said they keep theirs at up to 30C / 86F. It's water was at 86F in the prior tank and 82-83F in the new tank.
paulstingray They are a cold-water fish, I live in the subtropics in AU and only keep one larger Murray thats around 90cm now, summer is a right pain here, mine is currently at 14.5c / 58.1f (winter) and is super active. They are not native to my area but when it's hot they tend to go into deeper cooler water from what I believe.
Fish-Story Right. Thank you, Paul. It's pretty obvious our 2 pairs of cod died from too warm water.
 

Friller2009

Aimara
MFK Member
Oct 27, 2021
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from yt from my Australian peer with whom we speak sometimes

paulstingray Wasn’t too hot? My big one hates the temperature over 25c / 77f and tends to go off his/ her food
Fish-Story The Taiwan farmer from whom these fish came said they keep theirs at up to 30C / 86F. It's water was at 86F in the prior tank and 82-83F in the new tank.
paulstingray They are a cold-water fish, I live in the subtropics in AU and only keep one larger Murray thats around 90cm now, summer is a right pain here, mine is currently at 14.5c / 58.1f (winter) and is super active. They are not native to my area but when it's hot they tend to go into deeper cooler water from what I believe.
Fish-Story Right. Thank you, Paul. It's pretty obvious our 2 pairs of cod died from too warm water.
I know Paul. Bit crazy but great bloke.
 

surfermike915

Piranha
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Aug 10, 2022
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