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Thread: Cold empties Bolivian rivers of fish

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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by spud_meister View Post
    that depends on many factors though, and due to the amount of dead fish, the predators could recover faster and send the ecosystem out of balance, or it could cause algae blooms which could kill the rivers, anything could happen, but according to the article, there could be more to this than just the cold.
    I think they are right about infection TBH. Something was "fishy" excuse the pun because of the very cold blooded nature of fish most species can survive excessive cold, they just go into a type of hibernation. The reptiles on the other hand though I could totally see that being a "cold kill". Overall you're right though, too many factors to predict a final outcome.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by LaMidRighter View Post
    I think they are right about infection TBH. Something was "fishy" excuse the pun because of the very cold blooded nature of fish most species can survive excessive cold, they just go into a type of hibernation. The reptiles on the other hand though I could totally see that being a "cold kill". Overall you're right though, too many factors to predict a final outcome.
    The sudden water flip can kill them pretty fast.

    Even though they usually adapt to colder temperatures.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by Harry Guerrilla View Post
    If it is a cold snap in a usually not cold area, that water flipping will definitely kill a ton of fish.

    I see it all the time around here with season change and private ponds.
    A cold snap, out of no where, will decimate a private stock pond.
    It depends on the species too. Tropical fish don't have a very good margin of error where temps are concerned, I think about 10 degrees one way or the other. These particular species are tougher I think but not sure.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by LaMidRighter View Post
    It depends on the species too. Tropical fish don't have a very good margin of error where temps are concerned, I think about 10 degrees one way or the other. These particular species are tougher I think but not sure.
    My grandfather has a catfish pond, here in the winter it can get pretty cold.
    Usually near or under freezing.

    His whole pond was killed off from a cold snap, these guys are even more tolerant of cold than tropical fish are.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by Harry Guerrilla View Post
    My grandfather has a catfish pond, here in the winter it can get pretty cold.
    Usually near or under freezing.

    His whole pond was killed off from a cold snap, these guys are even more tolerant of cold than tropical fish are.
    Rivers hold heat better than ponds, when ponds are frozen over river still flow, and while the cold played an undeniable part, it looks like it may have been more than that.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by Harry Guerrilla View Post
    My grandfather has a catfish pond, here in the winter it can get pretty cold.
    Usually near or under freezing.

    His whole pond was killed off from a cold snap, these guys are even more tolerant of cold than tropical fish are.
    Eeesh! It does happen, catfish are pretty tough too. I dunno, that had to be one hell of a swing though and I think the "climate scientists" are taking a huge leap in the AGW direction instead of trying to figure out why the temperature swing happened and if it has cyclical or historical relevance.
    Neither side in an argument can find the truth when both make an absolute claim on it.

    LMR

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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by spud_meister View Post
    Rivers hold heat better than ponds, when ponds are frozen over river still flow, and while the cold played an undeniable part, it looks like it may have been more than that.
    Even then, the sudden stress is what can cause the deaths or at the very least weaken the bodily defenses of the fish.

    So it is true that disease could of landed the finishing blow.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by LaMidRighter View Post
    Eeesh! It does happen, catfish are pretty tough too. I dunno, that had to be one hell of a swing though and I think the "climate scientists" are taking a huge leap in the AGW direction instead of trying to figure out why the temperature swing happened and if it has cyclical or historical relevance.
    It happened 'cause Antarctic weather is a bitch in Winter, I doubt global warming had a part in this.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by spud_meister View Post
    It happened 'cause Antarctic weather is a bitch in Winter, I doubt global warming had a part in this.
    That was my thinking as well. I thought the story read a little too AGWish though. I know I certainly couldn't get paid nearly enough to live or work that close to the poles.
    Neither side in an argument can find the truth when both make an absolute claim on it.

    LMR

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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by Harry Guerrilla View Post
    Even then, the sudden stress is what can cause the deaths or at the very least weaken the bodily defenses of the fish.

    So it is true that disease could of landed the finishing blow.
    Yeah, so until there's studies done, we can only speculate.
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