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Originally Posted by
Shaggy Hiker
By noon, half the daily temperature sounds about right. So, if we see roughly 20-30 degree (F) daily swings, then seeing 10-15 degrees by noon is about normal, with the rest coming afterwards. You can construe that as a couple degrees C if you'd like.
I already provided evidence to back up my claim regarding the temperature: http://www.ncdc.noaa.gov/paleo/ctl/clisci0.html . If you look at the charts you can see that at midday the temperature is just less than 24 degrees celsius only 2 degrees less that the daily peak. Half the daily peak is reached by 6 am.
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Originally Posted by Witis
You were clearly only referring to hot desert conditions when talking about the impact of cows on desert fish.
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I wasn't, actually. I was referring to Idaho desert conditions. With abundant vegetation, the streams can remain pretty cool. I was happy to sit in one to cool off on a hot desert hike. That stream may have been the east fork of the one in that video, though I think probably not. It was clearly desert (the Inside Desert, officially), and had plenty of fish. It was also thoroughly fenced, so cows have to stay out.
It is not possible for cows to cause overheating of the water in a cold desert. Also I would describe any cold area that does not receive very much rainfall a cold and arid area or a cold desert rather than desert as the default meaning for desert is hot rather than mild or cold probably because hot deserts cover more of the earth's surface:
http://www.mapsofworld.com/images/world-desert-map.jpg
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Originally Posted by Witis
Sure he did, "In that video I posted Dan Schill also detailed that he did not consider redband trout to be desert fish and called them a rainbow trout that happens to live in the coolest parts of desert rivers and streams."
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Ok, so what? Those are the fish that we are trying to protect when we fence cows out of the water (well, them and salmon, depending on the exact stream). The fish are native to the streams in question, too, which means that we didn't put them there. The streams are in deserts. The rest is all semantics.
The problem is that the trout have not yet evolved enough to withstand the heat of the desert sun and fencing off the river banks is unlikely to substantially reduce the water temperature for the reasons I have provided.
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Originally Posted by Witis
At last you finally admit that trout are not a desert fish adapted to withstand warm water or no water, and no I obviously don't mean cold desert!
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Which wasn't any part of the argument, so it has nothing to do with anything at all. The very point of this discussion was that the vegetaion was keeping the water cool enough for the trout, and cow grazing would wipe out the vegetation, which would raise the temperatures to lethal limits and wipe out the trout, which are native. Of course they aren't adapted for hot water, or else that whole point would have been invalid. The very reason I was opposed to cows out there was because their impact caused the water to be too hot for the fish.
I put it to you, once again, that there are not a large number of tall trees lining the majority of the desert rivers and streams and even if there were the sun drives the water temperature by heating the air and water and it has most of its impact around midday when trees provide little to no shade.
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By the way, I realize that there are fish that can withstand desication, but I'm not aware of any such species in this state or these deserts.
If I was looking at all of the species of (hot) desert fish native to he U.S., including the endangered species, I'd have to investigate each species to determine which ones are most adapted for the conditions.
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Originally Posted by Witis
Did you eat that sort of conch:
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Probably not, though I don't know what kind of conch I ate. For that matter, considering how it was prepared, I'm not actually sure that I had conch at all. It could have been minced rubber bands for all I know. Tasted good, though, whatever it was.
That Florida horse conch is one of the largest sea snails in the world, although it is not a true conch as it is not in the family Strombidae.
http://media-cache-ec0.pinimg.com/73...705217ee4e.jpg