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Old 05-01-2012, 04:40 PM
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Default temperature longevity

Ive had darts for about 6 months now... I know suggested temp range is 70-80 F. my question is , is there a thresh hold for how long frogs can be exposed to 80 or 81 degrees and still be safe, or as long as it doesnt climb above 80 is that okay.
my temps in my vivs right now are at 80 for a few hrs in the afternoon b/c ambient temps in my house have been about 78.
is it okay for the temps to be at 80 for a few hrs and then cool back down at night, or should I try to limit it from reaching 80 at all?
thanks
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Old 05-01-2012, 04:52 PM
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What species are you keeping?
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Old 05-01-2012, 04:56 PM
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Default Re: temperature longevity

Where are you reading the temp in the viv at the top. In mine it will read 79 to 80 near the top,and while at the substrate it is 75 to 76.
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Old 05-01-2012, 06:09 PM
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Default Re: temperature longevity

What the OP is talking about is a function of what is called the critical thermal maxima for a species. The problem is that this heavily dependent on many other factors (for example prior temperature acclimation, rate at which the temperature increases, photoperiod acclimation, ability to behaviorally or physiologically modify it's body temperature (evaporative cooling!)). Not free access but see JSTOR: Physiological Zoology, Vol. 41, No. 4 (Oct., 1968), pp. 432-439

JSTOR: Physiological Zoology, Vol. 35, No. 2 (Apr., 1962), pp. 148-156

Oecologia, Volume 2, Number 2 - SpringerLink


In general, if your tank is tightly sealed, the frogs are probably going to begin to exhibit issues at a lower temperature than those that can utilize some physiological issues (not free access but see
Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, Volume 73, Number 1 - SpringerLink

http://www.jstor.org/discover/10.230...21100760959381
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Old 05-01-2012, 06:40 PM
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Default Re: temperature longevity

ive got Tincs and Leucs.
thanks Ed for the scientific material.. Im a biology grad, so that will help me.
any other advice from past experience with Tincs and Leucs will be appreciated too.

also the 80 degree readings in the late afternoon have been at substrate level...they typically are down to 73 in the morning

Last edited by jharris08; 05-01-2012 at 06:45 PM.
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Old 05-01-2012, 10:56 PM
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Default Re: temperature longevity

Quote:
Originally Posted by jharris08 View Post
ive got Tincs and Leucs.
thanks Ed for the scientific material.. Im a biology grad, so that will help me.
any other advice from past experience with Tincs and Leucs will be appreciated too.

also the 80 degree readings in the late afternoon have been at substrate level...they typically are down to 73 in the morning
If we look at temperature ranges in thier natural habitat we can see that they are often exposed to temperatures well in excess of those (and I've temperature gunned a dart frog in a vented tank foraging with a skin temperature of over 90 F....) (as an anecdotal note (I still have that frog). In fact some of the recommendations go against behaviors of the frogs for example, people often keep thier auratus tadpoles cooler than the temperatures chosen by the frogs as ideal (26 C..) see
Amazon Amazon

Now when people tightly seal the tanks to maximize the humidity and thus breeding and activity they also are preventing the frogs from being able to regulate thier body temperatures, which is why you see the recommendations to keep the frogs much cooler than their enviroment in the wild..which reduces the CTmax of the frog....

Ed
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Old 05-02-2012, 12:41 PM
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Default Re: temperature longevity

that makes a lot of sense now.. b/c I have been to Costa Rica 2 times and have seen D. pumilio and D. auratus in the wild, functioning just fine, within a temperature range of 25-30C.
I have the hinged lids on my tanks, so I might look at a way to provide a slight ventilation for them.
thanks for your all your help.
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Old 05-02-2012, 04:16 PM
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Default Re: temperature longevity

Quote:
Originally Posted by jharris08 View Post
that makes a lot of sense now.. b/c I have been to Costa Rica 2 times and have seen D. pumilio and D. auratus in the wild, functioning just fine, within a temperature range of 25-30C.
I have the hinged lids on my tanks, so I might look at a way to provide a slight ventilation for them.
thanks for your all your help.

A friend of mine likes to describe the time while checking out the bastimentos populations he found a pumilio out in the sun on a bare stretch of sand during midday......

Ed
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