My animal isn't eating, moving, whatever.

[The Snark]

All animals have biological clocks. What are they doing in the wild this time of year? At this temperature? After they have eaten this amount.? What factors can significantly alter an animal's metabolism and subsequently it's habits and routines?

Do yourself and your animal a favor: research. If at all possible get the in the wild low down.

My bear was fun and playful all summer. Now all he does is sleep!

Common foibles
It was eating then it stopped. How often does that animal receive that much food on a regular basis in the wild? A constantly fully fed animal will eventually experience a change in it's metabolism which can alter anything or everything it does.
The temperature is controlled and stays at... And suppose the biological clock says it's time to dial it's activities down or up regardless of the environment?
The moisture in the substrate or humidity is controlled - regulated. Not so in the wild. Controlled environment defies the animals natural adaptation. It's biological clock isn't going to ignore a few thousand generations of evolution.
It has buried itself. What are those animals doing in the wild at this time of year/temperature/humidity?
It isn't moving like it was. So which is normal?

 

[Outpost31Survivor]

The temperature is controlled and stays at... And suppose the biological clock says it's time to dial it's activities down or up regardless of the environment?
The moisture in the substrate or humidity is controlled - regulated. Not so in the wild. Controlled environment defies the animals natural adaptation. It's biological clock isn't going to ignore a few thousand generations of evolution.

Speaking on AFS and Emperors.

But you see that is the catch-22, they aren't in the wild in its natural environment with its natural temperature gradient, natural humidity gradient, natural flora, natural soils, natural water sources, natural weather shifts, natural seasons, etc.

In captivity, you can not keep them too dry or they will desiccate and die, you can not keep them too cold or they will die, you can not keep them too dry or too cold or it will lead to stuck molts, etc. Scorpions are ectothermic. Keep them at a proper temperature and their metabolism rises. They will eat more and be alot more active but still remain largely sedentary.

We can not replicate their complex biome outside of maybe going bio especially if we live in cold or hot, dry places. Temperate in southern Vietnam where H. silenus inhabits is pretty consistent the whole year round, both night and day.

 

[The Snark]

Scorpions are ectothermic. Keep them at a proper temperature

They, AFS, spend 90% of their lives under detritus or soil that doesn't fluctuate -thermal battery effect, averaging 55-57 F.

 

[Outpost31Survivor]

They, AFS, spend 90% of their lives under detritus or soil that doesn't fluctuate -thermal battery effect, averaging 55-57 F.

But in southern Vietnam the average temperature range between winter and summer is narrow 75F-95F, and differences between night and day temperatures is also low. It is consistently warm all year round, all day long.

I would never keep the scorpions at 55-57F but will let the night temperature drop with a lower temperature setting on my thermostat just not this low.

 

[The Snark]

But in southern Vietnam the average temperature range between winter and summer is narrow 75F-95F,

It doens't matter. Median temperature of the greatest mass with conductivity the most effective form of energy transfer and convective, due to it's nature, the least effective downward upon the mass. Therefore the soil starting just a few inches below the surface won't be significantly affected by the air temperature or radiant heat from the sun. Dig down to three feet and the entire northern and southern temperate zones will be a median of 50 F +/- 5 degrees. Desert, dense forest or wherever with a few anomalies.

Spend a zillion $$$ on air conditioning, or just plant your house 3 feet into the ground. Don't go too heavy on overhead insulation or you will be running a heater a lot instead. Earthship principal.

 

[Outpost31Survivor]

It doens't matter. Median temperature of the greatest mass with conductivity the most effective form of energy transfer and convective, due to it's nature, the least effective downward upon the mass. Therefore the soil starting just a few inches below the surface won't be significantly affected by the air temperature or radiant heat from the sun. Dig down to three feet and the entire northern and southern temperate zones will be a median of 50 F +/- 5 degrees. Desert, dense forest or wherever with a few anomalies.

Spend a zillion $$$ on air conditioning, or just plant your house 3 feet into the ground. Don't go too heavy on overhead insulation or you will be running a heater a lot instead. Earthship principal.

Not much of what you say matters because scorpions are ectothermic animals they require a heat source to maintain proper body temperature in order to survive and for proper metabolism including forest scorpions. 75F-85F day temps and 65F-75F night temps work fine for AFS. I would never risk keeping an AFS in a constant well below 60F because it may suffer a metabolic shutdown and die exposed to these constant temperatures. It can cause stuck molts and poor gestation for gravid scorpions that could lead to aborted embryos.

 

[The Snark]

scorpions are ectothermic

They, some, have the lowest metabolism rate of all animals, plus more. They can make their own heat, in a sense, and the reverse.. https://pubmed.ncbi.nlm.nih.gov/22546512/

I'll try to find the white paper that goes into great detail about the unique metabolism of the scorpion. Fascinating reading, if extremely technical.
This link touches on another aspect of their metabolism. https://pubmed.ncbi.nlm.nih.gov/25499238/

 

[Outpost31Survivor]

They, some, have the lowest metabolism rate of all animals, plus more. They can make their own heat, in a sense, and the reverse.. https://pubmed.ncbi.nlm.nih.gov/22546512/

I'll try to find the white paper that goes into great detail about the unique metabolism of the scorpion. Fascinating reading, if extremely technical.
This link touches on another aspect of their metabolism. https://pubmed.ncbi.nlm.nih.gov/25499238/

In scorpions, thermoregulation is an important key to their metabolism and can prevent fecal impaction. But during severe environmental stresses such as droughts or floods for example they can lower their metabolism in order to survive through it.

Here is a somewhat related topic to the two scientific papers you provided. Palmaneus longimanus (Heterometrus longimanus).

https://www.americanarachnology.org/journal-joa/joa-all-articles/article/download/JoA_v2_p11.pdf