Hello all, little bit of set up and turtle info first then I'll have my question in the bottom.
I have 1 map turtle and 1 yellow belly turtle in a huge 125 or 160 gallon tank and the water is about 16-18 inches deep. The Map turtle is a full grown adult male (I think, it's texas map and it's 4 inches long) and the Yellow Belly is a young teen, close to 2 inches long.
The habitat is very nice, live plants, family(s) of guppies in the warm summer months, 2 caves, tons of rock bridges (made by piling flat rocks) to go through and sleep under and plenty of places to hide from predators (or my hand, I guess) and a very nice basking spot made of cork board wedged between the aquarium width, also UV lights and an area of sandy/diggable gravel where they can dig and bury themselves (rest of the aquarium has head-size rock gravel, I achieved this by pouring digging gravel in a pan and submerged it at the bottom of the aquarium).
My turtles and the aquarium is located in my garage and I live in Canada, Ontario, Mississauga.
I'm confident that the setup and diet I provided them is the best anyone can ever could in an aquarium.
Until it got cold and they stopped eating, I fed my turtles a healthy diet of live fish (I breed guppies for feeding purposes), vector cereal (since it's nutritious I thought it's a good idea, fed this to them quite a bit and never had a problem), anchovies, live plants/green veggies and when I feel lazy, I sometimes fed them turtle pellets.
Once they stopped eating, it was starting to get cold so I figured it's time for hibernation and I just waited for them to fall asleep.
----------- MY QUESTION -----------
It's been about 5-7 days since I started to notice they are sleeping a LOT more than usual. Now I'm at the point where I rarely see them with their eyes open.
But here's the weird thing, they aren't exactly sleeping permanently. Every time I go check up on them (3-5 hour intervals usually, depending on my day) they're always sleeping in a DIFFERENT spot. This gives me the sign that they wake up multiple times in a day. And sometimes I catch them with their eyes open and slightly moving their position.
Why is this? Is the weather simply not cold enough and that's why they're moving about multiple times a day? Here where I live, Canada Ontario Mississauga - it already got as cold as 0 degrees Celsius just few days ago.