I’m interested in learning more about turtles in dormancy. I have seen some footage that the social media video world gives me of a go-pro/trail cam type camera that plunges through an icy river bed some 3-4 feet to see a mud-covered turtle brumating. What are some signs that could reveal a brumation site (ie at the bank). I’m not trying to disturb them in anyway, so would shining light in water disturb them if they are in a semi-conscious state? Finally, if I do encounter them, is it unadvisable to post the location on iNaturalist since they are in a vulnerable state?
1 Like
Not sure about signs that a site is occupied, but a light probably won’t bother them much as long as it’s brief and temporary. I agree that posting an exact location might be problematic, so just be sure to obscure the location. Here are a few relevant review papers from the scientific literature that may or may no be what you’re looking for.
Gregory, P. T. 1982. Reptilian hibernation. Pages 53-154 in C. Gans and F. H. Pough, editors. Biology of the Reptilia: Physiology D, Physiological Ecology. Academic Press, London.
Ultsch, G. R. 1989. Ecology and physiology of hibernation and overwintering among freshwater fishes, turtles, and snakes. Biological Review 64:435-516.
Ultsch, G. R. 2006. The ecology of overwintering among turtles: where turtles overwinter and its consequences. Biological Review 81:339-367.
2 Likes
I don’t think there are any signs at the bank. The sign of a brumating turtle, is that you spot the turtle, or you detect it by telemetry, or by other means.
If you care about the turtle, then shining a light on it is probably not a great idea.
Brumation, like surviving winter for many animals, is a gamble that the animal’s energy reserves will last longer than deceiving warm spells, harassment by predators (like dogs chasing deer), etc. Every calorie counts, so even minor stressors could be the difference between life and death, especially during a long or harsh winter.
If you make a hole in the ice, then you are also drawing attention to the location, which could lead to more harassment.
Yes, it is unadvisable.
2 Likes
and if interested in turtles - that is part of this week’s target on the ID-a-thon.
Your iNat Needs You!
2 Likes