On his Wikipedia page, in the 1966 - 1975 section it says it took a lot of persuasion to get him to use the wheelchair. This suggests that he wasn't in dire need of it at that point. His first child was in 1967, the last in 1979.
6. Extremely high ammonia levels in the water can damage the outer layer of skin and cause shedding. RES are tolerant of high ammonia levels while map turtles are not, so this problem is more likely to occur with Graptemys species.
They have special chemicals in their blood that can keep their blood from freezing. As a result, baby painted turtles can survive freezing temperatures! This is the cause Use the signal words to identify the cause and effect in this paragraph. Baby painted turtles spend all winter in their nests.