科研之友
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摘要
I studied a Wood Turtle (Glyptemys insculpta) population in Vermont for 25 y and I monitored a subset of the turtles using radio-telemetry. Adults comprised 95% of the individuals I captured annually. Females ranged further from the stream than did males, and remained in the uplands for as long as 54 days. Females traveled up to 1.6 km to nest and males patrolled as much as 1.2 km of the stream. Turtles often showed fidelity to hibernacula, but moved to new locations if protective structures in the stream were lost. They also returned to upland sites. Wood Turtles often used cover on land and moved to cover when they detected my presence. Overall, 58.5% of adult turtles suffered predator injury. When combined with mechanical damage, the injury rate was 68.3%. Males were more likely than females to be missing feet (43.5% vs. 5.5%), but suffered tail loss less frequently (21.7% vs. 66.6%) than females. None of the juveniles I encountered had injuries to the limbs or tail. I documented the death of four adults during the study period. One female was killed by a vehicle strike and another female appeared to have drowned. One male was killed by a Fisher (Martes pennanti) and I suspect that a second male was also killed by a Fisher.
- 出版日期2013-4
