| Summary: | 碩士 === 國立成功大學 === 生命科學系 === 103 === Seashores and littoral forests are the major habitats for the land hermit crabs. Due to the increasing human recreational activities, many food packages and bottles are found on the beach which may entrap hermit crabs. Smooth surface of these food packaging materials are almost impossible for hermit crabs to climb up. To test the likelihood of hermit crabs die in the food packaging or bottles on seashore. We firstly test their climbing ability on a smooth slope. Secondly, we test whether heat is potential cause of death by comparing the temperature with thermal tolerance data of hermit crabs. To know what drives hermit crabs to go into these packages lastly, we test the preference of hermit crab to solid and liquid snacks. Here we show that glass bottles could easily trap land hermit crabs since there was no hermit crab could climb up a glass substrate with slope steeper than 22˚. Under the sunshine in summer, all of the bottles will reach to 45 for 8 hours at which temperature they can barely withstand for 2 hours. If a hermit crab try to feed on the leftovers in these food packages or bottles and failed to escape, it will very likely die of heat shocked before ten o’clock the next morning. The result of careless seashore litters left on the beach poses greatest risk for the life of local land hermit crabs.
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