Abstract:
We present the first photographic records of the tiger shark (Galeocerdo cuvier) at the remote Rapa Nui (Easter Island) in the south-east Pacific. Previous anecdotal sightings exist for tiger sharks in this region; however these records have not been reported within the scientific domain. The present sighting occurred in a period of unusually warm sea surface temperature, which has been shown to influence tiger shark range extensions elsewhere. Novel and historic species occurrence records are valuable for determining and predicting species\' environmental tolerances, migratory routes, and distributional limits.
摘要:
我们在东南太平洋偏远的拉帕努伊岛(复活节岛)展示了虎鲨(Galeocerdocuvier)的第一张摄影记录。该地区以前有关于虎鲨的轶事;但是这些记录尚未在科学领域内报道。目前的观测发生在海面温度异常温暖的时期,这已被证明会影响其他地方的虎鲨范围扩展。新的和历史性的物种发生记录对于确定和预测物种的环境耐受性是有价值的,迁徙路线,和分配限制。