Today in our marine biology lecture, we'll discuss the migration patterns of the humpback whale. These whales travel up to 16,000 kilometers each year from cold feeding grounds to warm breeding waters. Interestingly, they navigate using the Earth's magnetic field, but recent studies show that ocean currents also play a key role. For example, a 2023 tracking project found that whales often take advantage of strong currents to save energy, reducing their travel time by up to 20%. However, this strategy can be risky if currents shift due to climate change, potentially leading them off course. So, while magnetic fields provide a general direction, currents refine their route.
❓ 根据讲座内容，2023年的追踪项目揭示了关于座头鲸的哪些信息？
A. A. 它们仅依赖地球磁场进行导航。
B. B. 他们利用洋流将航行时间缩短了约20%。
C. C. 它们在觅食区和繁殖区之间仅进行短距离迁徙。
D. D. 气候变化已经导致它们改变了迁徙路线。
✅ 正确答案
B. They use ocean currents to reduce travel time by about 20%.