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本帖最后由 tina50 于 2023-1-7 19:15 编辑
1。领航鲸属于海豚家族
Despite their name and respectable body length (five to seven metres), pilot whales are actually members of the dolphin family.
2。群居
Like many other dolphins, pilot whales are highly social, and they live in stable family groups .
3. 疾病和老龄可能是导致搁浅的重要因素,但为什么同一片水域会重复发生搁浅事件?
Why whales strand has perplexed observers since the days of Aristotle. In truth, there is probably no single answer. Disease and old age likely play an important role, but they cannot easily explain why pilot whales strand in such large numbers, and often in the same spot. For example, in 2009, 80 pilot whales came ashore in Hamelin Bay, Western Australia. Nine years later, another 150 whales stranded on the same beach.
4. 搁浅都发生在平缓倾斜的沙质海滩上,有些海滩的倾斜度小于0.5%, 导致收不到回声定位,误以为前面水域宽阔
Similar stranding hotspots occur elsewhere and seem to have something in common – gently sloping sandy beaches that can reflect echolocation clicks away from the animal that produced them. With no echoes returning from the beach, you could be forgiven for thinking that the area ahead of you is open water.
Data has since revealed that all mass strandings around Australia occur on gently sloping sandy beaches, some with inclines of less than 0.5%
5. 为什么这么多鲸鱼同时搁浅?因为它们不会丢下任何一个同伴,所以一鲸搁浅,都陷入危险
Tragically, mass stranded pilot whales may fall victim to one of their greatest assets – strong familial ties and social bonds. When one of them gets into trouble, others stick around in an effort to stay together. Whether sick, dying or simply confused, one animal getting lost in the shallows may lead many others into danger.
https://lens.monash.edu/@science ... s-crash-land-ashore |
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