鲨鱼蛋
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Highly
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Re: 鲨鱼蛋
是说这个？
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Highly
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Highly 的博客 - 帖子： 2270
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- 昵称（选填）： 高妹
Re: 鲨鱼蛋
地下趴着的那只是不是死了？鲨鱼一般不会趴在底下不动吧？
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pinfish
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Re: 鲨鱼蛋
看品种
能趴住的品种也有不少
鲨鱼的近亲各种ray那还有专业趴沙的
https://www.britannica.com/story/do-sha ... p-swimming
If you look at the nurse shark and the tiger shark, this belief is already proven false: these, and a few other shark species, can stop swimming whenever they want. They breathe by way of buccal pumping, actively “inhaling” water by using cheek muscles to draw it into the mouth and over the gills. This allows sharks to stop moving but continue breathing. They can rest on the ocean floor without worry and can even partially bury themselves in the sand, using respiratory openings behind the eyes, called spiracles, to pull water through their gills when their mouths are covered.
But some shark species don’t have the luxury of buccal pumping. For example, the great white shark, the whale shark, and the mako shark don’t have buccal muscles at all. Instead, these sharks rely on obligate ram ventilation, a way of breathing that requires sharks to swim with their mouths open. The faster they swim, the more water is pushed through their gills. If they stop swimming, they stop receiving oxygen. They move or die.
能趴住的品种也有不少
鲨鱼的近亲各种ray那还有专业趴沙的
https://www.britannica.com/story/do-sha ... p-swimming
If you look at the nurse shark and the tiger shark, this belief is already proven false: these, and a few other shark species, can stop swimming whenever they want. They breathe by way of buccal pumping, actively “inhaling” water by using cheek muscles to draw it into the mouth and over the gills. This allows sharks to stop moving but continue breathing. They can rest on the ocean floor without worry and can even partially bury themselves in the sand, using respiratory openings behind the eyes, called spiracles, to pull water through their gills when their mouths are covered.
But some shark species don’t have the luxury of buccal pumping. For example, the great white shark, the whale shark, and the mako shark don’t have buccal muscles at all. Instead, these sharks rely on obligate ram ventilation, a way of breathing that requires sharks to swim with their mouths open. The faster they swim, the more water is pushed through their gills. If they stop swimming, they stop receiving oxygen. They move or die.