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If bony fish were active enough why need of operculum?
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username2889812
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#1
I mean they move a lot right? So ventilation could be similar to cartilaginous fish?
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idk01
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#2
They aren't usually required but without them, they wouldn't be able to breathe when not moving (they do sometimes stop swimming)
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#3
(Original post by idk01)
They aren't usually required but without them, they wouldn't be able to breathe when not moving (they do sometimes stop swimming)
They aren't usually required but without them, they wouldn't be able to breathe when not moving (they do sometimes stop swimming)
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_.angelica._
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#4
Ram ventilation has leads to less efficient gaseous exchange. Bony fish use the operculum in conjunction with the ‘countercurrent flow’ method where the water with a high oxygen concentration flows next to blood with a relatively low concentration, so there is a net movement of oxygen into the blood.
Also ram ventilation is a fairly older method of ventilation and bony fish have evolved to adopt this method instead, so by evolutionary terms the whole gill operculum thing seems to be much better.
Also ram ventilation is a fairly older method of ventilation and bony fish have evolved to adopt this method instead, so by evolutionary terms the whole gill operculum thing seems to be much better.
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#5
(Original post by _.angelica._)
Ram ventilation has leads to less efficient gaseous exchange. Bony fish use the operculum in conjunction with the ‘countercurrent flow’ method where the water with a high oxygen concentration flows next to blood with a relatively low concentration, so there is a net movement of oxygen into the blood.
Also ram ventilation is a fairly older method of ventilation and bony fish have evolved to adopt this method instead, so by evolutionary terms the whole gill operculum thing seems to be much better.
Ram ventilation has leads to less efficient gaseous exchange. Bony fish use the operculum in conjunction with the ‘countercurrent flow’ method where the water with a high oxygen concentration flows next to blood with a relatively low concentration, so there is a net movement of oxygen into the blood.
Also ram ventilation is a fairly older method of ventilation and bony fish have evolved to adopt this method instead, so by evolutionary terms the whole gill operculum thing seems to be much better.
So I take it cartilaginous fish still live by ram ventilation?
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_.angelica._
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