Abstract
1. 1. Fathead minnows (Pimephales promelas) alter buoyancy by changing swimbladder volume to compensate for changes in water velocity with the lowest buoyancy attained in faster water velocities. 2. 2. Extent of buoyancy adjustment is greater and rate of increase faster at 21 than at 4.5°C. 3. 3. Buoyancy is inversely related to water velocity. 4. 4. Compared to large fish, small fish make a lesser adjustment, have a higher internal pressure, and secrete gas faster during an increase in buoyancy. 5. 5. Gas secretion is used to increase swimbladder volume. 6. ]6. Changes in internal pressure occur during adjustment but do not influence the rate of adjustment.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call