Biomechanics of static roll posture control by body flexion in adult zebrafish.

ABSTRACT: Posture control is crucial for animals. Static posture control in fish remains poorly explored. Recent studies have shown that larval zebrafish perform body flexion during slight roll tilts: the body flexion displaces a gas-filled swim bladder, generating counter-rotation torque for postural recovery through the misalignment of gravity and buoyancy forces. Swim bladder deflation impairs this postural recovery, suggesting its critical role. This static posture control strategy may be utilized by many fish species. However, adult fish differ from larvae in morphology and behavior, raising questions about the generality of this mechanism. Our behavioral analysis showed that adult zebrafish also flexed their body during roll tilts, with flexion persisting until recovery to an upright posture.

SUBMITTER: Nagaoka R 

PROVIDER: S-EPMC12446337 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature