Variability of leg kinematics in free-walking crayfish, Procambarus clarkii, and related inter-joint coordination

Variability of leg kinematics in free-walking crayfish, Procambarus clarkii, and related inter-joint coordination

The inter-joint coordination in leg 4 of the crayfish Procambarus clarkii was investigated while they travelled freely along straight paths. Video analysis of the kinematics of the leg's three-dimensional motion, combined with a statistical method based on conjugate cross-correlation functions, showed stable inter-joint coordination in the leg kinematics. In particular, the inter-joint coordina...

Spermiogenesis in the Crayfish (procambarus Clarkii)

The sperm of the crayfish, Procambarus clarkii, is relatively simple among decapod sperm and was described in the first paper of this series (28). The present paper details the development of this sperm as followed with the light and electron microscopes. The process is divided into six stages for purposes of description. The main points of interest discussed are the absence of mitochondria or ...

Kinematics of rotation in place during defense turning in the crayfish Procambarus clarkii.

The kinematic patterns of defense turning behavior in freely behaving specimens of the crayfish Procambarus clarkii were investigated with the aid of a video-analysis system. Movements of the body and all pereiopods, except the chelipeds, were analyzed. Because this behavior approximates to a rotation in place, this analysis extends previous studies on straight and curve walking in crustaceans....

Red Swamp Crayfish (procambarus Clarkii) in River Nile, Egypt

Crayfish (Procambarus clarkii) Effects on Lentic Lake Water Quality

.......................................................................................................................................... 3 Acknowledgements ......................................................................................................................... 4