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C D Barel

Publications and source records attributed to C D Barel.

3 recordsLinked to original sources

Constructional constraint and its ecomorphological implications.

This paper analyses the role of constructional morphology in explaining the limitations on the interactions between an organism and those factors in its environment which are potentially relevant to its inclusive fitness. Constructional morphology deals with the relations between functionally relevant anatomical units (apparatuses or functional components) and thereby demonstrates what quantitative and qualitative constraints there are on combining units necessary for environmental interactions. It is argued that investigations on the relations between form and environment (ecological morphology) should (1) consider three types of relations: form-form, form-function and function-environment factor, (2) include behavioral and physiological ecology and (3) not be limited to a particular stage, but include as much of ontogeny as possible.

Anatomy, Comparative↗

[Kinematic transmission-coefficient and the four-bar-system as a function-parameter and a form model for the mandibular depression-apparatus in Teleostei (author's transl)].

Through chains of ligaments and bones, which can be reduced to four-bar-systems (fbs), contraction of the sternohyoid and of the opercular levator muscle result in mandibular depression. Comparatively the opercular fbs transmits movement more efficiently than the hyoid fbs which, consequently, transmits force more efficiently.

Animals↗