Ukrainian Journal of Veterinary Sciences (Jun 2020)
MORPHO-METRIC DESCRIPTION OF THE PELVIC BONE AND PROXIMAL FEMUR EPYPHISIS OF STORKFORMES
Abstract
The pelvic bone and the proximal epyphisis of the femur bone are the main supporting components of the hip joint, and this is the leading link of the free pelvic limb ,which gives it considerable mobility, determines its position in static and locomotion .In the evolution process, these components acquire the value of a kind of central shock absorber against shocks, which gets the mowing limb .On the basis of comparative anatomical analysis, the pecularities of skeletal elements of the pelvic bone and the proximal femoral epyphisis of some storks are presented, as the main elements of the pelvic limb as a whole. It was determined, that ghe morpho-metric features of the skeletal elements of the studied birds caused by specific bipedalism, which is based of position of the axis of the body relatively to the pelvic limbs and maintain the body between two limbs. It was determined that the investigated structural elements are differ in shape and size. Also, it was determined, that among the investigated storcks the shortest femur in relation to the total length of the limb of the white heron is 12.1 ± 0.2. The longest femur relatively to the total length of the limb of the mower is 35.3 ± 0.5. These indicates that the short femur is characteristic for birds that are maximally adapted to water locomotion and most likely it is caused by the need go press the pelvic limb tighthly to the trunk in the thigh area in the process of swimming. The longer femur provides more distal fixation points for the deep femur, cranial iliac and caudal muscles while increasing their flexural and extensory function with respect to the thigh. Among the studied Ciconiiformes, the index of the smallest pelvic length to its width ranges from 31.2 to 68.0 %. This indacates that more wider is pelvis, more larger eggs can lay a female of this species
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