Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 21

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  konczyny miedniczne
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The aim of the morphological research was to attempt to characterize the peripheral part of the pelvis limb of domesticated ducks in relation to their age and sex. Research was conducted on the bone material of domestic Peking ducks (Anas platyrhynchos f. domestica Linnaeus 1758) derived from 84 8-week-old ducks (42 males and 40 females) and 40 ducks over eight weeks old (6 males and 34 females). All the birds were from a water-fowl farm. The bones were cooked in a 3% solution of sodium bicarbonate (NaHCO3), bleached with hydrogen peroxide (H2O2) and then dried at room temperature (16-20°C). The research concentrated on the bones of the peripheral part of the pelvis limb and, in particular, on a detailed morphological analysis of the bones of the left limb. Features typical of the species as well as changes concerning dimorphism and ontogeny were analysed. Statistically significant major differences were found between analogical bone parameters in adult males and females. No changes related to sexual dimorphism were observed in the cases of phalanx I greatest length (GL) and breadth of the proximal end (Bp), phalanx II of toe I and breadth of the proximal end (Bp), phalanx II of toe II and greatest length (GL), breadth of the proximal end (Bp), phalanx III of toe III and breadth of the proximal end (Bp). Dimorphic changes were also not found in phalanx I greatest length (GL), phalanx II greatest length (GL), phalanx III greatest length (GL), phalanx V of toe IV. No sexual dimorphism in relation to the tarsal-metatarsal bone was found among young ducks. In this group of birds statistically significant differences were found for phalanx III greatest length (GL), breadth of the proximal end (Bp), phalanx IV of toe III greatest length (GL), breadth of the proximal end (Bp). While analyzing the structure of toe IV, sexual dimorphism was found only in the case of phalanx IV and breadth of the proximal end (Bp).
The aim of the research was investigate the morphology of the limb girdle and free part of the pelvis limb of the ostrich as well as to establish the measurements of individual bones and determine dismorphic and ontogenetic differences. Studies were conducted on bone material derived from skeletons of fourteen-month-old ostriches (10 males and 10 females). After preparing the research material, absolute parameters of the examined bone structures were established separately for males and females. Analysis included a description of anatomical bone structures and osteometry. Measurements of the length and width of such bones as the pelvis, femur, tibia-tarsal, tarso-metarsal and phalanges III and IV were ascertained during the research process according to methods suggested by Driesch (16). Individual measurements were used for the fibula in order to define the greatest width of the proximal end (NSKB) as well as its optimal length (ND). A set of vernier calipers was used to determine the width and the length of the bone exact to 0,1 mm. Significant sexual dimorphism was observed in the group of studied birds. The variables showing statistically significant differences were: the greatest width of the proximal end of the femur (FBp), the greatest length of the pelvis (GL), the width of the ilium (CB), the width of antitrochanter (BA), the diameter of the acetabulum (DiA). Variables of phalanx III were P3ND1, P3NSKB1, P3NSKD1, P3ND2, P3NSKB2, P3NSKD3 and P3ND4 and all of the studied parameters of phalanx IV indicated statistically significant differences. Clear sexual dimorphism was also found on the basis of measurements of the length (ND) and width (NSKB) of the fibula. Male pelvic bones were significantly bigger than those of females
The aim of the morphological study was an attempt to define in a morphological context the shoulder girdle and epiphysis bones in the pelvic bone of the domestic Peking duck. The morphological study was performed on the bone material taken from skeletons of domestic Peking ducks (Anas platyrhynchos f. domestica, Linnaeus 1758) including 40 adult individuals (6 males and 34 females) and 84 young individuals (42 males, 42 females). After preparing the bones for the research the absolute parameters of the bones were estimated for both males and females separately taking into account different age groups. The analysis included osteometry and description of anatomic bone structures. There appeared to be statistically significant differences between similar bone parameters defined for adult male and female species. In the young bird group distinct sex dimorphism was observed only in the spinal length of the pelvis as well as in the greatest length and width of the fibula bone. There also appeared to be ontogenetic differences between young and adult ducks in the size of the bones examined. The adult male species were characterized by bigger bones of the pelvic limb part studied. Similar dependences were observed in the case of young species. However, dimorphic differences were more visible with adult species. The external surface carving becomes more distinct with the increase of the birds’ age.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.