Pelvic and sacral size dimorphism and allometry in two predatory carnivores with different life histories and locomotory adaptations

Abstract

Sexual size dimorphism (SSD) of the wolf and the lynx was evaluated for 15 pelvic and sacral variables in 48 specimens from the Western Carpathians. Our data confirmed small male-biased SSD in the pelvic and sacral bones for both species. We suggest that this can be explained by the need for a compromise between requirements for locomotion and giving birth. We also confirmed that significant differences exist between the species in the size of the pelvic and sacral bones. We discuss our findings in light of the species' different life histories.

Sexual dimorphism on the sacrum of the dog: A morphometric study

“…Although not directly, it would contribute to the importance of size differences in sex estimation based on sacrum morphometry. Sexual size difference occurs in the sacrum because it is simultaneously affected by all functional pressures on the pelvis (carrying weight, birth, and mode of locomotion) (Csanády et al, 2019). However, calculated indices in this study were not statistically significant for the size difference.…”

“…However, calculated indices in this study were not statistically significant for the size difference. Although the effect of birth activity on the dimorphism of sacrum size has been known (Csanády et al, 2019), it was concluded that the unknown birth activities of the female dogs included in the present study were effective in evaluating the effects on the indices. The direct effect of linear measurements can be observed.…”

“…Thus, it forms the dorsal boundary socalled "birth canal", which is bounded laterally by the ossa coxae (Bahadır and Yıldız, 2010). The sacrum, which is a dorsal component of the pelvis, is affected by all functional pressures on the pelvis (carrying weight, birth, and mode of locomotion) together with the pelvis from, and contributes to revealing the sexual size difference together with the pelvis (Csanády et al, 2019). In this study, the relationship between sacrum morphometry and sexual dimorphism was investigated in dog breeds with different typologies and sizes.…”

Quantitative and Qualitative Analysis of Sexual Dimorphism in Aditus Orbitae of Kacang Goat (Capra aegragus hircus)

“…The morphometrical and morphological techniques may be useful to determine quantitatively and quali-tatively the bone structures to establish the differences between sex. The pelvic and femur bones are the most accurate skeletal elements to use for assignment in determining sex in human, this is because the anatomy of reproductive function affects the development of pelvic bones (Miyakawa, et al, 2016;Csanády, et al, 2019;Ali, et al, 2020). Despite the congruence between the function of the pelvic and femur bone, the study preferred femur bone as the choice for sexual dimorphism research (Belhaoues, et al, 2016;Kanchan, et al, 2021).…”