Gross Anatomy of the Female Genital Organs of the Pampas Deer (Ozotoceros bezoarticus, Linnaeus 1758)

Abstract

To describe the macroscopic anatomy of the genital organs of the female pampas deer (Ozotoceros bezoarticus), organs from animals dead in a captive breeding station were dissected. A total of twenty females, 17 adults and 10 pre-puberal approximately 1 year old were studied by gross dissection. The ovaries of adult females without corpora lutea weighed 0.22±0.02 g on the right and 0.20±0.01 g on the left and accounted for 0.03±0.01% of body weight. All corpora lutea (n=6) were found in the right ovary, but in cases where there was no corpus luteum present, the right ovary tended to be heavier than the left (P=0.1). The absence of ovarian bursa, intercornual ligament and suburethral diverticle is peculiar to this deer species. Only 6 convex caruncles were found in the uterine horns, which differ from the more of 100 present in domestic ruminants. Four regular folds that were observed in the cervix of the uterus should not be an obstacle to the passage of a transcervical catheter, allowing intrauterine artificial insemination. The close relationship between the ovarian artery and vein stood up could be associated with the passage of the uterine luteolytic factor from the vein to the ovarian artery, avoiding its systemic way, as happens in domestic ruminants. While the plan of organization was similar, there are some differences with the descriptions of other ruminants. Our results may be very useful as it provides with information that may be considered for the development of female reproductive biotechnologies.

Arterial Thoracic Vascularization in Some Deer Species: Pampas Deer (Ozotoceros bezoarticus), Brown Brocket Deer (Mazama gouazoubira) and Axis Deer (Axis axis)

“…The most of anatomical studies related to these deer species have focused on the urogenital apparatus (Halder et al., ; Willard and Randel, ; Pérez et al., ,b) and lower digestive system (Pérez et al., ; Pérez and Ungerfeld, ; Pérez and Vazquez, ). The detailed anatomy of the vascular system has not reported in these deer species until now.…”

Asymmetrical size and functionality of the pampas deer (Ozotoceros bezoarticus) testes: Right testis is bigger but left testis is more efficient in spermatogenesis

“…As in other studies on pampas deer anatomy (Pérez et al., ,b), the first non‐invasive approach was the study of the organs from dead animals. The study was performed with 23 deceased males from the ECFA.…”

“…Semicaptive breeding of animals that came from the O. b. arerunguaensis population started in 1981 at the Estación de Cría de Fauna Autóctona (ECFA, 34°3′ S, 55°1′ W; altitude: ~200 m), Pan de Azúcar, Maldonado, Uruguay. Pérez, Vazquez, and Ungerfeld (,b) recently described the reproductive anatomy in pampas deer males and females. In this species, the right ovary was thicker and tended to be greater than the left one in adult females; moreover, all the females that had corpus luteum had them in the right ovary (Pérez et al., ,b).…”

“…Pérez, Vazquez, and Ungerfeld (,b) recently described the reproductive anatomy in pampas deer males and females. In this species, the right ovary was thicker and tended to be greater than the left one in adult females; moreover, all the females that had corpus luteum had them in the right ovary (Pérez et al., ,b). In agreement, the right testis was significantly heavier and had greater volume than the left one (Pérez et al., ,b b).…”

Arterial Vascularization and Morphological Characteristics of Adrenal Glands in the Pampas Deer (Ozotoceros bezoarticus, Linnaeus 1758)

“…Most of the anatomical studies related to Pampas deer have focused on the reproductive system (Pérez and Ungerfeld, ; Pérez et al., ,b) and lower digestive system (Pérez et al., ; Pérez and Ungerfeld, ). The detailed morphological aspects of the endocrine glands have not been reported in the Pampas deer until now.…”