Ultrasound examination and behavior scoring of captive broadnose sevengill sharks, Notorynchus cepedianus (Peron, 1807)
Abstract 10.1002/zoo.20155.abs Serial ultrasound examination of four mature female sevengill sharks (Notorynchus cepedianus) was carried out over 18 months. Monitoring the reproductive cycle and development of follicles and fetuses in sharks in a noninvasive manner using this technique has not been reported previously. Sharks were caught out of the “Oceanarium” tank by divers using a […]
Ultrasonography of the urogenital tract in elephants (Loxodonta africana and Elephas maximus): An important tool for assessing female reproductive function
Abstract 10.1002/1098-2361(2000)19:53.3.CO;2-B At present, the worldwide captive elephant population is not self-sustaining. The major reason for low reproductive rates is the heretofore undiagnosed reproductive disorders of nulliparous females of prime breeding age. Recent advances in ultrasound technology have facilitated the detection of these disorders in non-sedated animals. Approximately 2,000 ultrasonographic examinations were performed in more […]
Endocrine and ultrasound evaluation of a non-cycling African elephant: Identification of an ovarian follicular cyst
The reproductive rate of captive African elephants is low because of logistical difficulties associated with transporting animals for breeding, the danger of maintaining bulls and medical or physiological problems. There also is growing evidence that a significant number of mature female elephants are not experiencing normal estrous cycles. The case described in this report involves […]
Seasonal reproductive cycle of the Galápagos tortoise (Geochelone nigra) in captivity
Abstract 10.1002/(SICI)1098-2361(1998)17:63.3.CO;2-V The reproductive physiology of nine Galápagos tortoises (Geochelone nigra) was studied from February 1988 to May 1989. The study encompassed the annual reproductive cycle to include complete mating and nesting sequences. Male (n = 4) and female (n = 5) seasonal reproductive changes were determined throughout the study with endocrine analysis and ultrasonographic […]
A review of the reproductive physiology of rhinoceros species in captivity
Substantial progress in understanding the reproductive physiology of the four rhinoceros species in captivity, White rhinoceros Ceratotherium simum, Black rhinoceros Diceros bicornis, Indian or Greater one-horned rhinoceros Rhinoceros unicornis and Suma-tran rhinoceros Dicerorhinus sumatrensis, has been achieved over the last two decades largely owing to advances in endocrine and ultrasound techniques, and improved methods of […]
Observations on the female reproductive cycle of captive giant tortoises (Geochelone spp.) using ultrasound scanning
The reproductive activities of one adult female Galapagos tortoise (Geochelone nigra) and three adult female Aldabra trotoises (Geochelone gigantea) were monitored over 2 yrs using ultrasound scanning. A nonrestraining technique o tactile stimulation was used for all examinations. Developing, preovulatory, and atretic ovarian follicles, as well as eggs at various stages of shell deposition, were […]
Observation of reproductive cycle of female yellow-margined box turtle (Cuora flavomarginata) using radiography and ultrasonography
This study presents a combination of radiography and ultrasonography to observe the reproductive cycle of 24 captive female yellow-margined box turtles in Taiwan. Radiography was mainly used to monitor clutch size, whereas ultrasonography was applied to detect changes in the follicles throughout the year. The observation of the 24 female turtles was performed from April […]
Observations on the female reproductive cycles of captive Asian yellow pond turtles (Mauremys mutica) with radiography and ultrasonography
The annual reproductive cycle of 27 femaleMauremys muticawas observed by radiography and ultrasonography from April 2006 to August 2007. Radiography was used to monitor clutch size and ultrasonography was used to monitor changes in the ovarian follicles. The follicles started to enlarge in September and became preovulatory in January. The mean maximum follicle diameter of […]
Use of Ultrasonography and Contrast Radiography for Snake Gender Determination
The purpose of this paper is to characterize the sonographic and radiographic features of hemipenes in male snakes and to use these features for gender determination. The sonographic and radiographic examination of 17male and 10 female snakes, whose gender was determined previously by probing, were evaluated by one examiner who was unaware of the gender. […]
Sexual maturation in the sumatran rhinoceros (Dicerorhinus sumatrensis)
To help save the Sumatran rhino from extinction, the captive breeding program must capitalize on each rhino’s reproductive lifespan. Doing so requires knowing when calves are sexually mature. The goal of this study was to monitor physiological changes associated with sexual maturation in two captive born calves (one male and one female) to determine the […]