Ultrasound imaging of reproductive organs and eggs in Galapagos tortoises, Geochelone elephantopus spp

Publication Type:
 Journal Article
Year of Publication:
 1990
Authors:
 Todd R. Robeck, David C. Rostal, Patrick M. Burchfield, David W. Owens, Duane C. Kraemer
Publication/Journal:
 Zoo Biology
Publisher:
 A Wiley Company, Inc., Wiley Subscription Services
Keywords:
 , ,
ISBN:
 1098-2361
Abstract:

Abstract 10.1002/zoo.1430090503.abs This study demonstrates the efficacy of using ultrasound to determine the presence of ovarian developing, preovulatory, and atretic follicular structures and oviductal eggs in the Galapagos tortoise, Geochelone elephantopus spp. Ultrasound was effective in locating both right and left ovarian structures in 92% (n = 100 ovaries) of the trials. Developing and preovulatory follicles and oviductal eggs were echogenically visualized and had measurements ranging from 18 to 44 mm (n = 93) and 55 to 68 mm (n = 9), respectively. Atretic follicles ranged in size from 10 to 38 mm (n = 10). In one trial with four G. elephantopus, ultrasound observations were validated with the use of laparoscopy. All procedures were accomplished without general anesthesia on a specifically designed restraining table. Ultrasound provides an effective, safe modality for determining the reproductive status of adult female tortoises.

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