Age determination in turtles: Evidence of annual deposition of scute rings

1992. Beyond captive breeding: the western swamp tortoise Pseudemydura umbrinarecovery programme. Int il)Q . Yb. 31 :37-41. LAPID, R., AND RosINZoN, B. 1997. Shell deformations in hatchling tortoises (Testudo graeca): results from X-ray radiography of mothers during pregnancy. Abstract, 3rd World Congress of Herpetology, Prague, pp. 122-123. LoYEZ, M. 1906. Recherches sur le developpement ovarien des oeufs meroblastiques a vitellus nutritif abondant. Arch. Anat. Microscop. Morph. Exp. 8:69-398. PENNINCK, D.G., STEWART, J.S., PAUL-MURPHY , J., AND PION, P. 1991. Ultrasonography of the Californian desert tortoise (Xerobates agassizi): anatomy and application. Vet. Radio!. 32: 112-116. PwTKJN, P.T., RoSTAL, D.C., BYLES, R.A., AND OwENs, D.W. 1997. Reproductive and developmental synchrony in femaleLepidnchelys olivacea. J. Herpetol. 31:17-22. RosTAL, D.C., RosEcK, T.R., OWEN, D.W., AND KRAEMER, D.C. 1990. Ultrasound imaging of ovaries and eggs in Kemp's ridley sea turtles (Lepidochelys kempi). J. Zoo. Wild!. Med. 21:27-35. RosTAL,D.C.,LAN CE, V.A.,GRUMBLES,J.S.,ANDALBERTs,A.C.1994. Seasonalreproductivecyclesofthedeserttortoise(Gophernsagassizil) in the eastern Mojave Desert. Herpetol. Monogr. 8:72-82. RosTAL, D.C., PALADINO, F.V., PATTERSON, R.M., AND SPOTILA, J.R. 1996. Reproductive physiology of nesting leatherback turtles (Dermochelys coriacea) at Las Baulas National Park, Costa Rica. Chelon. Conserv. Biol. 2:230-236. W ALDEYER, W . 1870. Eierstock und Ei. Leipzig: Wilhelm Engelmann, 174 pp. WEBB, G.J.W. 1997. Sustainable use of wildlife. Aust. Biologist 10:3-11.