| Packard, G. C., Packard, M. J., & Boardman, T. J. (1981). Patterns and possible significance of water exchange by flexible-shelled eggs of painted turtles (chrysemys picta). Physiological zoology, 54, 165–178. |
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| Packard, G. C., & Packard, M. J. (2003). Influence of acclimation and incubation medium on supercooling by hatchling painted turtles, chrysemys picta. Functional Ecology, 17(5), 611–618. |
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| Added by: Admin 14 Aug 2008 20:36:26 UTC |
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| Packard, M. J., Packard, G. C., & Boardman, T. J. (1982). Structure of eggshells and water relations of reptilian eggs. Herpetologica, 38, 136–155. |
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| Added by: Admin 24 Aug 2008 19:37:47 UTC |
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| Packard, G. C., Packard, M. J., & Boardman, T. J. (1984). Effects of the hydric environment on metabolism of embryonic snapping turtles do not result from altered patterns of sexual differentiation. Copeia, 1984, 547–550. |
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| Added by: Admin 24 Aug 2008 19:37:47 UTC |
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| Packard, M. J., Short, T. M., Packard, G. C., & Gorell, T. A. (1984). Sources of calcium for embryonic development in eggs of the snapping turtle chelydra serpentina. Journal of Experimental Zoology, 230, 81–87. |
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| Packard, G. C. (1999). Water relations of chelonian eggs and embryos: is wetter better? American Zoologist, 39, 289–303. |
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| Added by: Admin 17 Aug 2008 18:17:24 UTC |
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| Packard, M. J., & Packard, G. C. (1986). Effect of water balance on growth and calcium mobilization of embryonic painted turtles (chrysemys picta). Physiological zoology, 59, 398–405. |
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| Packard, G. C., & Packard, M. J. (2000). Developmental plasticity in painted turtles, chrysemys picta. Functional Ecology, 14(4), 474. |
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| Added by: Admin 17 Aug 2008 18:54:55 UTC |
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| Packard, G. C., & Packard, M. J. (2001). The overwintering strategy of hatchling painted turtles, or how to survive in the cold without freezing. Bioscience, 51(3), 199–207. |
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| Added by: Admin 17 Aug 2008 18:54:55 UTC |
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| Packard, G. C., & Packard, M. J. (1988). Water relations of embryonic snapping turtles (chelydra serpentina) exposed to wet or dry environments at different times in incubation. Physiological zoology, 61, 95–106. |
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| Added by: Sarina Wunderlich 13 Oct 2008 21:33:01 UTC |
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| Packard, G. C., & Packard, M. J. (1993). Sources of variation in laboratory measurements of water relations of reptilian eggs and embryos. Physiological zoology, 66 (1), 115–127. |
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| Added by: Sarina Wunderlich 23 Aug 2008 14:56:32 UTC |
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| Packard, M. J., & Packard, G. C. , Size and fitness in hatchling turtles. Paper presented at 1st World Congr. Herpetol. Canterbury. |
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| Added by: Sarina Wunderlich 13 Oct 2008 21:33:02 UTC |
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| Packard, G. C. (1991). Physiological and ecological importance of water to embryos of oviparous reptiles. In D. C. Deeming & M. W. J. Ferguson (Eds.), Egg incubation Cambridge (Cambridge University Press). |
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| Added by: Sarina Wunderlich 13 Oct 2008 21:33:02 UTC |
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| Packard, G. C., Packard, M. J., & Morjan, C. L. (2002). Cold-tolerance of hatchling painted turtles (chrysemys picta bellii) from the southern limit of distribution. Journal of Herpetology, 36(2), 300–304. |
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| Added by: Admin 14 Aug 2008 20:35:31 UTC |
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| Packard, G. C., Taigen, T. L., Packard, M. J., & Boardman, T. J. (1981). Changes in mass of eggs of softshell turtles (trionyx spiniferus) incubated under hydric conditions simulating those of natural nests. Journal of Zoology, London, 193, 81–90. |
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| Last edited by: Beate Pfau 16 Aug 2009 07:51:45 UTC |
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| Packard, G. C., & Packard, M. J. (1997). Type of soil affects survival by overwintering hatchlings of the painted turtle. Journal of Thermal Biology, 22, 53–58. |
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| Added by: Admin 14 Aug 2008 22:46:52 UTC |
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| Packard, G. C., Packard, M. J., Boardman, T. J., Morris, K. A., & Shuman, R. D. (1983). Influence of water exchanges by flexible-shelled eggs of painted turtles chrysemys picta on metabolism and growth of embryos. Physiological zoology, 56, 217–230. |
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| Added by: Admin 24 Aug 2008 19:37:47 UTC |
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| Packard, G. C. (1997). Temperature during winter in nests with hatchling painted turtles (chrysemys picta). Herpetologica, 53, 89–95. |
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| Added by: Admin 17 Aug 2008 17:23:56 UTC |
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| Packard, G. C., Packard, M. J., & Boardman, T. J. (1984). Influence of hydration of the environment on the pattern of nitrogen excretion by embryonic snapping turtles (chelydra serpentina). Journal of Experimental Biology, 108, 195–204. |
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| Added by: Admin 24 Aug 2008 19:37:48 UTC |
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| Packard, G. C., Packard, M. J., & Gutzke, W. H. N. (1985). Influence of hydration of the environment on eggs and embryos of the terrestrial turtle terrapene ornata. Physiological zoology, 58, 564–575. |
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| Added by: Admin 24 Aug 2008 19:37:48 UTC |
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