Sea water drinking as a homeostatic response to dehydration in hatchling loggerhead turtles Caretta caretta |
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Affiliation: | 1. School of Biological Sciences, The University of QLD, Brisbane 4072, Australia;2. School of Biological Science, The University of Sydney, Sydney 2006, Australia;1. Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 211198, China;2. Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing 211198, China;3. Jiangsu Food and Pharmaceutical Science College, Huaian, Jiangsu 223003, China;4. Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China;5. Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan;6. Jiangxi Qingfeng Pharmaceutical Ltd, Ganzhou 341000, China |
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Abstract: | - 1.1. Hatching Caretta caretta may lose up to 12% of their initial hatched weight from water loss during emergence from the nest.
- 2.2. After subsequent osmotic and excretory water loss in sea water, hatchlings will drink sea water (166 μl 100 g−1 hr−1) and return to their initial weight within 10–15 days, without feeding.
- 3.3. There were no significant changes in plasma osmolarity or sodium levels over this period.
- 4.4. This osmoregulatory strategy is in marked contrast to that seen in the estuarine crocodile, Crocodylus porosus.
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