Implications of nest relocation for morphology and locomotor performance of green turtle (Chelonia mydas) hatchlings
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Marine Science Program
Red Sea Research Center (RSRC)
Red Sea Research Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
Reef Ecology Lab
Permanent link to this recordhttp://hdl.handle.net/10754/668274
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AbstractSea turtle scute abnormalities are observed in higher proportion in hatchlings compared to adults, suggesting that hatchlings with a non-modal scute pattern (NMSP) have a lower chance of surviving to adulthood. In this study, we collected 732 newly emerged hatchlings from Redang Island, Malaysia, and compared their scute classification, size, and mass to fitness correlates (self-righting ability, crawling speed, and swimming speed). We investigated the proportion of hatchlings from each nest with NMSP to determine if there was a correlation with incubation duration or clutch relocation. We found relocated clutches at Chagar Hutang Turtle Sanctuary had a significantly shorter incubation duration with a higher proportion of NMSP compared to in situ clutches. Hatchlings’ mass were significantly heavier from in situ clutches compared to relocated clutches, although there were no significant differences of hatchling speed based on scute classification or clutch type. The difference of hatchling mass between in situ and relocated clutches could affect predation and mortality rates on recently emerged hatchlings. These findings have important conservation implications, suggesting that relocation should only be implemented on clutches with a high potential to be disrupted or with a low chance of survival if left in situ. Our findings highlight the need for a standard procedure when clutch relocation is used as a conservation strategy. Relocation should replicate natural nest dimensions by duplicating both nest width and depth, and clutches should be relocated to similar shade conditions as the natural nest.
CitationTanabe, L. K., Steenacker, M., Rusli, M. U., & Berumen, M. L. (2021). Implications of nest relocation for morphology and locomotor performance of green turtle (Chelonia mydas) hatchlings. Ocean & Coastal Management, 207, 105591. doi:10.1016/j.ocecoaman.2021.105591
SponsorsWe extend our thanks to the interns, volunteers, and rangers at Chagar Hutang Turtle Sanctuary for their assistance with fieldwork. The Sea Turtle Research Unit (SEATRU) kindly hosted LKT at the research station during the study. This work was supported by the King Abdullah University of Science and Technology (KAUST) through KAUST's Red Sea Research Center (baseline funding to MLB and a travel grant to LKT).
JournalOcean & Coastal Management
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