Growth rate and projected age at sexual maturity for immature hawksbill turtles and green turtles foraging in the remote marine protected area of Aldabra Atoll, Seychelles

Cheryl L. Sanchez; Nancy Bunbury; Jeanne A. MortimerLuke A’BearMichael BettsRainer von BrandisApril J. BurtLorraine CookeJanske van de CrommenackerJock C. CurrieNaomi DoakFrauke Fleischer-DogleyEmma MedericBruno MelsPierre PistoriusHeather RichardsPaolo Casale

首页> 外文期刊>Marine Biology: International Journal on Life in Oceans and Coastal Waters >Growth rate and projected age at sexual maturity for immature hawksbill turtles and green turtles foraging in the remote marine protected area of Aldabra Atoll, Seychelles

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Growth rate and projected age at sexual maturity for immature hawksbill turtles and green turtles foraging in the remote marine protected area of Aldabra Atoll, Seychelles

机译：Growth rate and projected age at sexual maturity for immature hawksbill turtles and green turtles foraging in the remote marine protected area of Aldabra Atoll, Seychelles

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Abstract Changes in marine ecosystems from human stressors, and concerns over how species will respond to these changes have emphasized the importance of understanding and monitoring crucial demographic parameters for population models. Long-lived, migratory, marine vertebrates such as sea turtles are particularly vulnerable to changes. Life-history parameters like growth-in-body size can be largely influenced by environmental processes which can impact population growth. We analyzed a 40-year (1981–2021) capture-mark-recapture dataset from the protected UNESCO World Heritage Site, Aldabra Atoll, Seychelles, to estimate key population parameters, including body growth, for immature green turtles (Chelonia mydas) and hawksbill turtles (Eretmochelys imbricata). Curved carapace length (CCL) range was 34.3–110.9?cm (mean?±?SD: 51.0?±?11.4?cm, n?=?1191) for green turtles and 28.7–89.4?cm (47.7?±?14.4?cm, n?=?538) for hawksbill turtles. Recapture events, with an 11-month minimum period, revealed a mean annual growth rate of 3.2?±?1.5?cm?year?1 for green turtles (n?=?75) and 2.8?±?1.4?cm?year?1 for hawksbill turtles (n?=?110). Hawksbill turtles exhibited a non-monotonic growth rate while no significant growth-size relationship was detected for green turtles. Green turtle mean annual growth per 10-cm size class was highest in the larger size classes (50?69.9?cm). Hawksbill turtle growth rate was highest in the larger size classes (50?69.9?cm) then declined in the largest size class (70?79.9?cm). Green turtles and hawksbill turtles may spend?>?8 and 18?years, respectively, using Aldabra, Seychelles, as a foraging ground.

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《Marine Biology: International Journal on Life in Oceans and Coastal Waters》 |2023年第4期|1.1-1.16|共16页
作者
Cheryl L. Sanchez; Nancy Bunbury; Jeanne A. MortimerLuke A’BearMichael BettsRainer von BrandisApril J. BurtLorraine CookeJanske van de CrommenackerJock C. CurrieNaomi DoakFrauke Fleischer-DogleyEmma MedericBruno MelsPierre PistoriusHeather RichardsPaolo Casale;
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University of Pisa||Seychelles Islands Foundation;

Seychelles Islands Foundation||University of Exeter, Cornwall Campus;

Seychelles Islands Foundation||University of FloridaSeychelles Islands FoundationSeychelles Islands Foundation||Kirstenbosch National Botanical GardenSeychelles Islands Foundation||Nelson Mandela UniversityUniversity of Pisa;

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正文语种英语
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Capture-mark-recapture; Chelonia mydas; Eretmochelys imbricata; Western Indian Ocean; Developmental habitat;

Growth rate and projected age at sexual maturity for immature hawksbill turtles and green turtles foraging in the remote marine protected area of Aldabra Atoll, Seychelles

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