The Role of Sand Moisture in Shaping Loggerhead Sea Turtle (Caretta caretta) Neonate Growth in Southeast Florida

  • Published source details Erb V., Lolavar A. & Wyneken J. (2018) The Role of Sand Moisture in Shaping Loggerhead Sea Turtle (Caretta caretta) Neonate Growth in Southeast Florida. Chelonian Conservation and Biology, 17, 245-251.


This study is summarised as evidence for the following.

Action Category

Use irrigation systems

Action Link
Reptile Conservation
  1. Use irrigation systems

    A replicated, controlled, paired study (year not given) on a sandy beach in Florida, USA (Erb et al. 2018) found that watering loggerhead turtle Caretta caretta nests lead to larger hatchlings that grew more in captivity over 10 weeks in one of three measures compared to hatchlings from un-watered nests. Hatchlings from watered nests had higher mass (watered: 17 g; un-watered: 16 g), straight carapace length (watered: 42 mm; un-watered: 40 mm) and straight carapace width (watered: 33 mm; un-watered: 32 mm) compared to those from un-watered nests. Growth in straight carapace width over 10 weeks was higher for hatchlings from watered compared to un-watered nests (watered: 65 mm; un-watered 62 mm after 10 weeks), though there was no significant difference in growth in mass (watered: 89 mm; not watered: 79 mm after 10 weeks) and straight carapace length (watered: 76 mm; not watered: 72 mm after 10 weeks). In one nesting season, eggs from 10 nests were divided in half and reburied 1 m apart (10 pairs of nests, buried 60 cm deep). One received 45 minutes of daily watering, while the other received no additional watering. Hatchlings (67 from watered, 55 from un-watered nests) were transferred to tanks supplied with fresh seawater, and measurements of mass, straight carapace length and width were taken weekly for 10 weeks.

    (Summarised by: William Morgan)

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 21

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust