The impacts of artificial light on marine turtles

Limpus C. & Kamrowski R.L. (2013) Ocean-finding in marine turtles: the importance of low horizon elevation as an orientation cue. Behaviour 150, 863-893.

Aim: 
To document the importance of horizon cues for ocean-finding in hatchlings under natural field conditions.
Type of Study: 
Natural and manipulative experiment
Key Results: 
1. Hatchlings move towards the horizon line at the lowest angle of elevation. 2. Hatchings move away form high silhouettes, in a direction that remains close to the horizon line at the lowest angle of elevation3. where a conflict exists regarding the direction of the lowest horizon elevation, hatchlings move towards the brightest lowest horizon
Response: 
Recommended manipulating the beach profile at beaches with sea finding problems. Ensure the direction of the ocean matches the lowest angle of elevation. Use this in combination with light reduction strategies to prevent disrupted orientation.
Reviewer: 
Kellie Pendoely
Ecosystem: 
Mon Repos Beach , Queensland, Australia
Full Reference: 
Limpus C. & Kamrowski R.L. (2013) Ocean-finding in marine turtles: the importance of low horizon elevation as an orientation cue. Behaviour 150, 863-893.