Social facilitation in green turtle siblings

摘要: Abstract 1. Tests made at the green turtle nesting ground Tortuguero, Costa Rica, show that turtles hatching singly have reduced prospects of emerging from nest, and even less chance reaching sea. 2. Observations through glass nest sides, young going to sea, group facilitation, probably involving both mechanical psychological factors, occurs. 3. Data tests Ascension Island, extending Hendrickson's results (1958) in China Sea, indicate metabolic heating raises temperature nests developing eggs suggests this may constitute thermal co-operation affecting fitness sets as evolutionary units.