Peter G. Ryan

Airflows redefine the cost of aerial transport in the wild

Fuel economy matters to both animals and machines, as the cost of transport can determine where, when, and how far locomotion is possible. However, established estimates of these values for animal flight come from laboratories and treat the atmosphere as constant, even though fre...

Agonistic interactions and vocalizations among Procellariiformes in multi-species feeding aggregations, observed through bird-borne cameras

Abstract Marine predators frequently aggregate at food sources, where interactions can range from cooperative group hunting to interference competition for resources. To investigate interactions at feeding aggregations among procellariiforms, we equipped wandering albatrosses Dio...

Accumulation of stranded plastic objects and other artefacts at Inaccessible Island, central South Atlantic Ocean

During 1987 a survey of macro-artefacts (>10 mm diameter) was conducted along a 900 m boulder beach at the western point of Inaccessible Island, central South Atlantic Ocean. This repeated the survey made at the same site during 1984, when the highest density of artefacts at the...