Prolactin Corticosterone Stress Biologging Arctic ACL Arctocephalus gazella Disease ecology Mitochondria Management Diving behaviour Migration Seabirds Distribution Marine predators InvaCost Biological invasion PFAS Tracking Behaviour Antarctica Blood Foraging behavior Reproduction Conservation Energy expenditure Rissa tridactyla Capture–mark–recapture Invasive species Breeding success Mirounga leonina Global change Behavioural ecology Energetics Depredation Southern Ocean Fitness Contaminants Mate choice Diving behavior Foraging ecology Salmo trutta Phenotypic plasticity Survival Poisson Sea trout Wandering albatross Svalbard Foraging behaviour Pygoscelis adeliae Personality Killer whales Antarctic Insect Sexual selection Biodiversity Diomedea exulans Ecophysiology Conservation biology Dispersal Thyroid hormones Animal migration Ecology Seabird Bio-logging Population dynamics Cold stress Ageing Southern Indian Ocean Movement ecology Fish Accelerometry Biological invasions Salmonidae Bioaccumulation GPS Foraging Fisheries Procellariiformes Black-legged kittiwake Stable isotopes Monetary impacts Functional traits Climate change Kerguelen Metabolomics Albatrosses Morphology Body condition Sea ice Metabolism Mercury Age Birds Salmonids Demography Southern elephant seal Oxidative stress Diet Abundance