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