Time series dataset of depth and activity recorded by miniPAT (Wildlife computers) popup satellite archival tags deployed on Kerguelen sandpaper skates (Bathyraja irrasa, n=24) caught in the Patagonian toothfish longline fishery in Heard Island and McDonald Islands. Tags were deployed to assess the post-release survival of skates in the fishery.

This dataset contains stable isotope and tracking data from adult female Antarctic fur seal collected at three breeding colonies across the Southern Ocean: • Marion Island (2008–2018) • Bird Island, South Georgia (2008–2012) • Cape Shirreff, South Shetland Islands (2008–2012) The dataset includes: • Stable isotope data from whole blood and whiskers • Compound-specific amino acid isotope data (δ¹⁵NAA) from whole blood • GLS-derived tracking and environmental data Samples were collected from adult female seals captured between February and April prior to winter migration. Whole blood samples provide dietary information integrated over approximately 2–3 months, while sequential whisker sections provide longer-term isotopic records spanning multiple years. Bulk stable isotope values (δ¹³C and δ¹⁵N) and compound-specific isotope analysis of amino acids (CSIA-AA) provide information on trophic ecology and foraging habitat across multiple temporal scales, from recent feeding behaviour to multi-year dietary histories recorded in whiskers. The dataset also includes light-based geolocation (GLS) tracking data from adult females equipped with geolocator loggers during the inter-breeding migration period. Tracking variables include timestamps (GMT), estimated geographic positions (latitude and longitude), uncertainty metrics, and associated environmental variables such as sea surface temperature (SST) and absolute dynamic topography (ADT), where available.

This dataset contains physiological measurements collected from sand flathead (Platycephalus bassensis) to examine regional differences in thermal performance between Tasmania’s heavily fished southern population and the more lightly fished northern population. Fish were captured from both regions and acclimated for three weeks under common laboratory conditions before measurements were taken. The dataset includes standard metabolic rate (SMR), maximum metabolic rate (MMR), and aerobic scope (AS) recorded during acute thermal exposure at 12.5°C, 15°C, and 20°C using intermittent‑flow respirometry. To assess longer‑term thermal tolerance, critical thermal maximum (CTmax) was measured after a 14‑day acclimation to each test temperature. The purpose of the study was to determine whether populations with different histories of fishing pressure exhibit divergent thermal sensitivities and metabolic responses to warming. This information contributes to understanding how exploitation history may influence physiological resilience to climate change in coastal fisheries.