Steady as He Goes: At-Sea Movement of Adult Male Australian Sea Lions in a Dynamic Marine Environment

摘要: The southern coastline of Australia forms part the worlds' only northern boundary current system. Bonney Upwelling occurs every austral summer along south-eastern South Australian coastline, a region that hosts over 80% worlds population an endangered endemic otariid, sea lion. We present first data on movement characteristics and foraging behaviour adult male lions across their range. Synthesizing telemetric, oceanographic isotopic datasets collected from seven individuals enabled us to characterise individual approximate two year time period. Data suggested seasonal variability in stable carbon nitrogen isotopes could not be otherwise explained by changes animal patterns. Similarly, animals did change patterns despite fine-scale spatial temporal upwelling event. Individual males tended return same colony at which they were tagged utilized at-sea regions for irrespective conditions or year. Our study contrasts general assumptions otariid life history strategies should result greater dispersal, with displaying central place similar other species region.