Stable isotope (C&N) and dietary fatty acid compositions (>1%) for marine mammals in the European Arctic

Dataset for paper "Niches of marine mammals in the European Arctic" in Ecological Indicators. Data include carbon and nitrogen stable isotope compositions for blue whales, fin whales, humpback whales, minke whales, white whales, walruses, bearded seals, ringed seals and polar bears, and dietary fatty acids compositions for blue whales, fin whales, humpback whales, minke whales, white whales, walruses and polar bears.