Hidden gems? A multi-method approach to study the diet of harbour porpoises (Phocoena phocoena) in the southern North Sea - Hesse, Eileen; Boyi, Joy Ometere; Das, Krishna; Lehnert, Kristina; Piette, Mathilde; Pinzone, Marianna; Siebert, Ursula; Gilles, Anita (2023)