European lobsters (Homarus gammarus) captured around the rocky island of Helgoland (German Bight, North Sea) from 2005 to 2015 - A mark-recapture program - ...

• Main Authors: Schmalenbach, Isabel, Janke, Michael
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2015
• Subjects: Macrobenthic long-term series in the German Bight LTER_Benthos; Helgoland; Rocky Island; Homarus gammarus
• Online Access: https://dx.doi.org/10.1594/pangaea.855396; https://doi.pangaea.de/10.1594/PANGAEA.855396

European lobsters were captured by employees of the Marine Biological Station and local fishermen from the rocky subtidal zone around the island of Helgoland (North Sea, 54°11.3'N, 7°54.0'E) and from the Helgoland Deep Trench, located south west of the island. The animals were captured by pots, traps, trawl and divers. All measured lobsters were tagged and released. A tagged lobster was classified by the absence or presence of colour tag and/or T-bar tag. Data of lobsters contains capture date, fresh weight, carapace lengths, sex and the information if lobsters were egg-bearing and tagged. Furthermore, data of commercial landed lobsters are included. ... : T-Bar, Hallprint Pty. Ltd.: The T-bar anchor tags are inserted with a tagging gun (needle length: 2 cm) dorsally between the cephalothorax and the first abdominal segments at the right or left side. Used for lobsters >30 cm in total length. Colour Tag, Northwest Marine Technology Inc.: The elastomer tag (liquid at 0°C) are injected with a needle ventrally along the pleon under one or more intersegmental membranes. The tags fluoresce under UV Light and remain visible about five or more years. Used for lobsters >3 cm in total length. ...