Authors:
Isabel Schmalenbach, Folke Mehrtensa, Michael Jankea and Friedrich Buchholz
Abstract:
From 2000 to 2005 about 5400 one-year-old hatchery-reared lobsters (Homarus gammarus) were tagged and released at the rocky island of Helgoland, North Sea. To date, 1–8% of the different release cohorts were recaptured in the field and 8–19% of these lobsters were recaptured from the semi-open area of the outer harbour. The recaptured lobsters indicated good development and growth conditions. The smallest berried females caught were 83 mm carapace length and 4 years old. The proportion of cultured lobsters to all measured lobsters captured around the island was 3–8% in the years 2007–2009. The population size of two cohorts was assessed using the Lincoln–Peterson method and the estimated survival rate averaged 30% and 40%. Minimum landing size of cultured lobsters was reached after 4–7 years. Cultured lobsters showed strong fidelity to their release sites, and thus remained around the island of Helgoland. A basis has been laid to enhance this endangered lobster population by means of a large scale restocking programme.
Source: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T6N-51JXFF8-1&_user=10&_coverDate=11%2F27%2F2010&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=e5ae6bba08e776952bcde0e1f7ed4220&searchtype=a
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