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Gullestad P.,The Norwegian Directorate of Fisheries | Blom G.,The Norwegian Directorate of Fisheries | Bakke G.,The Norwegian Directorate of Fisheries | Bogstad B.,Norwegian Institute of Marine Research
Marine Policy | Year: 2015

A source to long-term increased catches and profitability for the fishing fleet is the reduction of discards and improvements in exploitation patterns. This article details the development of Norwegian regulatory measures to this end, in particular the introduction of a discard ban and the Barents Sea programme of real-time closures of fishing areas. Actual benefits of this policy are outlined. © 2014 The Authors. Source


Skiftesvik A.B.,Norwegian Institute of Marine Research | Blom G.,The Norwegian Directorate of Fisheries | Agnalt A.-L.,Norwegian Institute of Marine Research | Durif C.M.F.,Norwegian Institute of Marine Research | And 9 more authors.
Marine Biology Research | Year: 2014

Several species of wrasse (Labridae) are used as cleaner fish to remove salmon lice from farmed Atlantic salmon. We estimated the fishery and use of wrasse in Hardangerfjord. The estimated numbers of labrids used on salmon and rainbow trout farms varied between 86,000 and 251,000 from 2002-2006, but increased to as much as 1.1 million in 2009 and 2010. A total of 93,500 kg (around 1.54 million) labrids were reported landed during 2000-2010. Corkwing wrasse (Symphodus melops) was by far the most important wrasse species: 52% by weight and 56% by number. Ballan wrasse (Labrus bergylta) made up 34% by weight but only 14% by number (due to its larger size). The relative proportion of species between the different sampling locations in the fjord was significantly different, as was the condition factor of some species. Goldsinny wrasse (Ctenolabrus rupestris) had the slowest growth of the labrids in this study, and did not reach the minimum commercial catch size (11 cm) before they were 4-5 years old. Very few goldsinny caught were over that size. Corkwing reach commercial size in 1-2 years. The results of this study indicate that wrasse should be protected during the spawning season. Species such as goldsinny grow so slowly that they will most likely be collected several times in heavily fished areas but discarded because they are smaller than the minimum allowable size. This could be avoided through the use of modified traps with escape routes for undersized fish. This study represents a first step towards establishing a knowledge-based management plan for the wrasse fishery. © 2014 The Author(s). Source

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