The by-catch situation in German brown shrimp (Crangon crangonL.) fisheries with particular reference to plaice (Pleuronectes platessaL.)

Abstract

Summary Since 1928 and over the history of German fishing for brown shrimp (Crangon crangon L.), several investigations have been made examining the by‐catch of this small‐meshed fishery. By‐catch of commercially valuable fish, particularly flatfish species, has always been a matter of concern. The amount of by‐catch comprising fish and invertebrates may actually be high, but figures discussed in public are biased by including discarded undersized shrimp, the target species, and dead material. Many changes in the equipment and practices of the fishery have occurred through the decades. As a result, the overall balance between consumption shrimp, by‐catch and undersized shrimp has changed in a positive sense. Those fish still taken as by‐catch despite the use of more selective trawls are often discarded and no longer landed for reduction purposes, leaving a chance to survive. Their species spectrum is largely stable over time. In this paper, detailed considerations are made in the particular case of North Sea plaice (Pleuronectes platessa L.), which are abundant in the by‐catch and is a commercially important species. Any large numbers discarded must be regarded in the light of high numbers of offspring, the large discards of the flatfish fishery and the high natural mortality of juvenile plaice. From that the conclusion is drawn, that the German shrimp fishery meets criteria of sustainability in respect to the target species and by‐catch situation.

Predictive framework for codend size selection of brown shrimp (Crangon crangon) in the North Sea beam-trawl fishery

“…The brown shrimp ( Crangon crangon ) fishery is socio-economically one of the most important fisheries in the North Sea [ 1 , 2 ]. It supports an international fleet of approximately 560 vessels [ 3 ], employing more than 1,000 fishermen, and producing yearly revenues of up to ~€100 million [ 4 ].…”

“…However, in recent years, brown shrimp producer organisations have initiated a certification process of the fishery by the Marine Stewardship Council. A key finding for successful certification was the need to investigate gear technology on codend selectivity, which should improve the exploitation patterns of brown shrimp [ 1 , 4 ].…”

In Silico Prediction of Cross-Reactive Epitopes of Tropomyosin from Shrimp and Other Arthropods Involved in Allergy

“…For shellfish, black tiger shrimp and giant freshwater prawn were chosen because they are the main cultured species with economic importance, accounting for more than 9% of the crustacean market [32]. Brown shrimp was included based on its natural habitat in the environment with its socioeconomic importance for the fishery economy in the North Sea [33]. For arthropods, the American house dust mite was selected since this kind of mite is a widely distributed species that provides the major source of house dust mite tropomyosin allergen [34]; American and German cockroaches were used since they are ubiquitous, difficult to control, predominant, and often correlated with allergy and asthma [35].…”

Beschrijving garnalenvisserij : Huidige situatie, knelpunten en kansen

“…Er zijn diverse onderzoeken gedaan naar het effect van garnalenvisserij op visbestanden in de Noordzee. Neudecker & Damm (2010) concludeerden dat de ongewenste bijvangst van schol van leeftijd 0 in de garnalenvisserij is afgenomen door aangepaste visserijmethoden, en dat de ongewenste bijvangst van schol in de (Duitse) garnalenvisserij geen merkbaar effect heeft gehad op het Noordzeescholbestand. Het is niet duidelijk in welke mate de ongewenste bijvangst van vis in de garnalenvisserij de bestanden van commerciële soorten zoals kabeljauw, wijting en platvis beïnvloedt.…”