It can hardly be otherwise – and cheer for the fish. A plaice, for example, there is a lot of effort, with the movement of the network to keep up, and in order to do exactly the Wrong thing. A special Opening at the bottom of the network offers her the Chance to Slip away. But it was only after anxious seconds, the platform can fish in the Baltic sea, to freedom. The cod, however, noise on the emergency exit and end up almost all in the cod-end. From this catch bag at the end of the trawl, there is virtually no Escape.
The maritime Drama on one of the numerous film clips to observe, the researcher of the Thünen-Institute for Baltic sea fisheries in Rostock. Are you looking for new fishing methods, which allow for the selective catch of a species, while undesirable fish can escape from the net. And this separation is achieved with Cod and bottom-dwelling flat fish, obviously: the Latter escaped mostly by the so-called FLEX-Beam, a “are raised in big tanks-Excluder”, in the Central part of the trawl that is held in place by plastic floats and a fiberglass rod in the open. More than eighty percent of the bycatch of flatfish, such as plaice or flounder, let in the cod fisheries decrease, says Institute Director Christopher Zimmermann. The show is still a further blessing effect: Young, small cod to escape through a suitable mesh width of the net from the codend. However, often this of flatfish literally tape will adorns what young cod the way out blocked. Therefore, the incidental catch of sinking in a FLEX-grid undersized Cod in order to around seventy percent, says Zimmermann. Two advantages of so, which can be reached without great effort, because existing networks can be cost-effectively converted.
Only a few animals survive the long hours of Entrainment in the network
in Rostock developed the escape opening is just one of many Tricks in order to avoid unwanted by-catch with the help of the fishing technique. “The Potential for a more selective fishing is still huge,” says carpenter. In the long history of motorized trawl fisheries, the incentive was missing but so far. Was fished, what went into the net. And what could not make use of the fishing, just landed back in the sea. The fate of the animals was sealed, however, The few specimens that the often long hours of Entrainment in the network, to Obtain the sorting on Deck, to survive, to die soon afterwards of their injuries. Seemingly unspoilt fishing is not better, because the finest of scratches on the skin to fatal fungal infections.
fails, what is the percentage of by-catch varies depending on the wanted type. Schooling fish such as herring or mackerel is relatively targeted fishing while the shrimp produced fishing is often more than ninety percent of the Committee. How much by-catch in the world overboard, nobody knows, the estimates of the world food organization, ranging from 7 to 27 million tons, the Committee, in the contrast to around 85 million tons of sea-landed fish.
Until a few years ago a Express landing ban: Even high-quality food fish, for the fishermen had no fishing quota or their quota was already exhausted, was considered as by-catch in the waters of the European Union had to be disposed of at sea. In this way, the catch should be made of protected species outside of the quota for the fishermen unattractive, but hardly the desired effect.
The fishermen are on the new scheme, not at all pleased
instead of a pure landing rate-realistic rates were actually prisoners, and the death of the animals used, which was also in Brussels for some time aware of. And so it came to 2013 in a new edition of the Common fisheries policy (CFP) to a paradigm shift: From 2015 on, was from the old landing prohibition for bycatch in a stepwise manner, a landing obligation which shall apply from the first of January 2019 now in all waters of the European Union.