Gillnet

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Fishing net glass ball as a float for the net; from the 1950s (still in original condition)

Net poles at the Barther Bodden

Gillnets are existing in the rule of a single piece of net from monofilament or braided nylon line fishing nets .

function

As with the driftnet , the fish is caught if it tries to swim through the net and its head gets stuck. In subsequent attempts to free himself, he then continues to get tangled up in the network.

The use of the gillnet is common in both inland and inshore fishing . The networks are differentiated according to the way they are set up. Pelagial nets are suspended from swimmers at the desired depth in open water . With bottom nets , the lower sink line is heavy enough to compensate for the buoyancy of the upper floating line. The net therefore sinks to the bottom of the water. Unlike drift nets, gillnets are firmly anchored at both ends if possible. In inland fishing, lengths around 30 m are common.

One advantage of gillnet fishing is the relatively simple maintenance of the device and the possibility of catching fish of a certain size or species through the mesh size and placement of the net. Since the sensitive slime layer of the fish is damaged when caught and the fish often get so tangled that they cannot be freed unharmed, fish caught with the gillnet are not suitable for keeping alive and must be killed immediately.

The target fish in inland fishing are mostly whitefish (vendace), perch , pikeperch , tench , carp , pike and whitefish . In the coastal fishing primarily herring , as well as cod , sea trout , flounder and plaice .

The use of set nets in inshore fishing is controversial because of the suspicion of large bycatch of marine mammals ( porpoises ), ducks ( eider and long-tailed duck ), but also loons ( red-throated divers ). The Federal Agency for Nature Conservation is conducting an investigation into this.

Gill nets have been used for at least 7,000 years, for example in China for crucian carp and carp fishing.

Individual evidence

1. ↑ Battle of the gillnet fisherman's world compact October 11, 2011 page 17
2. ↑ T. Nakajima, M. Nakajima, T. Mizuno, G.-P. Sun, S.-P. He, H.-Z. Liu: On the pharyngeal tooth remains of crucian and common carp from the neolithic Tianluoshan site, Zhejiang Province, China, with remarks on the relationship between freshwater fishing and rice cultivation in the Neolithic Age. In: International Journal of Osteoarchaeology , Volume 22, No. 3, 2012, pp. 294-304, doi : 10.1002 / oa.1206 .