COD could keep flush fishing Fischer

Analysis shows wild fish training drive is economically advantageous.Could be training again on an area to capture cod more profitable than conventional fish are.Doug Allan / naturepl.com

Ranching cod from Icelandic coast is a new analysis than conventional methods or keep the fish in cages financially reasonable far more.

Fish fishing - where the animals are free, but returns trained to a certain point, so that they can - be caught could one day a significant part of the global fisheries, mounting between traditional catch and aquaculture, says Bj?rn Bj?rnsson, the main author of the study, 1 April1 published in the maritime policy. It could even reduce the catch of fish, not the target species or are undersized, says Bj?rnsson, a fisheries scientist at the Marine Research Institute in Reykjavik.

'Ranching' can fish to roam freely, but attempts to condition their behavior can be so they rounded up to the feeding and eventual capture. Some scientists experiment with sound signals of this condition the fish back to feeding stations. But Bj?rnsson of economic analysis is based on a simpler way, by the otherwise wild fish are dictated by the regular feeding of certain feed stations.

Based on data from an experiment from Iceland, Bj?rnsson carried out in 2005 / 06, estimates, that fishing the most profitable way of implementing cod on plate, followed by traditional fishing and then wild fish capture for cultivation in pens.

He estimates that a typical fishing boat could make a profit of €71,000 (US$ 103,000), traditional fishing, for 200 tonnes of cod. But those involved in the same boat in cod fishing in more than 36 tonnes of cod with a net profit of € 150,000 could bring.

"In future fishing in 'Herds' a significant part of the agriculture/fisheries industry could be worldwide", says Bj?rnsson. "It will have not to reduce the conventional agriculture and fishing;" "The total yield of fish for human consumption can increase quite it."

And it could be done in an environmentally friendly way, adds he added. Instead of randomly netting all fish around the target animals, training would respond a herd to stimuli that fishermen could take only the way they were at the same time the right size were.

Previous efforts to fish, fishing have met with limited success. In the United States, also preliminary experiments with animal husbandry with sound like a herding signal a lawsuit over fears attracted pollution cause feeding the animals and could disrupt ecosystems (see: lawsuit chips away at fish research).

Ray Hilborn, a fisheries scientist at the University of Washington in Seattle, notes that the used in this study method differs from other types of fish breeding.

"The traditional approach to play the young fish in hatcheries, they go and have it come back," he says. "[What Bj?rnsson team] are really do feed to aggregate fish used."

In this case and in traditional fish fishing, could it problems which ranched fish in competition with other animals and hiking in waters of traditional fishermen were applied.

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Scott Lindell, Director of the scientific program of aquaculture at the marine biological laboratory in Woods Hole, Massachusetts, noted that previous efforts to the fishing of political and social conflicts, which the fish are thwarts was have.

"It is possible but requires to do as much social engineering like nothing with fish," he says. Smaller bodies of water such as Lakes could animal husbandry more feasible and small communities make it easier, could find a consensus, he says.

"The economic viability of important to convince the fisheries and agriculture, industry, science, to develop research and authorities that it is worth, this idea of the benefits of mankind", says Bj?rnsson. "The controversial legal issues be are sorted out if result this idea that the best is to maximize of the wild fish stocks."

Halldórsson, j., Bj?rnsson, B. & Gunnlaugsson, p. B. maritime policy doi:10.1016/j.marpol.2011.03.001 (2011) If you something offensive or inappropriate or otherwise not fulfilled see our conditions or Community guidelines, select the relevant 'report this comment' - Link.Kommentare on this thread are marked according to the time of booking.

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