Red Orbit, 27 November 2010

Am Spanischen Ozeanographischen Institut (IEO) wurden weitere Ziele für die Zucht von Rotem Thunfisch erreicht. Offenbar können sich diejenigen Fische, die zuvor bereits in einem Mastbetrieb gelebt hatten, schneller an die neu entwickelten Tanks von 25 Meter Länge und 12 Meter Tiefe gewöhnen als freilebende Tiere, die direkt dorthin gebracht wurden. Das Ziel ist es, die Tiere soweit zu bringen, dass sie sich in Gefangenschaft vermehren, was bisher noch nicht der Fall war.

Hoffen wir, dass diese Nachricht die wilden Thunfischbestände retten kann.

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Red Orbit, 27 November 2010

Researchers at the Spanish Oceanographic Institute (IEO) have taken a new step towards achieving the domestication of bluefin tuna. A dozen juveniles have been adapted to the captivity in land based facilities, something that had already been successfully achieved in Japan, Australia and the USA in other species of tuna.

Research scientists Fernando de la Gándara and Aurelio Ortega, along with technicians Juan Ramón Prieto and Javier Viguri from the tuna culture team at the IEO, have managed to adapt around twenty juvenile bluefin tuna (Thunnus thynnus), to captivity in land based facilities at the Plant for Marine Culture at the Murcian Oceangraphic Centre.
Some of the individuals were captured with a barbless hook and line just in front of the coast of Mazarrón, and transported directly to the Marine Culture facilities of the IEO in Mazarrón

Others were captured in front of Cabo de Palos and previously adapted to captivity in floating cages situated in the bay of El Gorguel, managed by the company Caladeros del Mediterráneo belonging to the Ricardo Fuentes group, prior to being transported to the IEO installations in Mazarrón. The survival rate in the first case was 70% while in the second case it was 100%, fundamentally due to the fact that in this second case the individuals had already been adapted to captivity in the cages. The twenty juveniles, each of around a kilo in weight, have been housed over the past two weeks in a fiberglass tank 8m wide x 2m deep. They are being fed with fresh anchovy and sardine pieces and show a very active feeding behavior.

Handling of this species is extremely difficult given it´s great sensitivity and the fact that it is a pelagic fish that is accustomed to living in an open-water environment, where no obstacles exist.

Let’s hope this can save the wild Bluefin Tuna stocks.