Patagonian toothfish (Dissostichus eleginoides). Photo: INIDEP

The Marking Plan for toothfish specimens has been completed

ARGENTINA
Sunday, December 12, 2021, 18:00 (GMT + 9)

The activity was carried out on board the longliner Argenova XIV.

On December 6, the trip of the longliner Argenova XIV concluded, in which the plan to mark specimens of toothfish (Dissostichus eleginoides), located in the northern sector of the slope in the Argentine Sea, was launched.

The species has a wide distribution in the Southwest Atlantic Ocean, from latitude 37 ° to 56 ° South, on the slope and the continental shelf. Given the existence of new information related to their migratory movements and reproductive aspects, it was necessary to increase the biological-fishing knowledge of the species from the northern sector, from the 42 ° South, an area that is currently little visited by the fleet.

toothfish marking (Credit: INIDEP)

The tag and recapture program is a very useful tool to gather information about the movements of the species. During the trip made by the longline vessel, a total of 47 specimens of up to 100 cm in total length were tagged. The highest percentage of tagged individuals were juveniles, that is, less than 82 cm. Each fish was manipulated in order to minimize the stress resulting from the operation, in order to ensure the success of the experience.

Visiting the area and marking specimens is of great value to continue with the studies on the population structure of toothfish in the Argentine Sea. These kinds of initiatives, in collaboration with the shipowner sector, are very beneficial for the study of this fishery, which has been part of an Improvement Program (PROME) since the beginning of this year.

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