A Tractor That Will Not Stop

Fighters and large tents in the r fly fishing you Negro and Limay. The future of a species extremely sporty. Note with video.

Tents in Patagonia! A hot topic these days, something that is surprising taking into account that this fish has, at a minimum, 30 years of presence in the region. Entering the Colorado River basin occurred in the mid-‘ 80s when the Curaco River, carrier of the Desaguadero/Salado system and water column in the Cuyo region, overflowed at the height of the Pichi Mahuida reserve. In the basin of the rio Negro, the first scientific record dates back to 1995, and was always attributed to a seeding to combat algae in their channels. Today, biologists from the environmental direction of Colonel rock do not rule out that it could have happened as a natural transfer between Colorado/black, during a unique growing.

The only thing that stopped their migration upstream in this latest basin were dams: stream on the lower River Limay, and Ingeniero Ballester on the Neuquén River. Also spoken introductions or leaks, many decades ago, in the Nahuel Huapi National Park. During the Decade of the ‘ 90s, while attending the University of Comahue aquaculture, several professors I talked about sightings of koi carp (ornamental variety of Cyprinus carpio) feral in the Lake, as well as accidental release of ponds or juvenile discarded by aquarists. They did not generate populations, since cold temperatures inhibit the development of gonads during the critical period of winter/spring, you need a minimum of 17 ° C. In the area of El Bolsón, Río Puelo basin, authorities in Chubut come with concern the proliferation of ponds with this species. Daniel Wegrzyn and Silvia Ortubay, in his book trout in Patagonia, cite a Fugue on the Futaleufú River, apparently without consequences.

By its rusticity, plasticity and high fertility, the CARP could never be eradicated once he entered an environment. The introduction of predators to control it, or onerous directed fishing programs, had between dubious and disastrous results. The only cases where he had success was in small environments, where is chemically exterminated all the fish, and then the natives are reintroduced. A myth regarding the tent is that their eggs adhere to the plumage of birds, allowing the colonization of new areas. This is false: eggs are adhesive, and are very fragile to changes of temperature or exposure to air.

Described, the carp in Patagonia represents, on the one hand, a great opportunity, and on the other a great responsibility. Responsibility to articulate the means to prevent an increase in its distribution. And opportunity, because it is an extremely sporty kind, and in areas where it is installed its fisheries can contribute to sustainable regional economies. CARP is an exotic organism, as there are dozens in Argentina, which requires a multidimensional discussion, no reductionism or simplifications. Show what it is, as recognized by the own Patagonian Continental rules, sport fish is one of many and the aim of this note.

Note published in the Weekend 512, may, 2015. To subscribe to the magazine and receive it free of charge at your home address, click here.

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