Prochilodus lineatus (synonym P. platensis) is a South American species of ray-finned fish that inhabits the basin of the Parana River and the Paraguay River in the Argentine Mesopotamia and Paraguay, the Pilcomayo River in Bolivia, and the Paraiba do Sul River in Brazil. In Spanish its common name is sabalo; in Brazil it receives the names curimbata, curimba, corimbata or grumata. In the United States it is also known by the technical synonym Tarpon prochilodus. There are many other species of fish with the common name sabalo; P. lineatus is therefore distinguished sometimes as sabalo jeton (colloquial Spanish for "big-mouth") or chupabarro ("mud-sucker").
P. lineatus has a maximum length of about 50-60 cm and measures up to 6 kg. Its body is tall and compressed, greenish-gray (lighter in the belly), with yellowish green fins. Its mouth is circular and projects towards the front; it has two series of small teeth.
This fish prefers deep waters and it is illiophagus, i. e. it sucks and eats organic mud, for which its mouth is especially adapted. This incidentally makes it difficult to fish with a bait. It migrates in large banks, looking for warm waters during the spring in order to lay its eggs.
Situation in the Parana River
P. lineatus is considered the key species of the Parana River, since it forms the base of the food chain that ends with larger fish like the surubi. Regulations in place in Santa Fe and Entre Rios, Argentina, have proven ineffective to preserve the species, which is being severely exploited, both for internal consumption and for export. Experts estimate that capturing 20,000 tonnes of sabalo per year is the upper limit of sustainability. Exports, however, of about 13,000 tonnes in 1998, grew to 34,000 tonnes in 2004, after the depreciation of the Argentine peso caused by the economic crisis tripled its local value.
As the fish population dwindles, fishermen who depend on their captures for their livelihood are keeping smaller specimens, often not mature and which therefore have had no time to reproduce.
Widespread disregard of prescribed net sizes and the presence of illegal processing plants, which the local governments do not control, have compelled environmental groups to protest. The issue turned into a jurisdiction conflict when Santa Fe tightened the regulations in 2005, forbidding the capture of sabalos under 42 cm long, while Entre Rios kept the limit looser at 40 cm. On July 13, about 400 fishermen blocked the Rosario access to the Rosario-Victoria Bridge that joins the two provinces. On August 1, after Entre Rios matched its regulations with those of Santa Fe, 300 fishermen and freezing plant workers from Victoria did the same. They were pressured, according to certain claims, by the threat of unemployment if their plants cannot fill their export quotas.
In October 2006, largely to facilitate the reproduction of sabalo, the legislative branch of Santa Fe attempted to pass a temporary ban on commercial fishing in the Parana. [*] This ban was vetoed by the executive, as it had no counterpart in the neighbouring Entre Rios. On 21 December 2006, the national government banned exports of fish of the Parana River for eight months starting on 1 January 2007. [*]
See also: Foreign trade of Argentina.
References and sources
Species Summary. Froese, R. and D. Pauly. Editors. 2005. FishBase. World Wide Web electronic publication. www.fishbase.org, version (06/2005). Sourced from Gery, J., 1977. Characoids of the world. T.F.H. Publications, Inc., N.J. Page 219.
Los Peces Que Tenemos (in Spanish)
Pesca & nautica: Nuestros peces (in Spanish)
Pesca en Argentina (in Spanish)
Fundacion PROTEGER, Amigos de la Tierra, Argentina
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article Prochilodus lineatus