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Leporinus obtusidens


Leporinus obtusidens is a South American species of ray-finned fish that inhabits the basins of the Parana River and the Rio de la Plata, the Uruguay River, and the Sao Francisco River . It may be found in the main courses and streams, as well as in lakes and lagoons; it often shelters among stones and aquatic vegetation.

In Spanish its common name is boga (sometimes augmentative bogon); in Brazil it is known as piapara. There is also a variant called piava and another called tres puntos ("three dots"). This species is also known by the technical synonym Curimatus obtusidens. The common name boga is applied to many other species of fish, usually unrelated to this one.

Leporinus obtusidens has an elongated wide body, with a comparatively small head and a blunt mouth; its teeth are reminiscent of the incisors of Lagomorpha, whence the name of the genus . Its basic colour is a light greenish-gray, with three rounded dark spots in mid-flank, which may not be visible in some specimens. In young individuals there are also eight broad vertical streaks, joined in the back and coming down to the middle line. The back, as usual in this habitat, is darker than the belly.

The length and weight of the individuals are extremely variable according to the area, probably influenced by different feeding habits, opportunities and exploitation, as well as local sub-specific variants. In the Rio de la Plata L. obtusidens is reported as weighing an average of 2 kg, with a maximum of 4 kg; in the upper course of the Parana River it is about 4.5 kg; and in the middle course of the Parana there are specimens of boga over 6 kg (with exceptionally developed ones over 8 kg). Adult individuals are reported between 40 and 80 cm long. The larger fish probably belong to other species of Leporinus .

Leporinus obtusidens is an omnivore: it eats water plants, crabs and river snails. However, it prefers grain and seeds (wheat and maize), and it often gathers in large banks near ports, where cargo ships drop grains into the water. It is preyed upon by larger fish like the surubi and the sabalo. It prefers warm waters and reproduces in spring and summer, starting at 2 years of age.

References

Cordiviola de Yuan, E. and C. Pignalberi de Hassan, 1985. Fish population in the Parana River: lentic environments of Diamante and San Pedro areas (Argentine Republic). Hydrobiologia 127:213-218.

Migratory fishes of the Paraguay-Parana basin excluding the upper Parana basin

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article Leporinus obtusidens


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