Abstract

DA COSTA, Igor David  and  NUNES, Natalia Neto dos Santos. Length-weight relationships of fishes from Tarumã River, Machado River drainage, Rondônia State, northern Brazil. rev. colombiana cienc. anim. Recia [online]. 2019, vol.11, n.2, pp.4-10.  Epub May 05, 2020. ISSN 2027-4297.  https://doi.org/10.24188/recia.v11.n2.2019.718.

The length-weight relationship has many functions in the area of fish ecology. The objective of this work is to provide the estimates of morphometric relationships for 13 freshwater fish species. Samples were collected with the aid of gillnets in May and September 2015 in the Tarumã river, Jaru Biological Reserve. Length-weight relationships were estimated from 343 specimens belonging to thirteen species, seven families and two orders. The linear regressions were significant (p≤0.001). The value of b varied from 1.36 in Leporinus friderici to 3.30 in B. amazonicus. The specie Colossoma macropomum had an isometric growth pattern (b=3.09). The new Length-weight relationships for 2 species, new maximum weight for 4 species and maximum sizes recorded for 3 species highlight the scarcity of information on biological aspects of Amazon fishes. These results can provide information for the FishBase as well as important data for the management of icthyofauna and conservation of the Tarumã River Basin.

Keywords : Amazonia; biological reserve; Conservation; Biodiversity; Ichthyofauna.

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