Length-weight relationships of seven fish species from Amazonian Equatorial coast, Brazil

Parameters of the length-weight relationship (LWR) were estimated for seven fish species from Amazonian Equatorial coast of Maranhao, Brazil. Samplings were carried out in three sample points of the lower stretch of the Itapecuru River (2 degrees 57'6.2S and 44 degrees 14'26.5W; 3 degrees 0'33.0S and 44 degrees 15'54.7W; 3 degrees 3'42.9S and 44 degrees 15'1W). The specimens were caught quarterly from June 2012 to August 2014 using monofilament gillnets (10, 20, 30, 40, 50, 60, 70 and 80 mm between knots) from 10 m to 30 m long and 4 m to 6 m high. This study provides the LWR parameters for Schizodon dissimilis, Curimata macrops, Prochilodus lacustris, Geophagus surinamensis, Hassar affinis, Platydoras brachylecis and Hypostomus plecostomus.