Reproductive biology of the saddle cichlid, Aequidens tetramerus (Heckel, 1840) (Cichliformes: Cichlidae), in small forest streams in the Machado River basin, southwestern Amazonia

Reproductive biology of the saddle cichlid, Aequidens tetramerus (Heckel, 1840) (Cichliformes: Cichlidae), in small forest streams in the Machado River basin, southwestern Amazonia

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The aim of this study was to evaluate the reproductive strategy Dog-Collars of Aequidens tetramerus in small streams of the Machado river basin, southwestern Amazon.We collected samples in two streams using seine and dip nets along a 50-m stretch of the stream.We collected 86 fishes, 19 males and 67 females (sex-ratio, 3.

52 female:1male).Their body size varied from 1.5 to 11.

5 cm.The size at first reproduction was 1.8 cm for females and 2.

0 cm for males.The TROPICAL TANGO reproductive season of the species occurred in the dry period.