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Collected from temporary streams, drying completely during the dry season (September to February) and flowing on the rainy season (March to August). Small groups of adults were found on the bottom and marginal portions of the streams in April. Juveniles in large schools were collected along the bottom of the stream in August. Other species collected together with Tyttobrycon marajoara were Aequidens tetramerus (Heckel), Apistogramma agassizii (Steindachner), Acaronia nassa (Heckel), Bryconops melanurus (Bloch), Copella arnoldi (Regan), Crenuchus spilurus Günther, Curimatopsis crypticus Vari, Hemigrammus levis Durbin, Hemigrammus ocellifer (Steindachner), Hemigrammus rhodostomus Ahl, Hemigrammus rodwayi Durbin, Hoplerythrinus unitaeniatus (Spix & Agassiz), Hoplias malabaricus (Bloch), Hyphessobrycon heterorhabdus (Ulrey), Megalechis sp., Microcharacidium weitzmani Buckup, Moenkhausia collettii (Steindachner), Nannostomus eques Steindachner, Nannostomus nitidus Weitzman, Pyrrhulina sp. and Rivulus sp. (Ref. 94718). |