Behavior of stream fishes: methods for a naturalistic approach

Abstract

The current knowledge on the behavior of Brazilian stream fishes is restricted to few studies. These works show that streams are well suited for behavioral studies emphasizing fish natural history. In this chapter, the main sampling techniques and recording methods used in behavioral studies are presented. These methods combined with diving techniques are effective tools for studies of stream ichthyofauna. Naturalistic studies allow direct observations of behavior and may bring an accurate knowledge of fish biology, It is desirable to have more studies on the behavior of stream fishes focusing on aspects such as feeding tactics, reproductive strategies, and defensive mechanisms. Besides their scientific and teaching value, naturalistic studies cause little impact on t he environment and may serve as a basis for other lines of research, such as ecology of communities, ecomorphology, ecophysiology, and couservation.