Natureza & Conservação Natureza & Conservação
Nat Con 2016;14:106-11 DOI: 10.1016/j.ncon.2016.06.003
Research Letters
Trends in studies of Brazilian stream fish assemblages
Murilo S. Diasa,, , Jansen Zuanonb, Thiago B.A. Coutoc, Marla Carvalhob, Lucélia N. Carvalhod, Helder M.V. Espírito-Santob, Renata Fredericoi, Rafael P. Leitãoe, Amanda F. Mortatif, Tiago H.S. Pirese, Gislene Torrente-Vilarag, Julio do Valec, Maeda B. dos Anjose, Fernando P. Mendonçah, Pablo A. Tedescoj,k
a Department of Ecology, Universidade de Brasília (UnB), Brasília, DF, Brazil
b Biodiversity Coordination, Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, AM, Brazil
c Post-graduation in Ecology, Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, AM, Brazil
d Institute of Natural, Human and Social Sciences, Universidade Federal de Mato Grosso (UFMT), Sinop, MT, Brazil
e Post-graduation in Freshwater Biology and Inland Fisheries, Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, AM, Brazil
f Department of Biology, Universidade do Estado de Mato Grosso (UNEMAT), Alta Floresta, MT, Brazil
g Department of Sea Sciences, Universidade Federal de São Paulo (UNIFESP), Santos, SP, Brazil
h Institute for Health and Biotechnology, Universidade Federal do Amazonas (UFAM), Coari, AM, Brazil
i Institute of Biological Sciences, Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
j UMR 5174 EDB (Laboratoire Evolution et Diversité Biologique), CNRS-UPS-ENFA-Université Paul Sabatier Toulouse 3, Toulouse, France
k UMR BOREA, MNHN-CNRS 7208-UPMC-IRD 207-UCN-UA, Museum National d’Histoire Naturelle, Paris, France
Received 19 November 2015, Accepted 12 June 2016

Studies about fish assemblages in Brazilian streams have grown in recent years, however, it remains unclear whether this increase is followed by increments in the diversity of addressed topics and theoretical frameworks adopted by researchers. We performed a systematic search for Brazilian studies on stream fish assemblages recording study region, publication year, objectives, and spatial and temporal scales adopted. The number of studies is unevenly distributed among regions. Most papers describe the general structure of local fish assemblages and their scientific objectives have not varied through time. Studies have been conducted mainly at small temporal and spatial scales, though the latter is increasing over time. We argue for the need of focusing on recently developed ecological theories and frameworks, and expanding the temporal and spatial scales of studies. These changes will improve regional and local conservation policies, and the visibility of aquatic Brazilian research in the global scientific community.

Neotropical streams, Stream fishes, Spatial scale, Temporal scale, Meta-analysis