Realm: Freshwater
Climate: Tropical
Biome: Small river ecosystems
Central latitude: -20.957421
Central longitude: -42.337185
Duration: 5 years, from 2003 to 2015

216 records

47 distinct species

Across the time series Xiphophorus hellerii is the most frequently occurring species

Methods

The study was conducted in the surroundings of the largest ornamental aquaculture center of South America, which has been in operation since 1979 in southeastern Brazil. The Muriaé Ornamental Aquaculture Center comprises 13 municipalities in Minas Gerais State, encompassing about 350 fish farms with 4,500 NFAF ponds, without screens on the effluent pipes to prevent escapes. We sampled five headwater creeks, all belonging to the Paraíba do Sul River basin, an important Brazilian freshwater ecoregion. These shallow silted warmwater channelized creeks run across the Atlantic Forest biome. Their mud banks do not have riparian vegetation; instead, they are covered by non-native grasses (Urochloa spp.), which were introduced due to cattle ranching, initiated since the 1940s. Fish were collected with rectangular hand sieving (95 cm long, 25 cm high, and 0.3 mm mesh), alongside the margins and channel beds, every 2 months (January to December), in each of the five headwater creeks located in the immediate vicinity of fish farms: Boa Vista (21° 01? 23? S; 42° 21? 45.7? W) in 2003 and 2015; Pinheiros (20° 53? 44.7? S; 42° 22? 03.5? W) in 2004 and 2015; Santo Antônio (20° 58? 18.7? S; 42° 19? 11.2? W) in 2005 and 2015; Chato (20° 57? 18.5? S; 42° 17? 25.1? W) and Gavião (20° 57? 12.4? S; 42° 16? 52.4? W) in 2006 and 2015. Two people sieved 50 times along 100-m-long transects during a 2 h in period in daylight in each creek. Fish were anesthetized and sacrificed by immersion in Eugenol (Griffiths, 2000), fixed in 10% formalin and transferred to 70% alcohol and later identified. Abundance counts were aggregated across sampling events in each year.

Citation(s)

@Article{BioTIME_cit357, Study_id = {594}, Citation_id = {357}, Author = {Magalh{\~a}es, Andr{\'e} L. B. and Daga, Vanessa S. and Bezerra, Luis A. V. and Vitule, Jean R. S. and Jacobi, Claudia M. and Silva, Luiz G. M.}, Journal = {Hydrobiologia}, Pages = {3987-3915}, Title = {All the colors of the world: biotic homogenization-differentiation dynamics of freshwater fish communities on demand of the Brazilian aquarium trade}, Volume = {847}, Year = {2020}, Doi = {10.1007/s10750-020-04307-w}, Language = {English} }