Data/hora: 02/06/2024 01:31:21

Provedor de dados: | 83
País: | Brazil
Título: | Culverts in paved roads as suitable passages for Neotropical fish species
Autores: | Makrakis,Sergio; Castro-Santos,Theodore; Makrakis,Maristela Cavicchioli; Wagner,Ricardo Luiz; Adames,Maurício Spagnolo.
Data: | 2012-10-01
Ano: | 2012
Palavras-chave: | Barriers; Criteria for culverts; Road crossing; Stream.
Resumo: | Improperly installed or poorly maintained culverts can pose a serious threat to fish by disrupting their habitat and endangering spawning success. Road culverts that are not designed for fish passage frequently can become obstacles. This can be especially problematic for migratory species, but can lead to fragmentation of resident populations as well. This study evaluated 40 culverts of 29 sites within a 25-km radius from Toledo city, Paraná State, southern Brazil, with respect to their likely effects on movement of the local ichthyofauna. We collected data on the shape and length of culverts, culvert material, waterfall height, water column depth, slope, and estimated flow velocity. Culverts were categorized by level of barrier risk for upstream migration: high, medium, low, and impassable, as well as the type of barrier posed (fall height, depth, length and velocity). Most of culverts analyzed were considered potential barriers to fish movement, with 45% classified as impassible, 45% as high risk, 10% as medium risk, and no culverts as low risk. Brazilian culverts as fishways will require additional monitoring and studies to corroborate the premises proposed in the present study. Road culvert projects that are properly built and maintained will be able to simultaneously improve function of roadways and protect fish populations.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400009
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252012000400009
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.10 n.4 2012
Fonte: | info:eu-repo/semantics/openAccess