SciELO - Scientific Electronic Library Online

 
vol.83 número1Uso de hospedadores por Philornis sp. en una comunidad de aves paseriformes de la parte central de ArgentinaAspectos biológicos y ecológicos de Xantusia sanchezi, una lagartija en peligro en un bosque de encino en el estado de Jalisco, México índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Revista mexicana de biodiversidad

versão On-line ISSN 2007-8706versão impressa ISSN 1870-3453

Resumo

MERCADO-SILVA, Norman et al. Environmental factors associated with fish assemblage patterns in a high gradient river of the Gulf of Mexico slope. Rev. Mex. Biodiv. [online]. 2012, vol.83, n.1, pp.117-128. ISSN 2007-8706.

Using multivariate analyses of fish community and environmental data, we explored associations among 13 fish species and 9 ecological guilds and identified ecological gradients that explain patterns in the fish community of the La Antigua River (Veracruz, Mexico). Altitude, distance to ocean, stream width, and water temperature were the most important variables explaining community composition. Sites with high altitudes (> 1 393 m), cold water (< 17°C), located far from the ocean (> 100 km) and less than 5 m wide were dominated by non-native Onchorhynchus mykiss. Many sites exclusively inhabited by native poeciliids were also narrow (< 2 m), but were located at intermediate altitudes (1 039-1 400 m) and distances to the ocean (> 80 km, < 100 km) and had warmer water temperatures (> 20°C). Because 7 guilds were exclusive to a single species, results from the guild analysis were very similar to species-specific analyses. Higher species and guild diversity were found in wider sites (> 5 m), sites with lower altitudes (< 600 m), and sites closer to the ocean (< 71 km). Variables related to human influence did not explain trends found in the fish communities.

Palavras-chave : Veracruz; fish community; Mexican rivers; La Antigua River; ecological gradients.

        · resumo em Espanhol     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons