Alimentación y ontogenia trófica alimentar de juveniles de characiformes en bancos de macrófitas acuáticas en el río Solimões/Amazonas
Food and ontogeny trophic of juvenile characiformes banks of macrophytes aquatics rio Solimões/Amazonas

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Autores

GILCIDEYA SILVA SOARES

GALDINO LEITE ROSSEVAL

Resumen

El ambiente de macrófitas acuáticas desempeña un importante papel como sítio de alimentación de peces juveniles del Orden Characiformes en la várzea de la Amazonia Central. En el presente trabajo fueron evaluadas las variaciones ontogenéticas en la dieta, en función del aumento corporal de juveniles de Brycon amazonicus, Triportheus angulatus, Mylossoma duriventre y Semaprochilodus insignis recolectados en bancos de macrófitas en un trecho del río Solimões/Amazonas. Fueron analizados 1.181 ejemplares, los especímenes fueron divididos arbitrariamente en tres clases de desarrollo de acuerdo con la longitud estándar (CP): clase I (15-30 mm), clase II (31-45 mm) y clase III (46-60 mm). Para el análisis de la dieta fue calculado el Índice Alimentar (IAi), combinando los métodos de frecuencia de ocurrencia y volumen relativo. Fueron observadas variaciones ontogenéticas en la dieta de M. duriventre y de T. angulatus durante la fase juvenil. Todas las especies muestreadas poseen forrajeo selectivo y llegan al fin de la fase juvenil con comportamiento trófico semejante al que presentan en la fase adulta.

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Referencias

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