Resumen
Se estudió las comunidades de peces en una quebrada de bosque y otra de pastizal en la vertiente caribeña de Costa Rica, durante la época seca (enero hasta mayo, 1985). Se distinguió 6 gremios de peces (omnívoro, insectívoro terrestre, herbívoro terrestre, algívoro, carnívoro, y especialista de diatómeas), según el tipo principal de alimento.
La estructura trófica total de cada comunidad no se diferenció mucho (índice de semejanza = 0.40, análisis AIDN), pero la proporción mayor de cada comunidad perteneció a solo uno: en la quebrada del bosque al gremio insectívoro terrestre y en la de pastizal al gremio de consumidores de diatómeas.
La temperatura máxima y abundancia de invertebrados acuáticos y perifiton fueron mayores en la quebrada del pastizal. El tipo de sustrato del fondo difirió entre las dos quebradas y podría interactuar con los niveles de luz influyendo sobre el tipo de recursos alimentarios.
Citas
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Derechos de autor 1988 Revista de Biología Tropical