
handle: 10669/25976
Se estudiaron los hábitos alimenticios (composición, intensidad, diversidad, cambios ontogéneticos y estacionales) de Prionotus stephanophrys, Bellator gymnostethus y P. albirostris en la costa del Pacífico de Baja California Sur, México. Se capturaron 547 individuos de las tres especies con red de arrastre entre 1988 y 1990. El eufáusido Nyctiphanes simplex fue la presa principal de B. gymnostethus, que lo consumió durante las horas diurnas, y de P. stephanophrys, que lo hizo en la noche y al atardecer; los individuos mayores de P. stephanaphrys cambiaron al galateido Pleuroncodes planipes, lo cual coincidió con el paso del pez del medio pelágico al béntico. La intensidad de alimentación de este tríg!ido fue mayor en verano, después de ia reproducción. P. albirosfris se alimentó durante todo el día; su dieta, más diversa y equitativa, se basó en peneidos, pasifeidos y mísidos. Las diferencias en distribución, dieta y hora de alimentación indicaron un eficiente reparto de hábitat.
Composition, intensity, diversity, ontogenetic and seasonal changes of feeding of Prionotus stephanophrys, Bellator gymnostethus and P. albirostris were studied in the Pacific coast of Baja California Sur, Mexico. A total of 547 individuals of the three species were sampled between 1988 and 1990. The euphausiid Nyctiphanes simplex was the main prey of B.gymnostethus, which caught it during the day, and of P. stephanophrys, which ate it at night and twilight; latger individuals of P. stephanophrys shifted to Pleuroncodes planipes, a change that coincided with (he fish' shift from the pelagic to the benthic environment. Feeding intensity of this searobin was higher in summer, after reproduction. P. albirostris fed throughout the day; its diet, more diverse and equitable, was based on penaeids, pasiphaeids, and mysids. Differences in spatial distribution, diet and time of feeding suggested efficient habitat partitioning among these fishes,
eastern pacifico, prionotus stephanophrys, bellator gymnostethus, prionotus albirostris, triglidae, habitat pattitioning, food habits
eastern pacifico, prionotus stephanophrys, bellator gymnostethus, prionotus albirostris, triglidae, habitat pattitioning, food habits
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