Repartición de recursos alimentarios entre la Ictiofauna dominante de una Laguna templada de Baja California Sur, México.

Autores/as

  • V. H. Cruz-Escalona
  • L. Campos-Dávila
  • M. J. Zetina-Rejón

DOI:

https://doi.org/10.37543/oceanides.v25i1.75

Palabras clave:

Hábitos alimentarios, traslapamiento trófico, Laguna San Ignacio, México

Resumen

Se describe el uso de recursos alimentarios en las cinco especies de peces más abundantes en Laguna San Ignacio, Baja California Sur, México (Occidentarius platypogon, Cynoscion parvipinnis,
Menticirrhus undulatus, Trachinotus paitensis y Heterodontus francisci). Fueron analizados los espectros tróficos, los cambios temporales, la amplitud de dieta, la diversidad de presas y el traslape trófico. Se identificaron un total de 49 tipos alimenticios, los cuales fueron agrupados en seis grupos taxonómicos: crustáceos, moluscos, anélidos, equinodermos, sipuncúlidos y peces. Los crustáceos y moluscos aportaron un mayor número de presas, representando más del 75% de las  presas identificadas. Callinectes bellicosus, Penaeus californiensis, Squilla spp., Donax spp., Lucapinella milleri, Anachis spp. y Bittium spp., fueron las presas más importantes en los espectros descritos. Los espectros alimentarios presentaron diferencias temporales en la composición de presas. Todos los depredadores presentaron valores bajos de amplitud de dieta. Se determinó un bajo traslape trófico, excepto entre O. platypogon y C. parvipinnis, en los que se
encontró que la sobreposición de dietas es significativa (> 60%). Los resultados demuestran que cada especie tiene diferentes hábitos alimentarios que les permite segregarse a lo largo de las dimensiones del nicho trófico. Proponemos que la partición de recursos alimentarios es importante solo para peces con mayor traslape trófico. Las diferencias en morfología de sus aparatos alimentarios parecen estar correlacionadas con el tipo de presas consumidas.

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2010-06-04

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Cruz-Escalona, V. H., Campos-Dávila , L., & Zetina-Rejón, M. J. (2010). Repartición de recursos alimentarios entre la Ictiofauna dominante de una Laguna templada de Baja California Sur, México. CICIMAR Oceánides, 25(1), 1–15. https://doi.org/10.37543/oceanides.v25i1.75

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