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Day and night trophic variations of dominant fish species in a lagoon influenced by freshwater seeps

Authors

  • D. Arceo-Carranza,

    Corresponding author
    1. Laboratorio de Ecología, Unidad Multidisciplinaria de Docencia e Investigación, Universidad Nacional Autónoma de México Puerto de Abrigo s/n, Sisal, Hunucma, Yucatan, Mexico
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  • M. E. Vega-Cendejas,

    1. Laboratorio de Taxonomía y Ecología de Peces, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Mérida, México
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  • M. Hernández de Santillana

    1. Laboratorio de Taxonomía y Ecología de Peces, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Mérida, México
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Tel.: +52 5556226710 ext. 7149; email: danarceo@hotmail.com

Abstract

The aim of this study was to determine the trophic structure and nycthemeral variations in the diet of dominant fish species (Ariopsis felis, Bairdiella chrysoura, Micropogonias undulatus, Eucinostomus gula, Eucinostomus argenteus, Lagodon rhomboides and Sphoeroides testudineus) in Celestun Lagoon, a biosphere reserve located in the southern Gulf of Mexico, and influenced by freshwater seeps. A total of 1473 stomachs were analysed and nine trophic groups were recorded. Bray–Curtis analyses with analyses of similarity (ANOSIM) statistical tests were used to determine two groups of feeding guilds: zoobenthivores and omnivores, with significant differences between time and habitat. The relationships between fish feeding habits, size class and environmental variables were investigated using canonical correspondence analysis (CCA). Most of the species showed a low niche breadth with high specialization towards amphipod consumption, with the exception of L. rhomboides (0·60), which indicated generalist feeding. This study in a protected area is an important source of information for drawing up conservation policies in relation to the management of aquatic resources, and will aid in the establishment of priority areas for conservation.

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