Sistema digestivo y alimentación de los bagres (Pisces: Ariidae) del Golfo de México

Authors

  • A. Kobelkowsky D. Laboratorio de Peces. Departamento de Biología. Universidad Autónoma Metropolitana, Unidad Iztapalapa. Apdo. Postal 55-535, C.P. 09000 México, D.F.
  • M. Castillo-Rivera Laboratorio de Peces. Departamento de Biología. Universidad Autónoma Metropolitana, Unidad Iztapalapa. Apdo. Postal 55-535, C.P. 09000 México, D.F.

Keywords:

Catfishes, Ariidae, Gulf of Mexico, digestive system, feeding, comparative anatomy, resource partitioning

Abstract

Dentition, gill rakers, digestive tract, liver and swimming bladder of the catfishes, Cathorops melanopus, Ariopsis felis and Bagre marinus, from estuarine systems of the Gulf of Mexico, are described. A structural pattern of the digestive system in relation to an omnivorous benthophagous habit is recognized. The number of dental plates in palate and the intestinal length increase in the sequence C. melanopus -A. felis -B. marinus, while the number and size of gill rakers decrease. In B. marinus intestial loops form beside the stomach; in C. melanopus the posterior segment of the intestine is very long. The swimming bladder has internal partition, which is more complicated in B. marinus and less so in C. melanopus. Analysis of stomach contents shows a diet based mainly on decapods, fish and detritus. A trophic resource partitioning related to the prey size is recognized: C. melanopus feeds mainly on copepods and peracarids, A. felis on decapods, and B. marinus on fish. A relationship between diet and the alimentary anatomy is suggested. Main shifts in the alimentary tract during reproductive period are described.

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How to Cite

Kobelkowsky D., A., & Castillo-Rivera, M. (2016). Sistema digestivo y alimentación de los bagres (Pisces: Ariidae) del Golfo de México. HIDROBIOLÓGICA, 5(1, 2), 95–103. Retrieved from https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/585

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