Barbel development associated to aquatic surface respiration in Triportheus signatus (Characiformes: Triportheidae) from the semiarid Caatinga rivers

  title={Barbel development associated to aquatic surface respiration in Triportheus signatus (Characiformes: Triportheidae) from the semiarid Caatinga rivers},
  author={Luciano de Freitas Barros Neto and Rafael Gomes Frigo and Simone Almeida Gavilan and S{\'e}rgio Adriane Bezerra de Moura and Sergio Maia Queiroz Lima},
  journal={Environmental Biology of Fishes},
  pages={89 - 98}
In tropical regions, limestone aquatic environments of the Caatinga are more prone to hypoxia due to water heating, long drought periods, and high rates of organic decomposition. To circumvent this limitation, some fish species have developed different adaptations to maximize oxygen capture. These adaptations usually involve the capture of oxygen on surface layers, a mechanism known as aquatic surface respiration (ASR). In Characiformes, adaptations for ASR are related to the development of… 


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