Haematology and acute inflammatory response of Oreochromis niloticus (Osteichthyes: Cichlidae) submitted to a single and consecutive stress of captura capture

  • Martins M
  • Pilarsky F
  • Onaka E
 et al. 
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Abstract

This work evaluated the effects of two different intensities of 30 s stress of emersion on the haematological and inflammatory response in the swim bladder of Oreochromis niloticus. Fish were acclimated for 10 days, distributed in 4 treatments: injection with 0.5 mL of sodium chloride solution 0.65%, 500 [mu]g carrageenin, 3 mg LPS/kg body weight and non-injected; 3 experimental groups constituted by a single stress (SE), consecutive stress (CE) in which the stress was applied 4 times every 60 min and non-stressed fish (NS) with 3 replicates. There was no change in the plasma cortisol concentration, total leucocytes number and hematocrit after SE, CE and NE. On the other hand, CE provoked significant increasing in glucose of all treatments. In fish submitted to SE and CE increased erythrocytes number after carrageenin and LPS injection was observed. Increased neutrophil percentage and decreased lymphocyte percentage were the main characteristics observed in the differential counting of leucocytes after CE. Moreover, carrageenin and LPS injected fish showed the highest leucocytes number in the inflammatory exudate in comparison to saline injected. Tilapia showed different response when submitted to the same stress in comparison to previously evaluated Piaractus mesopotamicus and the hybrid tambacu.

Author-supplied keywords

  • Animalia, Chordata, Vertebrata, Pisces, Osteichthy
  • Chordates
  • Circulatory system
  • Emersion stress / Haematological & inflammatory re
  • Fish
  • General morphology
  • Haematological response to emersion stress] [Infla
  • Immunology and repair mechanisms
  • Oreochromis niloticus (Cichlidae).
  • Oreochromis niloticus [Gas bladder / Swim bladder
  • Perciformes, Cichlidae
  • Tissue reactions
  • Vertebrates
  • Whole animal physiology
  • inflammatory response to emersion stress] [Physiol
  • to emersion stress].

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Authors

  • Mauricio Laterca Martins

  • Fabiana Pilarsky

  • Eduardo Makoto Onaka

  • Daniela Takahashi Nomura

  • Jaime Fenerick Jr

  • Karina Ribeiro

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