The effect of stress on the stomach of the European eel, Anguilla anguilla L.
In: Journal of Fish Biology. Fisheries Society of the British Isles: London,New York,. ISSN 0022-1112; e-ISSN 1095-8649, more
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| Keywords |
Biological stress
Biology > Organism morphology > Animal morphology
Interspecific relationships > Competition
Secretory organs > Alimentary organs > Stomach
Anguilla anguilla (Linnaeus, 1758) [WoRMS]
Marine/Coastal |
| Abstract |
The gastrointestinal tract is a system that is very sensitive to stress-like conditions in mammals. Fish display physiological reactions to stress that are fundamentally similar to those of the "General Adaptation Syndrome" in higher vertebrates. An investigation was therefore undertaken to determine if morphological changes equivalent to those affecting the stomachs of mammals also occur in fish under stress. Conflict for social dominance served as the stressor. The unavoidable confrontation with a dominant fish in a tank proved to produce great stress for the subordinate eel. This was demonstrated by a number of physiological and haematological parameters. |
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