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Environmental Change Alters Personality In The Rainbow Trout, Oncorhynchus Mykiss, Ashley J. Frost, Jack S. Thomson, Charlotte Smith, Hannah C. Burton, Ben Davis, Phillip C. Watts, Lynne U. Sneddon
Environmental Change Alters Personality In The Rainbow Trout, Oncorhynchus Mykiss, Ashley J. Frost, Jack S. Thomson, Charlotte Smith, Hannah C. Burton, Ben Davis, Phillip C. Watts, Lynne U. Sneddon
Lynne Sneddon, PhD
Boldness is a personality trait that defines how individuals respond to risky situations and has clear fitness consequences. Since the adaptive value of boldness is context dependent, the benefit of a distinct personality is less clear when the environment is unpredictable. An ability to modulate behaviour can be beneficial, although as behavioural plasticity itself may be costly this depends on the levels of environmental stability. Both boldness and its plasticity are linked with physiological stress coping mechanisms, whereby animals with reduced glucocorticoid responses to stress are bolder and less flexible in behaviour. We investigated the behavioural changes made by bold …
The Effects Of Acute And Chronic Hypoxia On Cortisol, Glucose And Lactate Concentrations In Different Populations Of Three-Spined Stickleback, E. A. O'Connor, T. G. Pottinger, L. U. Sneddon
The Effects Of Acute And Chronic Hypoxia On Cortisol, Glucose And Lactate Concentrations In Different Populations Of Three-Spined Stickleback, E. A. O'Connor, T. G. Pottinger, L. U. Sneddon
Lynne Sneddon, PhD
The response of individuals from three different populations of three-spined sticklebacks to acute and chronic periods of hypoxia (4.4 kPa DO, 2.2 mg l-1) were tested using measures of whole-body (WB) cortisol, glucose and lactate. Although there was no evidence of a neuroendocrine stress response to acute hypoxia, fish from the population least likely to experience hypoxia in their native habitat had the largest response to low oxygen, with significant evidence of anaerobic glycolysis after two hours of hypoxia. However, there was no measurable effect of a more prolonged period (seven days) of hypoxia on any of the fish in …