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First published online December 1, 2006
Journal of Experimental Biology 209, 4878-4884 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02531
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Improving sneaky-sex in a low oxygen environment: reproductive and physiological responses of male mosquito fish to chronic hypoxia

Alecia J. Carter and Robbie S. Wilson*

School of Integrative Biology, The University of Queensland, St Lucia, QLD 4072, Australia


Figure 1
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  		Fig. 1. Effect of partial pressure of oxygen on the sustained swimming performance (Umax) of male eastern mosquito fish Gambusia holbrooki acclimated to either hypoxic or normoxic conditions for at least 4 weeks. Values are means ± s.e.m., N=15 for each acclimation group. *Significant results at P<0.05.

 

Figure 2
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  		Fig. 2. Effect of partial pressure of oxygen on the mating behaviour (non-competitive environment) of male eastern mosquito fish Gambusia holbrooki acclimated to either hypoxic or normoxic conditions for at least 6 weeks. (A) The total time males spent following females, (B) total number of attempted copulations and (C) the total number of successful copulations recorded during a 10 min observation period in a non-competitive environment. Values are means ± s.e.m., N=15 for each acclimation group. *Significant results at P<0.05.

 

Figure 3
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  		Fig. 3. Effect of partial pressure of oxygen on the mating behaviour (male-male competitive environment) of male eastern mosquito fish Gambusia holbrooki acclimated to either hypoxic or normoxic conditions for at least 6 weeks. (A) The total time males spent following females, (B) total number of attempted copulations and (C) the total number of successful copulations recorded during a 10 min observation period in a male-male competitive environment. Values are means ± s.e.m., N=15 for each acclimation group. *Significant results at P<0.05.

 

Figure 4
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  		Fig. 4. Effect of partial pressure of oxygen on the time (s) spent in aquatic surface respiration (ASR; male-male competitive environment) by male eastern mosquito fish Gambusia holbrooki acclimated to either hypoxic or normoxic conditions for at least 6 weeks. Values are means ± s.e.m., N=15 for each acclimation group. *Significant results at P<0.05.

 




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