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eran

Dr. Eran Gefen

Senior Lecturer

Phone: 972-4-9838837

Email: gefene@research.haifa.ac.il

Lab website

 


Education

2004 - Ph.D. (Zoology), Tel Aviv University

1998 - M.Sc. (Zoology), Tel Aviv University

1995 - B.Sc. (Animal Sciences), Hebrew University

 

Research Interests

My main area of research is environmental physiology of animals. More specifically, I am interested in water relations, respiratory physiology and energy metabolism of terrestrial arthropods in the context of evolution of environmental-stress tolerance. Temperature and water availability regimes are fundamental in determining the geographic distribution of terrestrial arthropods. Despite their small body size, and thus their relatively high body surface area to volume ratio, arthropods are the most successful terrestrial animals in both biomass and diversity, many of which occupy some of the hottest and driest habitats on earth. In my laboratory we are studying various aspects of the physiological mechanisms underlying resistance to environmental extremes.

 

Selected Publications

Talal S., Ayali A. and Gefen E. (2015). Discontinuous gas-exchange cycle characteristics are differentially affected by hydration state and energy metabolism in gregarious and solitarious desert locusts. J. Exp. Biol. 218: 3807-3815.

Huang S.P., Talal S., Ayali A. and Gefen E. (2015). The effect of discontinuous gas exchange on respiratory water loss in grasshoppers (Orthoptera: Acrididae) varies across an aridity gradient. J. Exp. Biol. 218: 2510-2517.

Gefen E., Talal S., Brendzel O., Dror A. and Fishman A. (2015). Variation in quantity and composition of cuticular hydrocarbons in the scorpion Buthus occitanus (Buthidae) in response to acute exposure to desiccation stress. Comp. Biochem. Phys. A. 182: 58-63.

Huang S.P., Sender R. and Gefen E. (2014). Oxygen diffusion limitation triggers ventilatory movements during spiracle closure when insects breathe discontinuously. J. Exp. Biol. 217: 2229-2231.

Kalra B. and Gefen E. (2012). Scorpions regulate their energy metabolism towards increased carbohydrate regulation in response to dehydration. Comp. Biochem. Phys. A. 162: 372-377.

Gefen E. and Brendzel O. (2011). Desiccation resistance and mating behavior in laboratory populations of Drosophila simulans originating from the opposing slopes of Lower Nahal Oren (Israel). J. Evol. Biol. 24: 2110-2117.

Gefen E. (2011). The relative importance of respiratory water loss in scorpions is correlated with species habitat type and activity pattern. Physiol. Biochem. Zool. 84: 68-76.

Gefen E. and Gibbs A.G. (2009). Interactions between environmental stress and male mating success may enhance reproductive isolation of stress-resistant Drosophila populations. Evolution 63: 1653-1659.

Gefen E. (2008). Sexual dimorphism in desiccation responses of the sand scorpion Smeringurus mesaensis (Vaejovidae). J. Insect Physiol. 54: 798-805.

 

Teaching

Invertebrate Zoology, General Animal Physiology, Comparative Animal Physiology

 

 

 

 

 

 

 

My main area of research is environmental physiology of animals. More specifically, I am interested in water relations, respiratory physiology and energy metabolism of terrestrial arthropods in the context of evolution of environmental-stress tolerance. Temperature and water availability regimes are fundamental in determining the geographic distribution of terrestrial arthropods. Despite their small body size, and thus their relatively high body surface area to volume ratio, arthropods are the most successful terrestrial animals in both biomass and diversity, many of which occupy some of the hottest and driest habitats on earth. In my laboratory we are studying various aspects of the physiological mechanisms underlying resistance to environmental extremes. Normal 0 false false false EN-US X-NONE HE