Prof. Itzhak Choshniak

Retired in School of Zoology
ביה"ס לזואולוגיה בדימוס
Prof. Itzhak Choshniak
Phone: 03-6409819
Fax: 03-6409403
Office: Sherman - Life Sciences, 310



1970- B.Sc., Biology, Tel-Aviv University

1972- MSc., Zoology, Tel-Aviv University

1978- Ph.D., Physiology, Tel-Aviv University

1979- Post-Doc., Hannah Research Institute Scotland

1980- Post-Doc., School of Veterinary Medicine Hanover , Germany

1981 -Faculty Member, Zoology Department, Tel Aviv University


Research Interests

Itzhak (Chosh) Choshniak’s research engages with comparative aspects of energy and water economy of desert herbivores,  their adaptation to extreme conditions  (food restriction and water deprivation),  hypoxia and hypercapnic environments.   He is also investigating the use of carbonic anhydrase isozymes as early warning bio-indicators for the detection of heavy metals in polluted water.


Recent Publications

Choshniak, I. and A. Shkolnik. 1977. The rumen as a protective osmotic mechanism during rapid rehydration in the black Bedouin goat. Alfred Benzon Symp. XI, 344-3).


Choshniak, I. and A. Shkolnik. 1977. Rapid rehydration in the black Bedouin goat: Red blood cell fragility and role of the rumen. Comp. Biochem. Physiol. 56A, 581-583.


Choshniak, I. , B.G. Munck, and E. Skadhauge. 1977. NaCl transport across the chicken coprodeum. Basic characteristics and dependence on NaCl intake. J. Physiol. Lond. 271, 489-504.


Dmi'el, R., D. Robertshaw, and I. Choshniak. 1979. The control of sweating in the Bedouin goat. Physiol. Zool. 52, 558-564.


Choshniak, I. , D. McEwan Jenkinson, Blatchford D.R. and M. Peaker. 1982. Blood flow and catecholamine concentration in bovine and caprine skin during thermal sweating. Comp. Biochem. Physiol. 71C, 37-42.


Maltz,E., Olsson,K., Glick,S.M., Fyhrquist,F., Silanikove,N., Choshniak, I. , and Shkolnik,A., 1984. Homeostatic Responses to Water-Deprivation Or Hemorrhage in Lactating and Non-Lactating Bedouin Goats. Comparative Biochemistry and Physiology A-Physiology 77, 79-84.


Choshniak, I. , Arnon,H., and Shkolnik,A., 1984. Digestive Efficiency in A Wild Goat - the Nubian Ibex. Canadian Journal of Animal Science 64, 160-162.


Choshniak, I. , Wittenberg ,C., Rosenfeld,J., and Shkolnik,A., 1984. Rapid Rehydration and Kidney-Function in the Black Bedouin Goat. Physiological Zoology 57, 573-579.


Choshniak, I. and Arnon,H., 1985. Nitrogen-Metabolism and Kidney-Function in the Nubian Ibex (Capra Ibex nubiana). Comparative Biochemistry and Physiology A-Physiology 82, 137-139.


Wittenberg ,C., Choshniak, I. , Shkolnik,A., Thurau,K., and Rosenfeld,J., 1986. Effect of Dehydration and Rapid Rehydration on Renal-Function and on Plasma-Renin and Aldosterone Levels in the Black Bedouin Goat. Pflugers Archiv-European Journal of Physiology 406, 405-408.


Brosh,A., Choshniak, I. , Tadmor,A., and Shkolnik,A., 1986. Infrequent Drinking, Digestive Efficiency and Particle-Size of Digesta in Black Bedouin Goats. Journal of Agricultural Science 106, 575-579.


Brosh,A., Shkolnik,A., and Choshniak, I. , 1986. Metabolic Effects of Infrequent Drinking and Low-Quality Feed on Bedouin Goats. Ecology 67, 1086-1090.


Israely,H. and Choshniak, I. , 1985. Energy-Metabolism and Digestibility in Donkeys Fed Low Quality Food.Israel Journal of Zoology 33, 116.


Choshniak, I. and Yahav,S., 1987. Can Desert Rodents Better Utilize Low Quality Roughage Than Their Non-Desert Kindred. Journal of Arid Environments 12, 241-246.


Choshniak, I. , Wittenberg ,C., and Saham,D., 1987. Rehydrating Bedouin Goats with Saline - Rumen and Kidney-Function. Physiological Zoology 60, 373-378.


Brosh,A., Shkolnik,A., and Choshniak, I. , 1987. Effects of Infrequent Drinking on the Nitrogen-Metabolism of Bedouin Goats Maintained on Different Diets. Journal of Agricultural Science 109, 165-169.


Israely,H., Brosh,A., and Choshniak, I. , 1987. Physiological-Characteristics That Help Goats and Donkeys to Cope with the Nitrogen Shortage in Desert Forage. Israel Journal of Zoology 34, 97.


Raed,M., Choshniak, I. , and Shkolnik,A., 1987. Effect of Excessive Environmental Heat Load on the Bioenergetics of the Black Mamber Goat. Israel Journal of Zoology 34, 96-97.


Brosh,A., Choshniak, I. , Tadmor,A., and Shkolnik,A., 1988. Physicochemical Conditions in the Rumen of Bedouin Goats - Effect of Drinking, Food Quality and Feeding Time. Journal of Agricultural Science 111, 147-153.


Izraely,H., Choshniak, I. , Stevens,C.E., Demment,M.W., and Shkolnik,A., 1989. Factors Determining the Digestive Efficiency of the Domesticated Donkey (Equus asinus asinus). Quarterly Journal of Experimental Physiology and Cognate Medical Sciences 74, 1-6.


Yahav,S. and Choshniak, I. , 1989. Energy-Metabolism and Nitrogen-Balance in the Fat Jird (Meriones crassus) and the Levant Vole (Microtus guentheri). Journal of Arid Environments 16, 315-322.


Izraely,H., Choshniak, I. , Stevens,C.E., and Shkolnik,A., 1989. Energy Digestion and Nitrogen Economy of the Domesticated Donkey (Equus asinus asinus) in Relation to Food Quality. Journal of Arid Environments 17, 97-101.


Yahav,S. and Choshniak, I. , 1990. Response of the Digestive-Tract to Low Quality Dry Food in the Fat Jird (Meriones crassus) and the Levant Vole (Microtus guentheri). Journal of Arid Environments 19, 209-215.


Kasirer,H., Izraely,H.K., Choshniak, I. , and Shkolnik,A., 1992. Rehydration in the Donkey - Role of the Hindgut. Faseb Journal 6, A950.


Foley,W.J., Bouskila,A., Shkolnik,A., and Choshniak, I. , 1992. Microbial Digestion in the Herbivorous LizardUromastyx aegyptius (Agamidae). Journal of Zoology 226, 387-398.


Rubal,A., Choshniak, I. , and Haim,A., 1992. Daily Rhythms of Metabolic-Rate and Body-Temperature of 2 Murids from Extremely Different Habitats. Chronobiology International 9, 341-349.


Moravi,V., David,D., Akselrod,S., Bitton,Y., and Choshniak, I. , 1993. Myocardial Regional Blood-Flow - Quantitative Measurement by Computer-Analysis of Contrast-Enhanced Echocardiographic Images. Ultrasound in Medicine and Biology 19, 619-633.


Shaham,D., Choshniak, I. , Rosenfeld,J., Witenberg,C., Thurau,K., and Shkolnik,A., 1994. Neural Control of Renal-Function in Newly Rehydrated Bedouin Goats. Comparative Biochemistry and Physiology A-Physiology 107, 57-61.


Shaham,D., Choshniak, I. , Rosenfeld,J., Witenberg,C., Thurau,K., and Shkolnik,A., 1994. Modulation of Plasma Arginine-Vasopressin During Rehydration in the Bedouin Goat. Journal of Comparative Physiology B-Biochemical Systemic and Environmental Physiology 164, 112-117.


Choshniak, I. , Benkohav,N., Taylor ,C.R., Robertshaw,D., Barnes,R.J., Dobson,A., Belkin,V., and Shkolnik,A., 1995. Metabolic Adaptations for Desert Survival in the Bedouin Goat. American Journal of Physiology-Regulatory Integrative and Comparative Physiology 37, R1101-R1110.


Mualem,R. and Choshniak, I. , 1995. Modulation of Water and Solute Transport Following Food Restriction in the Colons of the Levant Vole (Microtus guenteri) and the Mouse (Mus musculus). Physiological Zoology 68, 524-538.


Tandler,A., Anav,F.A., and Choshniak, I. , 1995. The effect of salinity on growth rate, survival and swimbladder inflation in gilthead seabream, Sparus aurata, larvae. Aquaculture 135, 343-353.


Rubal,A., Haim,A., and Choshniak, I. , 1995. Resting metabolic rates and daily energy intake in desert and non-desert murid rodents. Comparative Biochemistry and Physiology A-Physiology 112, 511-515.


Choshniak, I. and Mualem,R., 1997. SCFA and electrolyte absorption in the colon of three rodent species.Comparative Biochemistry and Physiology A-Physiology 118, 381-384.


Unna ,R.B., Shalitin,O., Martens,H., and Choshniak, I. , 1997. Water transport in the forestomach epithelium of the black Beduin Goat. Zeitschrift fur Saugetierkunde-International Journal of Mammalian Biology 62, 236-237.


Bahat,O., Choshniak, I. , and Houston , D.C. , 1998. Nocturnal variation in body temperature of Griffon Vultures. Condor 100, 168-171.


Jessen,C., Dmi'el,R., Choshniak, I. , Ezra,D., and Kuhnen,G., 1998. Effects of dehydration and rehydration on body temperatures in the black Bedouin goat. Pflugers Archiv-European Journal of Physiology 436, 659-666.


Kasirer-Izraeli,H., Shkolnik,A., and Choshniak, I. , 2001. Kidney response to rapid rehydration in the donkey.Israel Journal of Zoology 47, 29-39.


Sinai,P., Krasnov,B.R., Shenbrot,G.I., and Choshniak, I. , 2003. Ecology and behavior of the lesser Egyptian gerbil (Gerbillus gerbillus) (Rodentia : Gerbillidae) from the Negev Highlands and Arava valley, Israel.Mammalia 67, 1-14.


Brosh1 A , Y. Aharoni , E. Shargal , B. Sharir , and M. Gutman , I. Choshniak   2004. Measurements of energy balance of grazing beef cows in Mediterranean pasture, the effects of stocking rate and season: 2. Energy expenditure estimation from heart rate and oxygen consumption, and the energy balance. Livest. Prod. Sci.90 pp. 101–115


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