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Water and Agricultural Biotechnology

Prof. (Emeritus) Gad Degani

Contact Prof. (Emeritus) Gad Degani

Biology and Physiology of Fish and Amphibians
This field involves research into species of fish and amphibians that are less well known. The areas of research are: reproduction growth and nutrition in nature and behavior. In addition, certain aspects of environmental physiology of species of fish and amphibians are under examination: the objects of this aspect of research is the study of metabolism, and the influence of temperature on growth, the physiological adaptation of amphibians to their environment, in water economy and the control of body fluids under the influence of different environmental conditions of moisture and temperature, especially salinity tolerance and osmoregulation. These are studies in the fields of comparative and environmental physiology.

Nutrition of Fish and Amphibians
This research can be divided into a number of areas. A portion deals with the natural food of animals. Another portion involves efforts to improve the formulation of artificial food for fish (a) through learning the chemical body composition of fish, and from this determining the percentages of its required ingredients; (b) through examining the value of protein in fish food; (c) examining the value of fats,); (d) examining the value of carbohydrates. At present, work in nutrition concentrates on the development of the formulation of food for tropical fish.

The Influence of Hormones on the Growth and Reproduction of Fish (molecular endocrinology)
Current work concerns the steroids and other hormones of fish, and their influence on various processes in fish, in particular growth, body composition, food requirements and enzymatic processes . Particularly worth mentioning is the breakthrough in which Prof. Degani has shown that growth hormones and insulin can be absorbed into the body of the fish through oral administration: up to that time it was thought that whole proteins could not be absorbed into the bloodstream via the gills or the digestive system. Further work on the reproductive system has shown that other proteinous hormones can be administered in the same way, e.g., gonadotropin. Present research work concerns hormonal control of reproduction.

Animals in the Ecological System and Environmental Behavior
Dr Degani's work on the ecology of water systems concentrates mainly on the interrelationship between various animals and their aquatic ecosystems, especially environmental influences such as water quality and food, the prime factors in animal interaction. There is an additional interest in behavioral models of animals in nature, aiming to establish how the animal adapts itself to its environment through its behavior



Ph.D. 1979, Department of Zoology, Tel Aviv University
M.Sc. 1976, Department of Biology, Technion – Israel Institute of Technology, Haifa

Academic and research experience
Since 2008-2013: Chairperson, M.Sc. Program, Department of Biotechnology, Tel Hai College
Since 1998: Professor, Tel-Hai College Faculty of Sciences and Technology
Since 1997: Professor, Faculty of Agriculture, Hebrew University
Since 1986-2011: Scientific Director, MIGAL - Galilee Technology Center
1999 – 2003: Dean of the Faculty of Sciences and Technology, Tel-Hai College
1987 – 1999: Academic Director of Agriculture, Tel-Hai College
1994: Visiting Professor, University of Maryland
1993: Adjunct Professor, East Carolina University, NC
1991: Visiting Scientist, City University of New York, Brooklyn College
1990-2000 Head of Golan Research institute
1983 – 1984: Visiting Scientist, East Carolina University, NC, USA
1981 – 1982: Research Associate, Department of Biology, Technion - Israel Institute of Technology
Since 1979: Lecturer, Tel-Hai College Faculty of Sciences and Technology and researcher at MIGAL - Galilee Technological Center.

Selected Publications

The role of brain peptides in the reproduction of blue gourami males (Trichogaster trichopterus)

Journal of Experimental Zoology Part A: Ecological Genetics and Physiology 2013 Volume 319 Issue 8 Pages 461-470 G. Levy; G. Degani Read online

The DNA Variation of Pseudepidalea viridis (Syn. Bufo viridis) from Various Habitats

Zoological Studies 2013 Volume 58 Issue 18 Pages 1-15 Degani, G., Goldberg, T., Gazith, A., Elorom, E. and Nevo, E.

Involvement of GnRH, PACAP and PRP in the reproduction of blue gourami females (trichogaster trichopterus)

Journal of Molecular Neuroscience 2012 Volume 48 Issue 3 Pages 603-616 G. Levy; G. Degani Read online

Breeding site selection according to suitability for amphibian larval growth under various ecological conditions in the semi-arid zone of northern Israel

Ecologia Mediterranea 2009 Volume 35 Pages 65-74 T. Goldberg; E. Eviatar; G. Degani


Post-graduate and post-doctoral research training


Laboratories and research projects


Business opportunities and technology transfer