Prof. (Emeritus) Gad Degani

Prof. (Emeritus) Gad Degani
Principal Investigator
Water and Agricultural Biotechnology

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.

Scientific Publications

Damage to Salamandra infraimmaculata Populations by Human Activity in Creating Water Pits Is a Death Trap in Semi-Arid Habitats.

Degani, G., Grosman, U., Goldberg, T., Hanegbi, N.
Open J. Anim. Scien. 2019 Volume 9 Pages 23-34

Ecological and Genetic Variation of the Distribution of Various Species of Amphibians at the Southern Border of their Distribution.

Degani, G
Int J Plant Anim Environ Sci. 2019 Volume 9 Pages 21-41

Sex-related gonadal gene expression differences in the Russian sturgeon (Acipenser gueldenstaedtii) grown in stable aquaculture conditions.

Degani G, Hurvitz A, Eliraz Y, Meerson A.
Animal Reproduction Sci. 2019 Volume 200 Pages 75-85

The Fire Salamandra (Salamandra infraimmaculata) and the Banded Newt (Triturus vittatus) along the southern border of their distribution.

Degani, G.

Vitellogenesis in Blue Gourami is Accompanied by Brain Transcriptome Changes.

Degani, G., Alon, A. Hajouj, A. and Ari Meerson, A.
Fishes 2019 Volume 4 Issue 4 Pages 54

Oocytes Development in the Fry of Blue Gourami, Trichogaster trichopterus.

Degani, G.
Intern. J. of Zool. Invest 2018 Volume 4 Issue 1 Pages 11-20

Genetic Variation in Xeric Habitats of Triturus vittatus vittatus (Urodela) Using Mitochondrial DNA of 12S and16S, and Nuclear Gene, Rhodopsin, on the Southern Border of its Distribution.

Degani, G.
Intern. J. of Zool. Invest. 2018 Volume 4 Pages 31-40

Ecological, Biological and Genetic Adaptation to Xeric Habitats of Salamandra infraimmaculata on the Southern Border of Its Distribution

Degani, G.
Open Journal of Animal Sciences 2017 Volume 7 Issue 1 Pages 70-92

Ecological, Biological, Behavioral and Genetic Adaptation to Xeric Habitats of Triturus Vittatus Vittatus (Urodela) on the Southern Border of its Distribution

Degani, G.
J Marine Sci. Res. Dev. 2017 Volume 7 Issue 226

Evidence of a Reproduction-Related Function for Brine Kisspeptin2 and its Receptors in Fish Trichogaster trichopterus.

Degani, G., Alon, A., Stoler, A. and Bercovich, D.
Intern. J. of Zool. Invest. 2017 Volume 3 Issue 2 Pages 106-122

Steroids Controlled by Various Hormones Influence Oogenesis and Spermatogenesis of the Model Fish, Trichogaster Trichopterus (Anabantidae, Pallas).

Degani, G.
In Sex Steroids ,2017, Ed. ,Avid Science Publication , Pages in press

Transcription of Insulin-like Growth Factor Receptor in Russian Sturgeon (Acipenser Gueldenstaedtii) Ovary During Oogenesis

Degani, G., Yom-Din, S., Hurvitz, A.
Universal Journal Agricultural Research 2017 Volume 5 Pages 119-124

Vitellogenin Level in the Plasma of Russian Sturgeon (Acipenser gueldenstaedtii) Northern Israel.

Degani, G., Hurvitz, A and Levavi-Sivan, B.
J. Marine. Sci. Res. Dev. 2017 Volume 7 Issue 6 Pages 1-4

Male Blue Gourami (Trichogaster trichopterus) Nest-Building Behavior Is Other Males and Females

Degani, G., Bar Ziv M.
Open Journal of Animal Sciences 2016 Volume 6 Pages 195-201

Oogenesis control in multi-spawning blue gourami (Trichogaster trichopterus) as a model for the Anabantidae family

Degani, G.
Internal Journal of Scientific Research 2016 Volume 5 Pages 179-184

The Habitats, Life Cycle and Physiological Adaptation of Green Toad The (Pseudepidalea viridis) in Northern Israel

Degani, G.
Internal Journal of Scientific Research 2016 Volume 5 Issue 5 Pages 113-117

The Relationship between Quality of Teaching and Student Evaluations: The Case of an Academic Course in Endocrinology

Degani, G.
Voice of the Publisher 2016 Volume 2 Issue 3 Pages 13-17

A Model of Hormonal and Environmental Involvement in Growth and Sex Differentiation in European Eel (Anguilla anguilla)

Degani, G.
Advances in Biological Chemistry 2016 Volume 6 Issue 4 Pages 141-145

Cannibalism, among Other Solutions of Adaption, in Habitats Where Food Is Not Available for Salamandra in fraimmaculata Larvae Diet in Breeding Places in Xeric Habitats

Degani, G.
Open Journal of Animal Sciences 2016 Volume 6 Issue 1 Pages 31-41

Gonadotropins in the Russian Sturgeon: Their Role in Steroid Secretion and the Effect of Hormonal Treatment on Their Secretion

Yom-Din, S., Hollander-Cohen, Joseph Aizen, J., Boehm, B., Shpilman, M., Golan, M., Hurvitz, A., Degani, G. Levavi-Sivan, B.
PLoS One 2016 Volume 13 Issue 11 (9) Pages 1-23