Amotz Zahavi
Encyclopedia
Amotz Zahavi (born 1928 in Petah Tikva
) is an Israeli evolutionary biologist, a Professor Emeritus at the Zoology
Department of Tel Aviv University
, and one of the founders of the Society for the Protection of Nature in Israel
(known as the "SPNI"). His main works are in the evolution of signals, particularly those that indicate fitness, and their selection.
, a biologist.
, which explains the evolution
of characteristics, behaviors or structures that appear contrary to the principles of Darwinian evolution in that they appear to reduce fitness and endanger individual organisms. Evolved by sexual selection
, these act as signals of the status of the organism, functioning to e. g. attract mates. He expanded it with theories on honest signalling
and the idea that selection would favour signals that impose a higher cost, those that are not easily cheated on.
Petah Tikva
Petah Tikva known as Em HaMoshavot , is a city in the Center District of Israel, east of Tel Aviv.According to the Central Bureau of Statistics, at the end of 2009, the city's population stood at 209,600. The population density is approximately...
) is an Israeli evolutionary biologist, a Professor Emeritus at the Zoology
Zoology
Zoology |zoölogy]]), is the branch of biology that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct...
Department of Tel Aviv University
Tel Aviv University
Tel Aviv University is a public university located in Ramat Aviv, Tel Aviv, Israel. With nearly 30,000 students, TAU is Israel's largest university.-History:...
, and one of the founders of the Society for the Protection of Nature in Israel
Society for the Protection of Nature in Israel
The Society for the Protection of Nature in Israel , or SPNI, is an Israeli non-profit environmental organization working to preserve plants, animals, and natural environments that represent bio-diversity, by protecting the lands and waters needed for their survival, and is Israel's oldest and...
(known as the "SPNI"). His main works are in the evolution of signals, particularly those that indicate fitness, and their selection.
Biography
Amotz Zahavi received his Ph.D from Tel Aviv University in 1970. He is married to Avishag ZahaviAvishag Zahavi
Avishag Kadman-Zahavi is an Israeli professor emeritus of Plant Physiology at The Volcani Center for Agricultural Research, Bet-Dagan, Israel...
, a biologist.
Scientific career
Zahavi is best known for his work on the handicap principleHandicap principle
The handicap principle is a hypothesis originally proposed in 1975 by biologist Amotz Zahavi to explain how evolution may lead to "honest" or reliable signaling between animals who have an obvious motivation to bluff or deceive each other...
, which explains the evolution
Evolution
Evolution is any change across successive generations in the heritable characteristics of biological populations. Evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.Life on Earth...
of characteristics, behaviors or structures that appear contrary to the principles of Darwinian evolution in that they appear to reduce fitness and endanger individual organisms. Evolved by sexual selection
Sexual selection
Sexual selection, a concept introduced by Charles Darwin in his 1859 book On the Origin of Species, is a significant element of his theory of natural selection...
, these act as signals of the status of the organism, functioning to e. g. attract mates. He expanded it with theories on honest signalling
Signalling theory
Within evolutionary biology, signalling theory is a body of theoretical work examining communication between individuals. The central question is when organisms with conflicting interests should be expected to communicate "honestly"...
and the idea that selection would favour signals that impose a higher cost, those that are not easily cheated on.
Awards
In 1980, Amotz Zahavi, together with the Society for the Protection of Nature in Israel and two other colleagues, was awarded the Israel Prize for SPNI's special contribution to society and the State, for the environment.Published works
- Zahavi, A. (1975) Mate selection - a selection for a handicap. Journal of Theoretical Biology. 53: 205-214.
- Zahavi, A. (1977) The cost of honesty (Further remarks on the handicap principle). Journal of Theoretical Biology. 67: 603-605.
- Zahavi, A. and Zahavi, A. (1997). The handicap principle: a missing piece of Darwin's puzzle. Oxford University Press. Oxford. ISBN 0-19-510035-2