John Endler
- January 10, 2024
- Ethologist
Quick Facts
| Full Name | John Endler |
| Occupation | Ethologist |
| Date Of Birth | Aug 10, 1947(1947-08-10) |
| Age | 77 |
| Birthplace | Canada |
| Country | Canada |
| Horoscope | Leo |
John Endler Biography
| Name | John Endler |
| Birthday | Aug 10 |
| Birth Year | 1947 |
| Place Of Birth | Canada |
| Birth Country | Canada |
| Birth Sign | Leo |
John Endler is one of the most popular and richest Ethologist who was born on August 10, 1947 in Canada, Canada.
John Endler Net Worth
| Net Worth | $5 Million |
| Source Of Income | Ethologist |
| House | Living in own house. |
John Endler is one of the richest Ethologist from Canada. According to our analysis, Wikipedia, Forbes & Business Insider, John Endler 's net worth $5 Million. (Last Update: December 11, 2023)
Height, Weight & Body Measurements
John Endler height Not available right now. Satoru weight Not Known & body measurements will update soon.
Who is John Endler Dating?
According to our records, John Endler is possibily single & has not been previously engaged. As of December 1, 2023, John Endler’s is not dating anyone.
Relationships Record : We have no records of past relationships for John Endler. You may help us to build the dating records for John Endler!
Facts & Trivia
Satoru Ranked on the list of most popular Ethologist. Also ranked in the elit list of famous people born in Canada. John Endler celebrates birthday on August 10 of every year.
What did John Endler study?
Endler’s Discovery When evolutionary biologist John Endler began studying Trinidad’s wild guppies in the 1970s, he was struck by the wide variation among guppies from different streams, even among guppies living in different parts of the same stream.
What did guppies evolve from?
Over time, the guppies in places where pike cichlids ate adults evolved to have as many babies as possible earlier in their lifetimes. Guppies in places where killifish ate babies evolved in an opposite way – they had fewer, larger babies later in life.
When was John Endler born?
Born in Montreal in 1947.
What happened when Dr John Endler transferred predatory fish to the
regions with more colorful male guppies?
When Dr. Endler transferred predatory fish to the regions with brightly colored male guppies, selection acted rapidly to produce a population of duller males. This demonstrates that persistent variation within a population provides the raw material for rapid evolution when environmental conditions change.
What hypothesis was Endler testing with this experiment What did he expect
to find if his hypothesis was supported?
Endler’s hypothesis was that predators are responsible for much of this variation among populations. He had noticed that guppies sharing their stream with predatory cichlids had fewer spots than guppies living with Rivulus. Cichlids are ravenous predators of adult guppies. Rivulus eat only juvenile guppies.