The Voyage of the Beagle (1831 - 1836)

Dr. Karobi Moitra

(1809 - 1882)

Who was Charles Darwin?A famous naturalist

Traveled around the world inthe HMS Beagle

Came up with the idea of“Origin of species bymeans of natural selection”

Organisms selected by howfit they were to survive - “Survival of the fittest”

Down House in Kent (England)

How did Darwin get interested in Science &Nature?

As a child his favorite pass times were climbing trees,catching rats, playing with dogs and taking long walksin the country to collect whatever he could find

Charles did not do well at school

At age 13 he and his brother set up a chemistry lab in the tool shed of their garden where he learnt the basics of scientific experimentation

As he grew older he became interested in bird watching,collecting minerals, beetles and taxidermy (collecting andstuffing specimens)

Darwin’s education

1826 his father sent him off to Edinburgh Medical School

He spent his time bird watching, collecting specimenshiking and reading books about nature.

He quit medical school 1 1/2 years later.

Darwin decided he wanted to be a clergyman/naturalist

He passed the final exam with flying colors with the help of Revd. Henslow and dreamed of exploring the tropics.

Darwin the explorer

In 1831 Darwin was offered the position of a naturalistOn the HMS Beagle by Captain Fitzroy

Darwin’s father did not want him to go because he thoughtit would be a “complete waste of time”

Darwin set sail on the HMS Beagle on the 27th of Dec1831

He became seasick immediately and started having second thoughts about the voyage.

The Ship

Darwin’s cabin

The Voyage (1831 to 1836)

Darwin’s specimens

Giant tortoisesLizards

25 species of insects15 new species of fish

Cocoanut crabsCoralBirdsShells

Minerals

And a lot more…….

Darwin’s finches

Adaptive radiation

Species evolve rapidly to exploit any empty eco-space

Adaptive radiation in Darwin’s finches

One ancestral species (ground dwelling seed eating)

Different species evolved in different niches

Origin of species by means of natural selection

Niches exert the selection pressure

The origin of species by means of natural selection

Darwin’s Theory

Large populations Struggle for existence

Struggle for existence Survival of the fittest

Survival of the fittest Natural selection

Natural selection Speciation

Darwin’s book

Published in 1859

Based on principlesoutlined by Wallaceand Darwin in 1858at a presentation onJuly 1st at theLinnean Society

References

http://www.darwin-online.org.uk

http://www.pbs.org

http://www.smccd.net

http://www.natcenscied.org

http://www.AboutDarwin.com