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Lecture 5

BIO SCI 1A Lecture Notes - Lecture 5: Second Voyage Of Hms Beagle, Linnean Society Of London, Thomas Robert Malthus


Department
Biological Sciences
Course Code
BIO SCI 1A
Professor
R.Symanski
Lecture
5

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Some Darwin Notes
Darwin
Educational background
o Had gone to Divinity School at Cambridge
o Was a keen naturalist
o Class attended?
o Self-perception
o Key trait: persistence, and dedicated
Beagle Voyage
o The H.M.S. Beagle Journey
o A 5 year ship journey around the world
o He got on the ship through family connections, he was supposed to entertain the
captain during the journey
o Aim 1: expand knowledge of natural resources
o Aim 2 (captain’s): find evidence for biblical account of life
o Darwin’s “bible”
o What Darwin found on journey
Chile: marine shells inland
Argentina: armadillo-like animal: glyptodant
o What else did Darwin do?
Collected specimens - data, data, data - at every opportunity
Used comparative method
Comparisons between Europe and what he saw
Saw importance of distance in accounting for differences
o The Galapagos Visit (1835)
Nature of islands
Island-mainland comparisons
Darwin’s two hypotheses
1. Dispersion from mainland
2. Differential island evolution
The famous finches now known as Darwin’s finches
Ground-dwelling finches
Tree-dwelling finches
Woodpecker finches
Darwin’s Return and Subsequently
o Concludes that evolution is a “fact”
o Also concludes that mechanism producing change is natural selection
o Thomas Malthus influence
A priest+economist, said that we could multiply infinitely, but we do not
have enough food/resources
o 1844 essay and then long gestation - did not publish yet
Darwin’s Hand is Forced
o Letter from Alfred Russel Wallace
Wallace had the same ideas as Darwin, so Darwin was like oh sht i
should probably publish my stuff so I can be #1
o Who was Alfred Russel Wallace?
Travels in the Amazon and the Malay archipelago
Wallace’s biogeographic regions of the world
o Joint presentation before Linnean Society, July 1, 1858
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find more resources at oneclass.com
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