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Author Topic:   Galapagos finches
nator
Member (Idle past 2288 days)
Posts: 12961
From: Ann Arbor
Joined: 12-09-2001


Message 26 of 104 (84699)
02-09-2004 11:18 AM
Reply to: Message 21 by Tamara
02-09-2004 10:02 AM


quote:
And even if all toy poodles were dispatched to a desert island (I can dream, no? where they could only breed among themselves because no corgis were available, that still would not make them a separate species, don't you think?
Not at first, but give them a couple of million years and and some climate change, perhaps some competition from other small carnivores, etc.
Speciation is not a sure thing, but it is not impossible.
BTW, you do know that we have seen speciation in real time in organisms that reproduce rapidly enough for us to see it, right?

This message is a reply to:
 Message 21 by Tamara, posted 02-09-2004 10:02 AM Tamara has not replied

  
nator
Member (Idle past 2288 days)
Posts: 12961
From: Ann Arbor
Joined: 12-09-2001


Message 67 of 104 (86249)
02-14-2004 8:27 AM
Reply to: Message 51 by truthlover
02-10-2004 9:33 AM


quote:
writes:
Maybe someone can name for me a species that varies in size and appearance as much as dogs do, yet are all considered one species (rather than one genus).
Horses.
http://www.petbypet.com/horse_breeds.htm
"The smallest horse on record, a Falabella miniature pony, stood 48 cm (19 in), or just under 5 hands, and weighed 14 kg (30 lb). The largest horse on record was a Belgian that stood 1.8 m (6 ft) tall, or 18 hands, and weighed 1,450 kg (3,200 lb)."
Remember, horse height is measured at the whithers, or the top of the shoulder blades where the back and neck meet.

This message is a reply to:
 Message 51 by truthlover, posted 02-10-2004 9:33 AM truthlover has replied

Replies to this message:
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