Sea Shore Antics Forum Index Sea Shore Antics
This forum of www.seashoreantics.com is to glean or discuss info on UK sea shore wildlife and their antics, beit what they do, where they do it and why when and how.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

video lecture - seashore - speciation explained with shells.

 
Post new topic   Reply to topic    Sea Shore Antics Forum Index -> Video and Lectures
View previous topic :: View next topic  
Author Message
natalie
moderator


Joined: 24 Oct 2004
Posts: 37
Location: Nearwater

PostPosted: Mon Sep 05, 2005 9:35 am    Post subject: video lecture - seashore - speciation explained with shells. Reply with quote

David Reid is a clear and informative lecturer. Here he explains: How new species are

formed. Why temperate climates have limited variety of species on the sea shore whilst tropical climates are so rich.
Ever since Darwin, these have been among the

great mysteries of evolution. In the sea, the answers to these questions have remained elusive until very recently. David Reid will explain how studies of marine snails at

the Natural History Museum have added new insight.

Link to view lecture:
http://www.nhm.ac.uk/nature-

online/earth/oceans/webcast-speciationinseavid/speciation-in-the-sea.html


Last edited by natalie on Sat Feb 11, 2006 8:23 pm; edited 1 time in total
Back to top
View user's profile Send private message
Melanie



Joined: 25 Oct 2004
Posts: 26
Location: Torbay

PostPosted: Wed Nov 02, 2005 3:12 pm    Post subject: Reply with quote

Would agree he has a clear and logic method of passing on information.

His example of speciation is simple but effective..... on how a

species must have an aspect of recognition, both for us as observers, but also for the species concerned, as they must recognise their own species to mate with.
His

simple example was birds (colour and plumage) how it is fairly obvious, yet if a 'strong wind' blew all feathers off, we, to observe, and the species of birds, to mate,

would have to start looking a little closer for aspects of recognition.
He then neatly goes on to compare with snails (in this case he's talking about tropical marine

ConeShells) and how they look fairly similar and so have developed a method of recognition..... by the shape of their genetalia! That's what he says, honest!

very

good lecture
mel
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Sea Shore Antics Forum Index -> Video and Lectures All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group