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Evolution: Accepted Articles
June 16, 2011
9:23 pm
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Stefan
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Evolution
Accepted Article (Accepted, unedited articles published online for future issues)

TESTING FOR DIFFERENCES IN RATES OF SPECIATION, EXTINCTION, AND MORPHOLOGICAL EVOLUTION IN FOUR TRIBES OF CICHLIDS ENDEMIC TO LAKE TANGANYIKA, EAST AFRICA

Abstract: http://onlinelibrary.wiley.com.....oi/10.1111...1390.x/abstract

QUOTE
ABSTRACT
Patterns of morphological disparity yield important insight into the causes of diversification and adaptive radiation in East African cichlids. However, comparisons of cichlid disparity have often failed to consider the effects that differing clade ages or stochasticity may have on disparity before making interpretations.Here, a model of branching morphological evolution allows assessment of the relative contributions of differing turnover and morphological change rates, clade ages, and stochastic variation to the observed patterns of disparity in four endemic tribes of Lake Tanganyika cichlids. Simulations compare the likelihood of generating the observed disparity of the four tribes using 200 parameter combinations and four model conditioning variations, which allows inference of evolutionary rate differences among clades. The model is generally robust to model conditioning, the approach to data analysis, and model assumptions. Disparity differences among the first three cichlid tribes, Ectodini, Lamprologini, and Tropheini, can be explained entirely by stochasticity and age, whereas the fourth tribe, Cyprichromini, has likely experienced lower rates of turnover and morphological change. This rate difference is likely related to the low dietary diversity of the Cyprichromini. These results highlight the importance of considering both clade age and stochastic variation when interpreting morphological diversity and evolutionary processes.

June 17, 2011
9:20 am
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ender2811
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Hey Stefan,
I have a small favor to ask. Could u maybe take the time to explain to a newb what it is exactly u guys do in this part of the forum. Are u looking for papers or sharing them or just bringing them to the attention of other members?

June 17, 2011
9:22 am
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Stefan
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Sharing and bringing them to people's attention so they can get them because they know they are there. When requests are made it's always pointed out in the threads/posts.

June 17, 2011
9:39 am
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ender2811
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KK, thanks.

June 17, 2011
1:00 pm
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Stefan
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You're welcome. What I'd actually like is to discuss the science here but so far no luck /wink.gif" style="vertical-align:middle" emoid=";)" border="0" alt="wink.gif" />

June 17, 2011
1:39 pm
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ender2811
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Yea, seems like it.
Noble effort my friend, don't give up. Sooner or later some creationists are bound to join the forum. That should sprout up a lively debate nice and quick. Science rocks.

June 17, 2011
5:05 pm
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Graham Ramsay
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QUOTE (Stefan @ Jun 17 2011, 01:43 PM) < {POST_SNAPBACK}>
You're welcome. What I'd actually like is to discuss the science here but so far no luck /wink.gif" style="vertical-align:middle" emoid=";)" border="0" alt="wink.gif" />

How can I read the full article Stefan? Difficult to discuss something just from the abstract.

June 17, 2011
6:05 pm
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Stefan
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QUOTE (mummymonkey @ Jun 17 2011, 06:48 PM) < {POST_SNAPBACK}>
How can I read the full article Stefan? Difficult to discuss something just from the abstract.

I was talking about this forum section in general, not about this or any paper in particular.

June 19, 2011
8:25 pm
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Matt
Málaga, Spain
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Anyone want this paper?

Incidentally, I currently use this forum mostly for getting hold of new papers and am happy with that. If we want to encourage scientific discussion we perhaps need to think about the formatting of it?

Cake or death?
June 19, 2011
8:46 pm
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Stefan
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Hmmm, yeah...discussing the science might be too far...

June 19, 2011
9:10 pm
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Matt
Málaga, Spain
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Oh that wasn't what I meant - just that we should maybe have separate sections for listing new papers and discussion, respectively. /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

Cake or death?
June 19, 2011
9:23 pm
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Stefan
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QUOTE (Matt @ Jun 19 2011, 10:53 PM) < {POST_SNAPBACK}>
Oh that wasn't what I meant - just that we should maybe have separate sections for listing new papers and discussion, respectively. /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

I don't see why?

June 19, 2011
9:41 pm
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Matt
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Because under the current format the forum appears to be simply a list of papers and as such may not be immediately recognisable as a scientific discussion forum despite its title.

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