evolution
pharyngula | December 17, 2008Here's an interesting new blog, Moneduloides, that seems to have an emphasis on human evolution, if you're into that sort of thing, and it currently has a short list of good texts for Christmas presents. <moan> I've done absolutely no Christmas shopping at all this year, so if the economy tanks and my family hates me, it is all my fault. I just have to get out from under this stack of grading first.
grrlscientist | December 15, 2008tags: evolution, honeyeaters, Meliphagidae, Mohoidae, birds, ornithology, birds, molecular phylogeny, extinct species, South Pacific Islands
Two nectar-feeding birds from Hawai'i, the kioea (brown-streaked, in middle) and an o'o species (lower left), looked so much like nectar specialists from the western Pacific (two species on right) that taxonomists put them all in the same honeyeater family, the Meliphagidae. All the Hawaiian birds are unfortunately extinct, but DNA evidence shows that their resemblance resulted from convergent evolution, because the Hawaiian birds were actually much…
ddobbs | December 15, 2008Carl Zimmer faces the wrath with cheerful good humor.
The source of his troubles:
grrlscientist | December 15, 2008tags: Your Inner Fish, Tiktaalik, evolution, streaming video
This wonderful music video is about Tiktaalik, sung by the Indorfins. [3:51]
gregladen | December 14, 2008Three videos:
Thanks to Stacy for the tip on the first of the three. The next two were sort of obvious after that...
evolvingthoughts | December 14, 2008
Just a couple of days ago I mentioned the Annual Review of Ecology, Evolution, and Systematics. They must have heard me because today I get my email notification that they have published this year's volume. I'd like to mention three papers of interest to me. Alas, children, if you don't have a library subscription (or a personal one), you won't be able to access these papers directly...
To start with the last one first, here's a paper (Coates et al.) that discusses the history and biology of the relationships of early tetrapods - organisms with four limbs, backbones, and bony skeletons. We…
grrlscientist | December 14, 2008tags: Birdbooker Report, bird books, animal books, natural history books, ecology books
"One cannot have too many good bird books"
--Ralph Hoffmann, Birds of the Pacific States (1927).
The Birdbooker Report is a special weekly report of a wide variety of science, nature and behavior books that currently are, or soon will be available for purchase. This report is written by one of my Seattle birding pals and book collector, Ian "Birdbooker" Paulsen, and is edited by me and published here for your information and enjoyment. Below the fold is this week's issue of The Birdbooker Report which…
awild | December 13, 2008From an interview with E. O. Wilson:
[Q:]Are ants better at anything than humans?
[Wilson:] Human beings have not yet made an accommodation with the rest of lifeâwhereas ants, whose history dates back more than 100 million years, have achieved that balance, mostly by specializing among the 14,000 known species in terms of where they live, what they eat, and how they relate to other species. Each, for the most part, has acquired a balance with prey, food, and space, halting population growth before it crashes. Ants have reached some degree of sustainability, while humans have not. We're not…
evolvingthoughts | December 12, 2008
There is a widespread tendency of biologists to overgeneralise from their study group of organisms to the whole of biology. Sometimes this is because the organisms are model organisms, like Drosophila (the "fruit flies" that have been used in genetics since the beginning).Other times it is because specialists tend to overestimate the generality of their results and domain. The recent trend to finding "speciation genes" is an example. For some time now various researchers like Chung-i Wu and his collaborators have sought speciation genes. These are genes that cause speciation, in a general…
evolvingthoughts | December 12, 2008I received a query from reader Jodi, of Nova Scotia (I so want to visit there one summer) about how to learn about a scientific subject as a layperson. Of course being a philosopher I was able to answer her quickly, but readers may wish to comment more authoritatively and knowledgeably, as we know philosophy is not bound by little things such as facts. This comes from a comment I made in my talk recently about getting one's theory of evolution from Dawkins or Gould... [Now there's a red rag to a certain curmudgeonly bull in Toronto]. Below the fold:
Jodi wrote:
Hi there,
My name is Jodi ...,…
clock | December 12, 2008Evolution: Education and Outreach, Volume 1, Number 4, is a thematic issue - 26 articles on the Evolution of the Eye. It's Open Access so you can download and read all the articles.
clock | December 12, 2008Ideas in Ecology and Evolution is a new Open Access journals which is also experimenting with the review process.
Bob O'Hara and commenters go into details. I hope it does not end like Medical Hypotheses: a great source of blog-fodder for snarky bloggers and not much else. We'll keep an eye....
evolvingthoughts | December 11, 2008... shh, not so loud or everyone will want one.
Here's a piece by Darksyde at Daily Kos in which he reports the outgoing EPA chair (who has overseen all manner of bad science and decisions, although that may not be his own fault) as saying
"It's not a clean-cut division [between evolution and creation]. If you have studied at all creationism vs. evolution, there's theistic or God-controlled evolution and there's variations on all those themes."
It seems to me that theistic evolution is not exactly about God controlling evolution, although there may be plenty of biblical warrant for God…
grrlscientist | December 11, 2008tags: evolution, avian clutch size, ornithology, birds, avian
The Little Tinamou, Crypturellus soui,
usually lays two eggs in a small depression on the forest floor.
Image: Cagan Sekercioglu [larger view].
Anyone who has ever watched birds closely or who has bred them in captivity knows that different species of birds have different clutch sizes, with some species laying only one egg while others produce as many as ten eggs per clutch or more. Why is there such a tremendous difference in clutch size? What evolutionary factors affect the average clutch size that each species produces?…
razib | December 11, 2008A lot of evolutionary psychology goes into the "They did a study on what?" category. So check out Daniel Kruger's paper, Male Financial Consumption is Associated with Higher Mating Intentions and Mating Success:
Cross-culturally, male economic power is directly related to reproductive
success. Displays of wealth and social status are an important part of human male mating effort. The degree of male financial consumption may be related to variance in life history strategies, as differences in life history patterns are fundamentally differences in the allocation of effort and/or resources.…
pharyngula | December 11, 2008
I made a mistake that was quickly corrected by a correspondent. Yesterday, in writing about copy number variants in human genes, I used the example of the amylase gene on chromosome 1, which exists in variable numbers of copies in human populations, and my offhand remark was that the effect is "nothing that we can detect", but that maybe people with extra copies would be "especially good at breaking down french fries". Well, it turns out that we can detect this, that there was even a very cool study of this enzyme published last year, and that the ability to break down complex starches…
pharyngula | December 10, 2008
The Institute for Creation Research has a charming little magazine called "Acts & Facts" that prints examples of their "research" — which usually means misreading some scientific paper and distorting it to make a fallacious case for a literal interpretation of the bible. Here's a classic example: Chimps and People Show 'Architectural' Genetic Design, by Brian Thomas, M.S. (Note: this is not the peer-reviewed research paper implied by the logo to the left — that comes later.) The paper is a weird gloss on recent work on CNVs, or copy number variants. Mr Thomas makes a standard creationist…
oracknows | December 10, 2008
I have to wonder if the most famous denizen of the Discovery Institute in medical circles, Dr. Michael Egnor, is on vacation or something. For some reason, he's been especially active over at the Discovery Institute's repository of pseudoscience, Evolution News & Views, over the last couple of weeks. Neurosurgeons tend to be very busy people, more so even than a humble breast cancer surgeon like me, and few are as motivated as I am to blog. Yet, these days Dr. Egnor's been flooding EN&V with more of his blather than I've seen him do in a long time, maybe ever.
It's times like these…