Friday, November 13, 2009

Name The Female Baby Sumatran Orangutan!

The Philadelphia Zoo's Sumatran orangutans, Tua and Sugi, welcomed their first baby last month. I've blogged about the announcement and press release here at Prancing Papio.


 Tua and her baby. Photo from Philadelphia Zoo.

Now the Philadelphia Zoo is giving you an opportunity to name this female orangutan baby by voting on the names available on the zoo's website. Personally, I'm partial to the name "Batu" because it's cute. Also because both her parent's names are two syllable as well. The baby orangutan debuts with her mother to the public on Thursday, Nov 12th. Click here for more photos of Tua and her baby from 6ABC.


A closeup photo of Tua and her baby. Photo from 6ABC.

Thursday, November 12, 2009

The Kipunji Might Have Interbred With Baboons

The kipunji (Rungwecebus kipunji) was first known to science in 2003 when it was found dead in a farmer's trap near the forest of Mount Rungwe in Tanzania. Kipunji is geographically restricted to two small populations, Tanzania's Southern Highlands and Udzungwas Mountains. These endangered forest-dwelling monkeys have a very interesting history in their genetic makeup.


The kipunji. Photo from National Geographic by Tim Davenport.

Using fecal sample from Udzungwas Mountains (the Ndundulu population) and two tissue sample from Southern Highlands population, researchers from the National Evolutionary Synthesis Center (NESCent) were able to reconstruct the genetic relationships between these two populations and the kipunji's closest relative (Roberts et al., 2009). They found that the Ndundulu population retains the true Rungwecebus mitochondrial genome while the Southern Highlands population has a distinct mitochondrial haplotype that are basal to the genus Papio and Rungwecebus. This suggests that the Southern Highlands population is a hybrid and might have interbred with baboons while the Ndundulu population did not. The study also suggests that Rungwecebus is a separate genus and is more closely related to Papio than to Lophocebus, Theropithecus, Cercocebus or Mandrillus.

Census shows that there are about 1,100 individuals left in the wild. Of these, only 100 of them lives in Udzungwas Mountains. Losing the population from Udzungwas Mountains means that we will lose the genetic makeup of a true Rungwecebus.

Read more on National Geographic "Africa's rarest monkey may have bred with baboons".

References:

Davenport, TRB. Stanley, WT. Sargis, EJ. De Luca, DW. Mpunga, NE. Machaga, SJ. Olson, LE. 2006. A New Genus of African Monkey, Rungwecebus: Morphology, Ecology, and Molecular Phylogenetic. Science 312(5778) 1378 - 1381 DOI: 10.1126/science.1125631

Roberts, TE. Davenport, TRB. Hildebrandt, KBP. Jones, J. Stanley, WT. Sargis, EJ. Olson, LE. 2009. The biogeography of introgression in the critically endangered African monkey Rungwecebus kipunji. Biology Letters Retrieved November 12, 2009, from http://rsbl.royalsocietypublishing.org/content/early/2009/10/29/rsbl.2009.0741.abstract?papetoc

Sunday, November 8, 2009

Contagious Yawning in Geladas

Over at Beast Ape & The Bleeding Heart Baboons blog, Beast Ape discusses about contagious yawning in geladas.

This research suggests that the yawning contagion is associated with the ability to attribute mental states to others (and possibly empathy). Among non-human mammals, contagious yawning has been demonstrated in chimpanzees (Pan troglodytes), stump-tailed macaques (Macaca arctoides), and domestic dogs (Canis familiaris).

Read more about that blog post here.

Friday, November 6, 2009

Photo of the day: Prospect Park's Hamadryas baboons

November's unpredictable weather always make me sick, plus the stress from studying for GRE this year is not helping either. Don't really have time to do another blog post until Sunday so I figure I'll share with you a photo of me and Pam, one of the female hamadryas baboons from The Prospect Park Zoo. She usually sits on the ledge, pressed next to the display glass, when I do my observation there. Sometimes she would actually sit behind me to hide from rowdy zoo patrons (you know, the ones that like to bang on the glass to agitate them). Or maybe she's just trying to hide from me, heh. Pam's actual name is Kobo (according to the zoo) but I gave these hamadryas a different set of names for easy identification.

Anyways, if you ever visit The Prospect Park Zoo, Pam is the female hamadryas baboon with a very short tail. Don't forget to say hi to her but PLEASE don't bang on the glass ... she hates it.

Pam looking at me, lamenting about rowdy zoo patrons.

Tuesday, November 3, 2009

Homosexuality: Was Darwin Wrong On Sexual Selection?

The article "The effeminate sheep and other problems with Darwinian sexual selection" by Jonah Lehrer was published in the June/July 2006 issue of SEED magazine. It's been circulating around the internet this past week after news broke that a high school teacher from Piasa, Illinois was suspended for giving his students this article to read as an optional class discussion. Soon, a Facebook group was created by students from Southwestern High School in support of their beloved teacher, Dan DeLong. The author of the article, Jonah Lehrer, also showed his support on his blog The Frontal Cortex. DeLong had since been given his job back after he publicly apologize for handing out an age inappropriate article. This whole outburst just screams homophobia to me. It is a disgrace to the country's education system because a thought provoking and queer-friendly curriculum resulted in someone being suspended. I bet none of the parents would even complain if their kids were given an article explaining the extinction of dinosaurs were due to them being late to Noah's ark.


Dinosaurs, Left Behind. Illustration from CartoonStock.

Anyway, back to the article. Joan Roughgarden, a Biology professor from Stanford University thinks that Darwin got it wrong about sexual selection. She also thinks that sexual theory is still stuck in the 19th century.


 Joan Roughgarden's book Evolution's Rainbow.


Two female bonobos having sex. Bonobos are fully bisexual, they don't really care which gender they are having sex with.

Sexual selection cannot explain homosexuality in over 450 different vertebrate species, said Roughgarden. Homosexuality, long thought to be deviant and serves no purpose biologically, is actually normal and a necessary fact of life.. Her book, Evolution's Rainbow, is an attack on Darwin's theory of sexual selection citing that the pervasiveness of homosexuality in the animal kingdom is actually adaptive and had not been weeded out by natural selection. She also said that homosexuality is a necessary side effect for getting along: a necessary feature of advanced animal communities that require communal bonds to function.


 Gay mallards Anas platyrhynchos. Photo from Wikipedia.

An example of this in the primate societies are the Japanese macaques (Macaca fuscata).

Japanese macaques, an old world primate, illustrate this principle perfectly. Macaque society revolves around females, who form intricate dominance hierarchies within a given group. Males are transient. To help maintain the necessary social networks, female macaques engage in rampant lesbianism. These friendly copulations, which can last up to four days, form the bedrock of macaque society, preventing unnecessary violence and aggression. Females that sleep together will even defend each other from the unwanted advances of male macaques. In fact, behavioral scientist Paul Vasey has found that females will choose to mate with another female, as opposed to a horny male, 92.5% of the time. While this lesbianism probably decreases reproductive success for macaques in the short term, in the long run it is clearly beneficial for the species, since it fosters social stability. “Same-sex sexuality is just another way of maintaining physical intimacy,” Roughgarden says. “It’s like grooming, except we have lots of pleasure neurons in our genitals. When animals exhibit homosexual behavior, they are just using their genitals for a socially significant purpose.

Read more about Jonah Lehrer's "The effeminate sheep and other problems with Darwinian sexual selection" here.



"And Tango Makes Three". A storybook based on the real story of Silo and Roy, two gay chinstrap penguins from Central Park.

I think homosexuality in primates is an interesting yet often times a taboo topic. There should be more studies on the effect of homosexuality in primate societies. Are there differences and similarities between primate and human societies when it comes to homosexuality? I also think its about time to regard homosexuality as adaptive as opposed to maladaptive and start coming up with research to see how societies benefit from homosexuality. We already have the "Grandmother Hypothesis" so what about the "Gay, Lesbian and Transgender Family Member Hypothesis"?


Actor Rosario Dawson and her gay uncle, Frank. Poster from PFLAG.

What struck a cord for me was Roughgarden's explanation of homosexuality, “Same-sex sexuality is just another way of maintaining physical intimacy ... It’s like grooming, except we have lots of pleasure neurons in our genitals. When animals exhibit homosexual behavior, they are just using their genitals for a socially significant purpose".

Reference:

Lehrer, J. 2006. The effeminate sheep and other problems with Darwinian sexual selection. SEED Retrieved November 3, 2009, from http://seedmagazine.com/content/article/the_gay_animal_kingdom/