Home Mail MemberMap Chat (1) Wallpapers
Go Back   ChiefsPlanet > The Lounge

Reply
 
Thread Tools Display Modes
Old 05-21-2012, 09:43 PM  
Fish Fish is offline
Missing Dick Curl
 
Fish's Avatar
 
Join Date: Sep 2005
Casino cash: $2113090
Science is Cool....

This is a repository for all cool scientific discussion and fascination. Scientific facts, theories, and overall cool scientific stuff that you'd like to share with others. Stuff that makes you smile and wonder at the amazing shit going on around us, that most people don't notice.

Post pictures, vidoes, stories, or links. Ask questions. Share science.

This is in support of the Penny 4 NASA project. If you enjoy anything you learned from this thread, consider making a donation and signing the petition.

http://www.penny4nasa.org/

Why should I care?:


Last edited by Fish; 01-07-2013 at 07:55 AM..
Posts: 24,543
Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.
  Reply With Quote
Old 04-30-2013, 10:33 PM   #736
Fish Fish is offline
Missing Dick Curl
 
Fish's Avatar
 

Join Date: Sep 2005
Casino cash: $2113090
Encourage stem cell research in any manner you are able. So much potential. Look at that kid's smile. We can do this for every single kid with Leukemia if we collectively choose to.

Educate and Inform!


Using her own stem cells, doctors at Children’s Hospital in Philadelphia were able to genetically engineer T-cells to combat Avery Walker’s leukemia. T-cells are part of the immune system that attack B-cells; the cells that turn into leukemia. Avery is the seventh patient to receive this therapy, and the fifth to go into remission.



The seventh child to receive an experimental leukemia therapy at Children's Hospital of Philadelphia got good news last week: It worked.

"Avrey Walker is cancer free!!!! A total remission!" her father, Aaron, exulted on their Facebook page.

The 9-year-old from Redmond, Ore., was diagnosed at age 4 with acute lymphoblastic leukemia, a blood cancer that can be deadly within a few months if not treated.

Like other children in the study at Children's, Avrey had undergone years of intermittent chemotherapy, only to relapse each time the toxic treatments ended.

She was one of the minority of children who do not respond to conventional treatments. Today, with potent chemotherapies and radiation, about 80 percent of the 3,000 children diagnosed annually in the United States are cured. But the treatments are harsh, and when they fail, the options are increasingly grim.

Aaron Walker and his wife, Christal, turned to Children's after reading about Emily Whitehead of Philipsburg, Pa., the first child to receive the hospital's genetically engineered therapy, made using each patient's disease-fighting "T cells." Emily remains in remission, a year after treatment.

Avrey and her parents spent about 50 days in Philadelphia while her T cells were modified, multiplied, and, a month ago, returned to her bloodstream.

"I have heard of miracles like most of us have; however I have never witnessed one in person - until now," Walker said. "We are so thankful!"

The immunotherapy researchers, including Stephan Grupp at Children's and Carl H. June at the University of Pennsylvania, recoil from words like miracle. And they have published results from only the first two children.

Still, the T-cell therapy is showing startling effectiveness, judging from both scientific and parental accounts: Of the first seven children, five had a complete response - no evidence of cancer - although one of them later relapsed. One child did not respond, and one child's outcome has not been made public by parents or doctors.

The therapy involves transferring genes into T cells - the soldiers of the immune system - to make them recognize and attack B cells, the blood component that turns malignant in certain leukemias and lymphomas. There is also evidence that some of the designer T cells develop immune "memory," so they could reactivate and strike if cancer returns.

Recently, this immunotherapy technology has been successfully used in small numbers of patients in studies at Sloan-Kettering Memerial Cancer Center in New York and the National Cancer Institute in Bethesda, Md.

The toxicity of this new approach is not yet clear, and seems to vary. At one extreme, Emily Whitehead nearly died when the T cells threw her immune system into overdrive. Avrey's reaction, in contrast, was unusually mild.

"We were all waiting for the big storm," her father said. "She just felt a little groggy and had a low-grade fever" for about a day.

The durability of the therapeutic effect is also unclear. However, an adult leukemia patient treated at Penn remains cancer-free two and a half years after treatment.

Children like Avrey have never known such a lengthy respite from disease, disability, and dread. Now, her father said, she wants to go back to fourth grade, play softball, hang out with her big sister, Madison.

"We'll try to get back to a normal life," he said, "something we haven't had for 10 years."
__________________
Posts: 24,543
Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.
  Reply With Quote
Old 05-01-2013, 07:56 AM   #737
Baby Lee Baby Lee is online now
Cake Boss!!
 
Baby Lee's Avatar
 

Join Date: Aug 2000
Location: 456 Lick My Butthole Lane
Casino cash: $127656
Quote:
Originally Posted by Fish View Post
Want a free science class?

Yale, Stanford, MIT, Cornell, and many other universities around the world have introduced free open courses in subjects like physics, biology, and chemistry. In many cases, there is a semester’s worth of recorded lectures, along with exams to test your knowledge. If you have ever wanted an Ivy League science education, here’s your chance!

Complete list here: http://bit.ly/10OPhfE

There are TONS of really solid courses. My recommendations would depend on your level of basic fundamentals, such as the full complement of calculus classes, or at least 2 levels of chemistry.

If you are calculus educated, the entry level Physics class is an absolute MUST, as it's ALL on video. The professor has demonstrations, examples and anecdotes that really cement your understanding of the material, and you also get professor's notes, exams and other supplemental materials. But if you've never heard of a Pyonting vector a lot of it will be lost on you.

Others are varying levels of usefulness. Some just have a loose collection of notes, and you'd be just as well served finding a used textbook or even wikipedia.

I find the best ones are the fundamental ones. Statics, Dynamics, Electrical Circuits, Thermodynamics, and Basic and Intermediate Chemistry.

These can be found on

ocw.mit.edu and ItunesU as well.
__________________
#geekyporn - Star Wars, but with ****in' - it's a wokring title #secondseacrest

Last edited by Baby Lee; 05-01-2013 at 09:43 AM..
Posts: 38,708
Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.
  Reply With Quote
Old 05-01-2013, 08:00 AM   #738
Rausch Rausch is offline
MVP
 
Rausch's Avatar
 

Join Date: Aug 2000
Location: Jefferson City, mo., USA
Casino cash: $1219634
Quote:
Originally Posted by Baby Lee View Post
If you are calculus educated, the entry level Physics class is an absolute MUST, as it's ALL on video.
We're pimping online classes on CP here.
__________________
Quote:
"He had no teeth, and he was slobbering all over himself. I'm thinking, 'You can have your money back, just get me out of here. Let me go be an accountant." I can't tell you how badly I wanted out of there."
Denver rookie QB John Elway, on Jack Lambert, after Lambert and the Steelers knocked Elway out of his first game as a pro (1983).
Posts: 48,427
Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.
  Reply With Quote
Old 05-01-2013, 08:11 AM   #739
Cephalic Trauma Cephalic Trauma is offline
Permitted
 

Join Date: Jul 2011
Casino cash: $61186
Big Nasty and boogblaster both PM'd me and told me they've been watching the MIT ones regularly.
Posts: 4,022
Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.Cephalic Trauma is too fat/Omaha.
  Reply With Quote
Old 05-01-2013, 08:14 AM   #740
Rausch Rausch is offline
MVP
 
Rausch's Avatar
 

Join Date: Aug 2000
Location: Jefferson City, mo., USA
Casino cash: $1219634
Quote:
Originally Posted by Cephalic Trauma View Post
Big Nasty and boogblaster both PM'd me and told me they've been watching the MIT ones regularly.
So.........we should expect more of them now!
__________________
Quote:
"He had no teeth, and he was slobbering all over himself. I'm thinking, 'You can have your money back, just get me out of here. Let me go be an accountant." I can't tell you how badly I wanted out of there."
Denver rookie QB John Elway, on Jack Lambert, after Lambert and the Steelers knocked Elway out of his first game as a pro (1983).
Posts: 48,427
Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.Rausch is obviously part of the inner Circle.
  Reply With Quote
Old 05-01-2013, 08:44 AM   #741
Baby Lee Baby Lee is online now
Cake Boss!!
 
Baby Lee's Avatar
 

Join Date: Aug 2000
Location: 456 Lick My Butthole Lane
Casino cash: $127656
Quote:
Originally Posted by Rausch View Post
We're pimping online classes on CP here.
This isn't Vatterott or UofPhoenix. It's a camera in the same class MIT engineering underclassmen have been taking for decades.
__________________
#geekyporn - Star Wars, but with ****in' - it's a wokring title #secondseacrest
Posts: 38,708
Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.
  Reply With Quote
Old 05-01-2013, 09:11 AM   #742
mikey23545 mikey23545 is offline
MVP
 
mikey23545's Avatar
 

Join Date: Aug 2000
Casino cash: $114167
[quote=Baby Lee;9648212]
Quote:
Originally Posted by Fish View Post
Want a free science class?

Yale, Stanford, MIT, Cornell, and many other universities around the world have introduced free open courses in subjects like physics, biology, and chemistry. In many cases, there is a semester’s worth of recorded lectures, along with exams to test your knowledge. If you have ever wanted an Ivy League science education, here’s your chance!

Complete list here: http://bit.ly/10OPhfE


There are TONS of really solid courses. My recommendations would depend on your level of basic fundamentals, such as the full complement of calculus classes, or at least 2 levels of chemistry.

If you are calculus educated, the entry level Physics class is an absolute MUST, as it's ALL on video. The professor has demonstrations, examples and anecdotes that really cement your understanding of the material, and you also get professor's notes, exams and other supplemental materials. But if you've never heard of a Pyonting vector a lot of it will be lost on you.

Others are varying levels of usefulness. Some just have a loose collection of notes, and you'd be just as well served finding a used textbook or even wikipedia.

I find the best ones are the fundamental ones. Statics, Dynamics, Electrical Circuits, Thermodynamics, and Basic and Intermediate Chemistry.

These can be found on

ocw.mit.edu and ItunesU as well.

Unfortunately, my last calculus course was Calculus III, and it was taken about 35 years ago. Thanks to some disastrous life choices, I haven't used it since.

BTW Baby Lee, what line of work are you in that you are so interested in physics courses? I was under the impression you were a barrister.

Just a renaissance man, perhaps..
Posts: 11,525
mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.
  Reply With Quote
Old 05-01-2013, 09:15 AM   #743
Fish Fish is offline
Missing Dick Curl
 
Fish's Avatar
 

Join Date: Sep 2005
Casino cash: $2113090
Scientifically Accurate Ninja Turtles!

__________________
Posts: 24,543
Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.
  Reply With Quote
Old 05-01-2013, 09:18 AM   #744
Baby Lee Baby Lee is online now
Cake Boss!!
 
Baby Lee's Avatar
 

Join Date: Aug 2000
Location: 456 Lick My Butthole Lane
Casino cash: $127656
[quote=mikey23545;9648327]
Quote:
Originally Posted by Baby Lee View Post


Unfortunately, my last calculus course was Calculus III, and it was taken about 35 years ago. Thanks to some disastrous life choices, I haven't used it since.

BTW Baby Lee, what line of work are you in that you are so interested in physics courses? I was under the impression you were a barrister.

Just a renaissance man, perhaps..
Patent Attorney.

Its been told here many times before, so . . . Q, . . I guess

But it's what I always wanted to do. But I went to a liberal arts U that, while I got a great education, the advisors knew nothing about preparing me to be patent bar eligible one day [you need either, a 'hard science' degree, substantial [ie >20 hours] effort in one concerted hard science discipline, or passing the engineering fundamentals exam]. I sucked it up and went into litigation, but I kept getting sucked into Worker's Compensation because I know A LOT about it and its a reliable moneymaker. But it's also the Dilbert of the law. So I went back to get myself Patent Bar eligible. Closing in fast.
__________________
#geekyporn - Star Wars, but with ****in' - it's a wokring title #secondseacrest

Last edited by Baby Lee; 05-01-2013 at 09:25 AM..
Posts: 38,708
Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.
  Reply With Quote
Old 05-01-2013, 09:57 AM   #745
mikey23545 mikey23545 is offline
MVP
 
mikey23545's Avatar
 

Join Date: Aug 2000
Casino cash: $114167
[quote=Baby Lee;9648345]
Quote:
Originally Posted by mikey23545 View Post

Patent Attorney.

Its been told here many times before, so . . . Q, . . I guess

But it's what I always wanted to do. But I went to a liberal arts U that, while I got a great education, the advisors knew nothing about preparing me to be patent bar eligible one day [you need either, a 'hard science' degree, substantial [ie >20 hours] effort in one concerted hard science discipline, or passing the engineering fundamentals exam]. I sucked it up and went into litigation, but I kept getting sucked into Worker's Compensation because I know A LOT about it and its a reliable moneymaker. But it's also the Dilbert of the law. So I went back to get myself Patent Bar eligible. Closing in fast.

I guess can respect a lawyer who is trying to claw his way out of the dark side.

Posts: 11,525
mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.mikey23545 has an IQ even higher than Frankie's.
  Reply With Quote
Old 05-01-2013, 09:59 AM   #746
trang1980 trang1980 is offline
Rookie
 

Join Date: Apr 2013
Casino cash: $600
Úp phụ nè................. nhớ úp lại nha pro, cám ơn hehehehehheeh.........
Posts: 5
trang1980 is disappoint.trang1980 is disappoint.trang1980 is disappoint.trang1980 is disappoint.trang1980 is disappoint.
  Reply With Quote
Old 05-01-2013, 10:02 AM   #747
Barret Barret is offline
Starter
 
Barret's Avatar
 

Join Date: Jul 2004
Location: East Texas
Casino cash: $53998
Ok I found this on "Today I learned" on reddit, but I thought this was kinda cool. It is showing how a flame can conduct electricity.

Posts: 876
Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.Barret would the whole thing.
  Reply With Quote
Old 05-01-2013, 10:04 AM   #748
Baby Lee Baby Lee is online now
Cake Boss!!
 
Baby Lee's Avatar
 

Join Date: Aug 2000
Location: 456 Lick My Butthole Lane
Casino cash: $127656
[quote=mikey23545;9648430]
Quote:
Originally Posted by Baby Lee View Post


I guess can respect a lawyer who is trying to claw his way out of the dark side.

There isn't so much a dark or light side in WC, workers are going to be injured and employers are going to think they're either faking or malingering. That's not going away. It's not that I don't think it's important work, more that it's perfunctory work. Collect medical records, get an independent medical exam, depose the doctors, follow rehab, assemble exhibits, try for settlement based on a VAST history or what similar cases settle for.

Nothing innovative or legally vexing hardly ever arises. Really good claims adjusters could do 90% of it.
__________________
#geekyporn - Star Wars, but with ****in' - it's a wokring title #secondseacrest
Posts: 38,708
Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.Baby Lee is obviously part of the inner Circle.
  Reply With Quote
Old 05-02-2013, 08:59 PM   #749
Fish Fish is offline
Missing Dick Curl
 
Fish's Avatar
 

Join Date: Sep 2005
Casino cash: $2113090
Honeypot ants. ****ed up evolution.....






http://www.thefeaturedcreature.com/2...-ants-for.html

Honeypot ants are the ultimate self-sacrificers. They give up their stunning physique for the good of the colony, which, to me, would be an extremely altruistic act.
What happens is some of the ants are used as living “storage units” full of nectar and honey by gorging themselves on the food until their abdomens become so distended with the substances, that their abdomens actually expand to the size of a grape! These ants, called repletes, will feed the other workers by regurgitating the yummy mixture into the worker’s mouths. Now doesn’t that sound appetizing?

This method of food storage developed because of the climate in which these ants are found. It’s terribly difficult to find vast quantities of food in the desert, and the ants came up with the brilliant solution to store it for when times are tough. Though, the method of storing it does seem a little extreme to me… but hey whatever works for ya.

The native people of Australia have long regarded Honeypot Ants as a welcomed dessert. Nothing like the engorged abdomens of ants for a treat!

Even David Attenborough gets in on the gooey goodness in this BBC clip. Be sure to watch him take a huge bite out of the honey-filled ant – unless you just ate or are about to, then I really wouldn’t recommend it.
__________________
Posts: 24,543
Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.
  Reply With Quote
Old 05-02-2013, 09:25 PM   #750
Fish Fish is offline
Missing Dick Curl
 
Fish's Avatar
 

Join Date: Sep 2005
Casino cash: $2113090
Harsh...

Why Shark Embryos Eat Each Other Up in Utero



Shark embryos cannibalize their littermates in the womb, with the largest embryo eating all but one of its siblings.

Now, researchers know why: It's part of a struggle for paternity in utero, where babies of different fathers compete to be born.

The researchers, who detailed their findings today (April 30) in the journal Biology Letters, analyzed shark embryos found in sand tiger sharks (Carcharias taurus) at various stages of gestation and found that the later in pregnancy, the more likely the remaining shark embryos had just one father.

That finding suggests the cannibalism seen in these embryos is a competitive strategy by which males try to ensure their paternity.

"In some species, the struggle for paternity continues beyond the point where the female [mates with] the male," said study co-author Demian Chapman, a marine biologist at Stony Brook University of New York.

Mini-cannibals

Full-grown sand tiger sharks are approximately 8.2 feet (2.5 meters) long, and mothers typically give birth to two baby sharks, each about 3.3 feet (1 m) long.

Since the 1980s, when detailed autopsies of sand tiger sharks revealed embryos in the stomachs of other embryos, researchers had known that the shark fetuses cannibalized each other in utero about five months into their nearly yearlong gestation. Legend has it that a shark embryo actually bit a researcher's hand during a dissection when the researcher reached into the uterus of the shark's mother, Chapman said.

While 12 littermates may start out the journey, all but one is devoured by the biggest in the pack. That strategy allows sand tiger sharks to have much larger babies at birth than other shark species, making the little ones relatively safe from other predators, Chapman said.

But scientists didn't know why the sharks were cannibalizing each other. One possibility is that females were mating with multiple partners and that the cannibalization helped only one father's genes remain dominant.

To find out, Chapman and his colleagues studied genetic samples from 15 pregnant female sharks that had died in nets off the coast of South Africa. (The nets were put in place to protect swimmers from deadly bites from great white sharks and bull sharks, but the nets occasionally snare and kill sand tiger sharks.)

Paternity struggle

Of those 15 female sharks, 10 of the sharks carried just two embryos, while the remaining five were in an earlier stage of gestation and had five to seven embryos in utero.

The team then used DNA analysis to determine paternity.

"It's exactly the same sort of DNA testing that you might see on Maury Povich to figure out how many dads there are," Chapman told LiveScience.

Those litters with five to seven embryos had at least two fathers (embryos from other fathers may have already disappeared), while the litters with just two sharks more often had just one father.

That suggested one embryo -- possibly the one that grew biggest first -- tended to devour embryos from other fathers over its full siblings.

"Basically, that loser father ultimately provided food for a rival male," Chapman said.

Sexual selection

It's still a mystery exactly what makes one father successful over another, said James J. Gelsleichter, a marine biologist at the University of North Florida who was not involved in the study.

"Sexual selection is very much like an evolutionary arms race, and the males and females are basically one-upping each other," Gelsleichter told LiveScience.

A possibility is that embryos from the first male to fertilize the female simply get biggest first, devouring their littermates.

The strategy could also help females select good mates. Shark mating involves violent biting, so intrauterine cannibalism may allow females to avoid resisting and avoid being "too choosy" about mating, while still ensuring that a high-quality male sires her offspring, Gelsleicther said.
__________________
Posts: 24,543
Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.
  Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -6. The time now is 06:57 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.