Natural Selection & Sexual Selection: An Illustrated Introduction
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- Опубликовано: 4 янв 2025
- Explore more at www.birdsofpara...
How does evolution happen? Through a gradual process called selection. Individuals that are better equipped to survive and reproduce pass those traits to their offspring. These "selected" changes accumulate over thousands of years. We tend to think of natural selection-"survival of the fittest"-but sexual selection works the same way and can be just as strong in shaping how species look and act.
Filmed and photographed by Tim Laman.
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Hail praise to all the people, researchers and binocular-eyed zoologists and patrons that made this video possible.
agreed!
NOOOO AWKWARD BIRD!!!!!!!!!!!!! my boy....
i love the background music with the combination of the behavior of the individual bird
In case of the fancy males, a bit more elaborate explanation so as to "why" would be, that there may be two ways how the fancy traits are relevant for fitness. One option is, that if a male develops useless fancy traits and funny courtship behavior, and still has enough energy and enough capability to survive and escape from predators, that indirectly says, he´s got some very good genes other than those coding for the fancy traits. Another option is, that within the karyotyp, the fancy genes may bond with some high quality genes which are directly relevant for survival and fertility, and are carried onto the next generation together, so the fancy traits then serve as markers of the presence of those highly appreciated genes. Gene interactions that would only enable the development of fancy traits if high quality genes are present, are also possible. Whichever the case, not only males get selected. Females are also subjected to selection, regarding their mating choices. It is easy to see, how the males who can demonstrate their wholesome genetic qualities get preffered, and how females who prefer males who really have some hidden quality behind their fanciness, get also preferred.
This is such a great video, the amores shield bird reminds me of my gym teacher ☺️☺️🥳🏋️♂️🍀
My teacher given me the link to this video to watch and write kinda short essay based on it. Thank God this is not half an hour video and it explained clearly. What a great video! Now I need to start to type something for the essay.
Sounds tough my teachers doing the same thing.
What school are you at? I would never dream this to be teached in my country.
She totally missed the opportunity to say "turn the drab to the fab" at the end :(
This is so beautifully made!
2:30
that's a mood
Glorious your days will become
Great video. Why isn't this video open to everybody? I went here through a link on facebook.
Beautiful video, thanks for sharing!
One note: sexual selection is practically part of signal selection. The main question in this case is why some treats are more attractive than others? The reason is that they are more attractive because they honestly present how good is the male comparing to other males, as explained in the handicap principle, or honest signaling (different name for the same principle).
That was SO great and I loved the animations!
Very well explained. Thanks 🙏🏻
Thank you for making this, it is very helpful for my study
I feel so bad for the armored bird! Poor bird couldnt get it on XD
The problem is.. you didn't explain how akward, armor shield, and Long bill could exist on the first place?
Yeah they did, around 1:33 - genetic recombination or mutation result in variation.
@@LustStarrr no, they just assuming that mutation create those three. But how? They didn't explain it.
@@yasfi5196 - I think those were just a couple of examples they chose to illustrate the point, when in reality, variations could take countless different forms.
very well done
but if you have a mutation but that mutation is not dominant, wouldnt it just die out anyway? Like if you had blue eyes and so the females chose you, but all the females had black eyes, wouldnt all the offspring have black eyes?
ugh this was my hw
+Jazzy Cakes same
HOLY SHIOOOT HI CHEWBACA
+Jazzy Cakes mine toooo
same
What is hw?
Mr. Kelly really do be letting us review before the test
were you from wagner highschool?
@@kingxds9715 no
Fantastic video!
@ 2:30
NOOOO! GET IT IN! :(
Sorry if that was too inappropriate... the illustration is quite humorous...
Does this mean that a female 'fancy' is probable? if so would the males mate with her? because she is carrying the fancy genes?
I believe its the females choice in ghis case
Rae Mel ohhh right of course, thanks :D
سيكس اطول قضيب
صفه قم حل حر حر
would you mind if i use parts of this video for non money educational purposes? in mexico. thanks, obiuosly i will mention you in th credits :) good day and what a brilliant channel you have.
This is soo interesting thank you !. ❤
Amazing Incredible💫
Its selection. They dont have to 'know if it works'. The males with non useful traits and females that chose those mates get selected against. The males with useful traits and females that chose them get selected for. If a males has certain colors that mean they produce more of a vitamin, and another has a color that means he produces less of a vitamin, the females that have a tendency for the 'useless color' will be selected against, leaving only females that want the good color. I think.
Had this idea as well. Tricky thing is that you'd have to consider that which allows for the selection of "good colour" as being heritable. You have to see it as a particular trait but pinpointing that isn't as straight forward as novel observable traits. It might be a complex system that won't be as immediately inherited as the traits its selecting. Remember that not every trait has the same heritability even if it does have genetic elements to it.
Thanks for this :)
thank you for this!
The first time I watched this, it was in the middle of the night, and all I could think about through the whole video was, ha, ha, funny bird
Personal bookmark- 1:46
Simple and easy to understand! nice video! :)
The reason given for the burly and fancy traits not to be passed on to the female were not adequate. They cannot simply choose the traits that will or will not benefit them. In fact, in some species the male and female are virtually identical.
Una belleza! Por favor incorporen traducción al español!
but why only females choose ? and why only males combat rivals ?
Because female reproduction is limited by num of eggs and is expensive in terms of the energy required. So it matters to the females to be picky if she's investing so much. Males on the other hand, can produce tons of sperm so they have better reproductive chances with less investment.
@@shakiraquinones6230 Exactly. If there are 5 males and 5 females in a room a female can only have one offspring in 9 months. One male could have 5 offspring in 9 months, so it makes sense from a point of natural selection and passing down the best traits that the females select the best candidate among them. Woman are the limiting factor and thus have the power....at least before the sex
A very good video
8:05
*Pornography*
-Spy (Team Fortress 2 from 2007)
Chingon, no le entiendo nada pero se ve que esta chido
Nice
love it...
So basically selfish gene theory?
this is hilarious
Anyone else watch the wrong video and had to watch this when it's due in 5 minutes? :')
Same lolll
It’s about personality bro
I give it all to you world
Not naturally selected
Me lo traducen? :'v
This applies to humans too
2:35 5:27
Under my wing all trades will be safe
Abundance for sexual selection
wait I don't understand. How can birds just get more elaborate because it works? Things don't just happen because we want them to. So how can good traits become better over time. O wait... mutation right?
Yes, mutation, recombination..variation happens.
I would like to see more fancy humans thanks. We're really disappointing out here.
Based & blackpilled.
2:05 - 2:10
So this is essentially me
btw im a guy
long bill
cool now I know I'm a loser at sexual selection
came here for hw
bro that awkward chick was so depressing
Brutal blackpill
AIDS
lmfao at the sad bird faces