Natural Selection & Sexual Selection: An Illustrated Introduction
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- เผยแพร่เมื่อ 10 ก.พ. 2025
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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.
#birdsofparadise #birdsofpradiseproject #birdofparadise
![จากรุ่นใหญ่สุดรวยในเกม FIVEM สู่การติดคุกแก๊งแตกในชีวิตจริง [สรุปแก๊งOREO]](http://i.ytimg.com/vi/Vjj8EX4qpiU/mqdefault.jpg)
Hail praise to all the people, researchers and binocular-eyed zoologists and patrons that made this video possible.
agreed!
This is such a great video, the amores shield bird reminds me of my gym teacher ☺️☺️🥳🏋️♂️🍀
i love the background music with the combination of the behavior of the individual bird
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.
NOOOO AWKWARD BIRD!!!!!!!!!!!!! my boy....
Glorious your days will become
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).
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 so beautifully made!
Very well explained. Thanks 🙏🏻
She totally missed the opportunity to say "turn the drab to the fab" at the end :(
That was SO great and I loved the animations!
Great video. Why isn't this video open to everybody? I went here through a link on facebook.
very well done
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
ugh this was my hw
+Jazzy Cakes same
HOLY SHIOOOT HI CHEWBACA
+Jazzy Cakes mine toooo
same
What is hw?
2:30
that's a mood
This is soo interesting thank you !. ❤
Fantastic video!
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.
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
Amazing Incredible💫
Mr. Kelly really do be letting us review before the test
were you from wagner highschool?
@@kingxds9715 no
Thanks for this :)
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?
A very good video
thank you for this!
Chingon, no le entiendo nada pero se ve que esta chido
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.
Una belleza! Por favor incorporen traducción al español!
@ 2:30
NOOOO! GET IT IN! :(
Sorry if that was too inappropriate... the illustration is quite humorous...
Simple and easy to understand! nice video! :)
I give it all to you world
love it...
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
Nice
Anyone else watch the wrong video and had to watch this when it's due in 5 minutes? :')
Same lolll
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
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.
8:05
*Pornography*
-Spy (Team Fortress 2 from 2007)
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.
this is hilarious
Under my wing all trades will be safe
This applies to humans too
So basically selfish gene theory?
It’s about personality bro
I would like to see more fancy humans thanks. We're really disappointing out here.
Personal bookmark- 1:46
Abundance for sexual selection
Me lo traducen? :'v
Based & blackpilled.
Not naturally selected
2:05 - 2:10
So this is essentially me
btw im a guy
came here for hw
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.
bro that awkward chick was so depressing
cool now I know I'm a loser at sexual selection
2:35 5:27
Brutal blackpill
long bill
lmfao at the sad bird faces
AIDS