Mechanisms of Natural Selection Part 1: Types of Sexual Selection

[@stevencorey7623]

What do you think Kent? Kent: I wasn’t prepared for that

[@user-jy3tr1rv8v]

Lol

[@stevencorey7623]

Andre Gon Lol. my bad.

[@impofstpete727]

Matt Ridley wrote about a lot of this in The Red Queen. A group of researchers took a group of swallows that chose male mates based on the length of tail feathers and artificially lengthened some of them while shortening others. The males with the extra long feathers had great difficulty flying but were also mating more.

[@DivinumX]

I originally found and followed your channel because of your debunking videos but I find myself staying because of videos like these.

[@sgtJOOSEcapeS]

Thanks for the breakdown THAT 🤔other none doctor Guy think evolve means flying to evade predators🤦.... I show my children your videos and they enjoy it and they sing your intro at times .. great show

[@thegoodlydragon7452]

Flight probably evolved because some webbing in the arms can break a fall to a degree. Eventually those webbed or feathered fall-breaking arms are useful enough to glide. Then if they can be flapped in the right way they can prolong gliding or even help you tread air. Eventually, they become fully-fledged flight organs. Look at the flying squirrel and sugar glider. Under the right set of pressures, over enough generations they could become something more like a bat.

[@Tan6erine]

I really like your intro

[@seasong7655]

Peacock is the ultimate simp species. It's proven by bateman's principle.

[@ZENMASTERME1]

I would definitely disagree, the average progressive leftist is unequivocally the undeniably ultimate SIMP! This has been proven by the hundreds of thousands of videos documenting the daily life of these SIMPS. 👍🏾

[@mads4it555]

What does the Seafood Import Monitoring Program have to do with anything?

[@thomasneal9291]

@@ZENMASTERME1 you like to pretend you have a life, don't you. it's pretty easy to see you don't though. just keep that in mind.

[@jacobbeitner8796]

Batman’s principle you mean

[@Dr.IanPlect]

Peacock isn't a species, it's a sex (female, peahen). The species is peafowl.

[@JennaHasm]

Can you make a video or provide the link to differen types of crickets mating strategies? There was a video, but was deleted. I can not find the research papers on this.

[@yingzhou8548]

I have a question- Why, when you breathe in does your chest fall, and when you breathe out, does your chest rise? Shouldn’t it be the other way around? Please answer.

[@caviramus0993]

It's opposite as you are saying. When we take a breath our chest expands and when we exhale the chest falls.

[@mads4it555]

@Ying Zhou mate, you are doing it wrong... ... And it's not just your chest, your whole upper abdomen should lift when you breathe in. If only your chest is lifting then you are breathing too fast and shallow, and not getting a good enough amount of time for gases to exchange. Hope that helps 😉

[@scptime1188]

Because air increases the volume of your chest, witch makes it go up, and visa versa. I used to think this as a kid too, since i imagined that sucking in air would suck in your chest, and exhaling would involve pushing your chest out. :/

[@Guidus125]

The crazy thing about all this is that this video couldve been about 21st century humans. All these principles are still present in modern day society. No matter how sophisticated we consider ourselves to be, the primal forces of evolution are stronger than anything

[@Guidus125]

@Maria Salinas - The concept of a 'golddigger' - The stereotype of a middle-aged man who cheats on his wife with a 'pretty young thing'. - The fact that almost the entire tiktok/instagram industry revolves around pictures/videos of attractive women. - The fact that make up is almost exclusively worn by women and not men. - The fact that rape exists and unfortunately probably will keep existing ^Just a few examples of modern day concepts that can easily be tied to the principles of natural selection discussed in this video.

[@user-pk9qo1gd6r]

basics of sexual selection in humans: females don't choose me

[@rohitadigam2466]

It depends on the amount of money in ur account 🤑🤑🤭

[@subschallenge-nh4xp]

Cus u are russian

[@subschallenge-nh4xp]

Trum takes then all

[@SangheiliSpecOp]

@悲哀G.o7 ruthless

[@safapresley]

U need to take a shower

[@michaelhart7841]

I need some more debates videos from u. U control ur angry towards ignorance so good its funny as hale . Great videos. Need more people like u

[@Killbayne]

Interesting video!

[@rayanallouzi8806]

Literally did a natural selection paper today for my biology class

[@rhvette]

Two downvotes? Who did Hovind con into giving the other one?

[@pranavlimaye]

His creepy second account

[@Schneeregen_]

Calling a Peacock a *male* Peacock is kind of redundant as all Peacocks are male, females are called Peahens and the species are called Peafowl.

[@mads4it555]

Yeah but many people might'nt have known that if they had not have been taught or enquired about the Peacock species beforehand... I knew, as my Grandfather bred them and he mostly let them loose on his property, although he did have a massive breeding pen in a big orchard as well. He actually kept and bred lots of rare and unusual birds also. Peafowl are 1 of my top 3 birds... the other two are the Cassowary and the English or Common Kingfisher (Alcedo atthis). If I ever have the space again, I would have peacocks also. I do find the Cassowary intriguing though... it's like an actual living breathing Deinonychus!

[@Daesma999]

I'm just learning these terms and it actually makes sense since we have roosters (aka cocks) and hens..

[@vegatronld]

Sexually Dimorphic..... New words.... Dave always hitting us with shit to look up lol.... Im still recovering from the"motor protein tubular mobility"........ That was the deepest rabbits hole , I ever went down..thanks Dave.

[@appletechpro4u506]

T f

[@thegoodlydragon7452]

You don't need to look it up. He explained the meaning in the video.

[@vegatronld]

@@thegoodlydragon7452 ya he did... I'm an artist...and Dave inspired some of my art and helped me understand covalent bonding... I talked to Dave a few times and he's guided me down some good paths to get some good art ideas from science driven inspiration.

[@alphawtel3157]

Professor Dave can the direction of velocity alone change without change in its magnitude in uniform acceleration

[@pranavlimaye]

What you said happens in "Uniform Circular Motion". The velocity keeps changing direction. It's magnitude remains the same. However, the acceleration (always directed to the centre) keeps changing direction too. Not sure whether that counts as "uniform acceleration"

[@rajeevsrivastava3829]

Mannnnn , sorry I mean , professorrrrrrr. Do you even take rest ? You are dedicated as heaven. ( I wanted to say hell but that would be too negative so I replaced it with heaven 😁) I hope you reply. ; )

[@rajeevsrivastava3829]

@@Oussama-sabouh I also have the dream to become a astronaut , and I too have a huge interest in astronomy.

[@Kerry.moynihan.intellectual]

I have been given the exhibition for some time now that there is some sort of correlation between "looking like" someone/something and sexual preference, and that ultimately this virtue out-rules all other characteristics. The interesting part of this theory is that so many other organisms that rely on phenotypic features in mate selection, and I am curious as to just how many humans base their selection process solely on looks (man-made concepts such as the Media often encourage viewing life this way). There is also the neurological factor that can distinguish appeal amongst sex. It's not one that I can agree with per se, but it's just an interesting theory.

[@thegoodlydragon7452]

You say looks appeal is a man-made construct, but I'm gonna hazard a guess and say that the men you've pursued or been receptive to the advances of have all been at least somewhat taller than random chance would predict and probably didn't have bug eyes or rounded jawlines.

[@daisanchez6205]

Can u keep talking? I was hooked on your comment. I too wonder how many mates are selected based on looks….the single motherhood rates amongst the African American community comes to mind asap. Our women are over sexualized, bred, and left then told to choose better across multi generations. I can only help but theorize sex was had bc there was attraction and nothing more

[@lc285]

Peacocks were used as an alarm system on a farm. Isn't survival based on gene splicing desirable traits?

[@ProfessorDaveExplains]

That's not really a sentence that makes sense.

[@mads4it555]

No, peacocks would be no good on a farm as an intruder alert as they screech all the time, regardless... You are confused with geese. Geese make excellent intruder alerts and are great guard dogs too. They are not afraid to chase anyone off their property... and you don't wanna find out how much it hurts if you don't run fast enough!

[@Insane3OB]

@@mads4it555 I like Duck Foie Gras Mousse with Port Wine Pate. That includes geese right?

[@matthewatowe2009]

This might be off topic but what's the difference between evolution and adaptation?

[@MihaiManuta]

Adaptation is the ability of an existing organism to cope with relatively minor changes, during it's lifetime. For example, if your job changes from a desk job to construction work, your body will adapt developing stronger muscles, increases in respiratory apparatus, etc. all favorable to your new environment. Evolution is the accumulation of genetic changes over long periods of time, changes that are favorable to *reproduction.* Often such changes are synonymous with longer life, but not always. An example would be the pygmy population in Africa that evolved smaller stature over time due (probably) to smaller quantities of available food.

[@Moribus_Artibus]

What happened to your long hair!?

[@ProfessorDaveExplains]

Cut it in 2018.

[@pablolopez3166]

@@ProfessorDaveExplains Hi professor. I'm still watching your videos. Congrats on the 1M milestone, btw. Tons of love

[@willdemeyer6397]

Every single one of those animals knows that the earth is NOT flat!!

[@mads4it555]

Why are you raising Flerfdom on an evolution video?

[@SigmaElement]

Male peacock is more likely to deive away predators from its female countrrpart

[@Planarwalk]

So if I have a big flashy fabulous tail, I will be more attractive to potential mates... 🤔🤔🤔 I think I've understood this video how it was intended to be understood.

[@thomasneal9291]

this was a bit too rushed. I normally take an entire week to teach this in all the biology courses I ever taught. it's rather central principle for students to be able to grasp how we move from the older notions of natural selection being focused on "survival", to the more accurate focus on fitness.

[@ProfessorDaveExplains]

This is a three part series.

[@mobiyus3282]

Well, we're not actual biology students taking an actual biology class, but just some people watching a YT vid to be entertained. I don't actually want a week long video. Three 10-15 min videos about it looks just about perfect

[@sarikavishwakarma2235]

🍫🍫

[@lohphat]

Hmm. I wonder how sea lions select a mate without the use of too much beer.

[@2ahdcat]

C'mon Dave... show us YOUR tail feathers ;)

[@schifoso]

I would like to be reborn as a male elephant seal.

[@kaziem]

8th

[@babarazamsucks]

First!

[@user-jy3tr1rv8v]

Nope

[@kevcroft2815]

Dave, you didn't learn anything from your debate (destroying of) Kent Hovind did you?

[@ProfessorDaveExplains]

I learned that he's an even bigger con man than I originally imagined.

[@himanshutahiliani1235]

Oh just fuck off, Kev, will ya.

[@kevcroft2815]

@@himanshutahiliani1235 Well you're not a happy teddy bear are you?!

[@kevcroft2815]

@@ProfessorDaveExplains Amen to that!

[@himanshutahiliani1235]

@@kevcroft2815 😂😂😂

[@cagrant4472]

Long-winded lecture unnecessary. Male peacock tail ornate and beautiful , , ,because peahen likes big showy tail, mates with peacock with biggest, showiest tail. Generations following, same thing. End of story, no lecture.

[@ProfessorDaveExplains]

Um, yes, lecture. There is plenty more to discuss than that overly reductive statement.