I'm currently taking an ecology class in my university and your 7 min video basically summed up what we had learned in 5 two-hour lecture sessions. Thanks!
@pawan2528
7 жыл бұрын
Harambe was r-selected
@3ofusdonnsanlaca
12 жыл бұрын
I laughed to myself when I was compared to the graph "most of you are going to survive that first day... make it through your teenage years and your middle ages and eventually you are all going to drop off and all of you are going to die in these last 15 years" Good old biology, it'll never let you forget that the end is coming
@thaolong4482
5 жыл бұрын
4 years in college and why did i just finally discovered your video and channel?! Your explanations are amazing thank you!
@avo8479
7 жыл бұрын
learnt more about ecology in this video than my prof could do in 10hrs
@CCRoxtar
6 жыл бұрын
Clarification: the K stands for a German word, Kapazitätsgrenze, which translates to English as "carrying capacity."
@suleymankhan5298
3 жыл бұрын
Informative, Thanks
@InfectiousFrostbite
9 жыл бұрын
You were very clear with your explanations, and I was able to understand everything you said. Thank you so much!
@ward5464
5 жыл бұрын
Mr. Anderson is the only reason I’ll pass my test lol
@umartemiraliev8862
3 жыл бұрын
golden words
@creatorhunterwildlifefishe7388
2 жыл бұрын
This is why women should not receive education
@hunkarun
3 жыл бұрын
Although I knew what K & r selected organisms were, I still found the technical explanation informative. Thanks for the video.
@amandev7371
7 жыл бұрын
Chameleon is K selected. Thank you so much sir... This was quick and crisp.
@dariserodriguez
10 жыл бұрын
Great video but I wish he would have mentioned the difference between density dependent and density independent species
@paintmoore
9 жыл бұрын
I love your lectures always fully understand after. Thank you.
@Mohamedddiop
12 жыл бұрын
great timing, I am studying this for my final exam and you published it today.
@Tia61744
11 жыл бұрын
Great video easy to understand and follow, I am a biology student and this helped to simplify this topic and this is great as a supplement to classroom lecture. Thanks, very helpful. Make more.
@meditationstorytime
10 жыл бұрын
Great video, thanks. Explained a lot that I couldn't find in my textbook. Very professional.
@enukwuthankgod4913
8 жыл бұрын
Thank you. The lectures were comprehensive and clear.
@rendelnicolas7981
5 жыл бұрын
Thanks for the video now i can answer my exam about r/k theory. I'm from the Philippines
@AlexWilliams-bv7vm
9 жыл бұрын
Your videos are always great! Thank you!
@Superduperscribble
9 жыл бұрын
Thank you thank you! Saved my grade. I'm so glad to have a flat B!
@jessicamoore7373
9 жыл бұрын
Awesome video--- great examples. Would you say that r-selected species are more likely to have a reproductive pattern of semelparity while K-selected species are more likely to exhibit iteroparity?
@loveyou957
9 жыл бұрын
+Jessica Moore That is a correct assumption.
@rafaeisenlohr
11 жыл бұрын
you never cease to save my life!!
@Ghosteo
3 жыл бұрын
Thanks for great video, it was super helpful.
@PNguyen16
5 жыл бұрын
wonderful explanation! very helpful
@pastimepursuit7212
3 жыл бұрын
Yea, Mr. Anderson was right. If you could answer the question at the beginning you got the idea and most of it. Skip to 6:03 to learn something you didn't probably know.
@SuperSmugFace
12 жыл бұрын
what do you think of humans going towards r selection, where they mass produce and little attention are given to them. What are some of the positive outcomes from this? it is for an essay I am writing.
@HumbleFishStix
4 жыл бұрын
I'd like to see that essay if you ever wrote it
@Joel-oe7ud
4 жыл бұрын
3:10 is it just me or did anyone else start feeling saaad
@JoeSapp-z2j
Жыл бұрын
A very well-taught lesson on a very flawed concept that is still way too persistent in textbooks. Ecologists have moved away from this framework long ago, like in the 80's. It would be great if you ended the lesson by acknowledging the shortcomings of the r/k paradigm.
@kalmanjulianne
2 ай бұрын
Could you please enlighten me on the name for such diverse reproductive strategies within the same species? For instance, some Homo sapiens choose to have one or two children, investing significant resources in each, while others opt for multiple offspring with different partners, providing minimal resources per offspring. Would both scenarios be considered examples of K-R selection strategy, despite similar lifespans in both instances? Thank you. Kal.
@mrinaliniroy6221
5 жыл бұрын
Sorry 2 say but "r" is the intrinsic rate of increase of an organism of d population or the maximum biotic potential..or to say clearly it's the maximum number of offsprings born per individual of a population when resources are not limited in case of exponential growth.. Growth rate is dn/dt
@thetchild3016
2 жыл бұрын
I have never watched a more explained video in my life ..
@1963sdc
11 жыл бұрын
Good video, however I feel that the last slides imply that r-selected species only exist in unstable environments and K in stable. Both exist in both but r strategists are more susceptible to change.
@rosepawlyszyn5432
9 жыл бұрын
thank you!! Easy to understand and to the point!!
@LoveRadishes
7 жыл бұрын
I am ... SO GRATEFUUUUUL !!! FOR THIS VIDEO!! THANK YOU ! :D
@jjcrazi
12 жыл бұрын
It's in the newest edition of a biology textbook we're using, so i guess it is still relevant
@sajidalinonari9141
4 жыл бұрын
Good noon Mr. Anderson I hope you are fine. The purpose to contact u is that kindly through light on limitation of r and k selection as well as relationship with biogeography. Thanks
@laibanoor9906
9 жыл бұрын
Thank you. I really liked it.
@akasfe1
9 жыл бұрын
I LOVE YOU. That was simple and easy
@shantiajohnson3881
6 жыл бұрын
Thank you so much that was very helpful.
@devonscope6222
5 жыл бұрын
You're a fantastic teacher. I wish you could teach me about the stock market lol
@rumaauddy5988
2 жыл бұрын
Thank you ..it was really clear.
@preferencefeza6761
6 жыл бұрын
I really appreciate your help your videos are very helpful 👍👍👍👍👍
@WeSnapple
12 жыл бұрын
excellent description, thanks
@Lily-fw6hb
5 жыл бұрын
Hi, after watching your video for my class i have began to be more curious about what animals fall under the K or r selected species. one of the animals that i am very confused for what they fall under are chipmunks, they have both features of both selected groups. so would they be continuum? It would be awesome if you could help. Thank you!!
@nedgey
12 жыл бұрын
The wikipedia page suggests r & K selection is not really academicallyrelevant anymore... Or is it that it has just been updated to focus on survivorship? I'm looking at the human K continuum, or differential K theory. You suggest that it's not relevant for humans, but there is that difference between those of us who have, for example, fewer offspring with more parental care, or many offspring with less parental care...
@litojonny
12 жыл бұрын
mr .anderson im curious do you have a ph.d in biology or something?
@vuyaniis9906
9 жыл бұрын
brief and precise, Thank you!!!
@duncan7489
4 жыл бұрын
Great video very informative
@TheChosenOne._.
Ай бұрын
Great video, tysm.
@agdoombagdoom8540
3 жыл бұрын
Just want to say thank you
@hunkarun
3 жыл бұрын
I would actually argue "r" is female type reproduction whereby high fecundity is crucial which explains why in most r selected animals the females are bigger than the males i.e. insects, fish, some reptile species. However, in K selected animals, it's the male-male competition that drives the sexual reproduction to evolve into higher more complex form of organisms i.e. mammals & birds. In short, sexual reproduction and males, that "drive" organisms to become more highly evolved life forms i.e. moving from r to K form of reproduction. Males are somewhat the "prime mover" in sexual reproduction so to speak.
@aldoushuxley5953
4 жыл бұрын
Is the survivorship curve not based on environment? Early humans had many more infant death. You could have argued, that they are a type 3 species
@anushabhattacharyya876
5 жыл бұрын
You are a life saver!
@parthrathod8811
3 жыл бұрын
It's very helpful for me 😊
@lenoxx877
10 жыл бұрын
Supper helpful!! thank you :)
@pickler_pickler
Жыл бұрын
Does this apply within human populations as well?
@emilysaysmeowx3
7 жыл бұрын
What trees live thousands of years ? Red woods?
@decembersavage-brown8435
11 жыл бұрын
Thank you. Very helpful
@hurshithavasudevan8698
4 жыл бұрын
You are superb!
@James3_1999
3 жыл бұрын
Thank you 🙏🏼
@pauldrice1996
11 жыл бұрын
...and eventually they all die.
@shalabinuha
11 жыл бұрын
Thanks it's really helpful
@ganga6102
3 жыл бұрын
Thanks Sir.
@NanaQ365
11 жыл бұрын
very helpful~ thank you!
@kamerondonaldson5976
Жыл бұрын
i wish humans could reproduce the same way bacteria do sometimes and use sex for nonreproductive purposes.
@drd6482
3 жыл бұрын
I'm at my carrying capacity for Term One, bring on the holidays
@drd6482
3 жыл бұрын
#hermitcrabs
@edgaravila2776
8 жыл бұрын
How did you people make this political
@dirtyharrycat6639
8 жыл бұрын
Modern slave owners use knowledge of the spectrum between r and K to push their fiat plantations toward r selection, in order to divide the human family and place themselves in positions of power. It's obviously political.
@HamPilgrimBL
7 жыл бұрын
Read a book called "The Evolutionary Psychology Behind Politics". there's a relation between R-K Selection and politics.
@nat_han
7 жыл бұрын
It's kind of sad honestly, to treat humans as animals...
@Ibian666
7 жыл бұрын
We are animals. Yes, you too.
@RobynneMerguerdijian
7 жыл бұрын
Pseudosciences have a penchant for mal-appropriated notions they never seriously studied, but instead latched onto in order to illustrate a prejudice. This politicized bull shit appropriating r/ K select into an innate genetically implanted voter tendency, which isn't really demonstrated that n various political environments in dictatorships or essentially liberal (economic definition) conditions, where people actually tend to militate in their political preferences.
@rubygloommel
11 жыл бұрын
I'd say that for most humans it's going the opposite way, with fewer children that get a lot more care over a longer period of time than in the past (for example children usually stay at home with their parents longer and don't get married as early as in the past), although it's true that in some places, especially areas with low use of contraceptives/low awareness of contraceptives, or families with poor incomes that can't support children over a long time there is a leaning towards rselection
@wolfpack4128
6 жыл бұрын
rubygloommel resources are becoming more scare which favors both parents providing as much as possible to a small number of offspring. Places like Africa are still using R based selection and the results are threatening the entire world. What happens when they run out of resources there. We'll see them on boats trying to cross into Italy to get to where more resources exist. Question for the K selection people will be what do we do? Can we let them in and trust they will switch to K mindset or will they eat their way through the K type hosts until an international crisis is created. These always lead to massive catastrophic events (plagues and wars).
@nyanliyi_4444
Жыл бұрын
u made my lifeee easssyy!!
@chimericalical
3 ай бұрын
Irem is R Selected.
@melissaturcotte7032
8 жыл бұрын
great explanation! thank you!! I went my entire semester of ecology not knowing the difference haha now I get it :)
@savleshubladze6435
6 жыл бұрын
Are there any animal familys wich hase R and K selections?
@sarakamali6535
8 жыл бұрын
thanks, it was clear
@phreshbrocoli
8 жыл бұрын
can humans be r-selected?
@DigiLychee
8 жыл бұрын
+phreshbrocoli Yes, search this on youtube "r k selection humans"
@jadjabado5
8 жыл бұрын
+phreshbrocoli well it just depends on how much we reproduce because we are unpredictable so if we have a person that reproduces a lot "player" then he is r-selected but when someone has a family and takes care of them then its k-selected, so for us i would say that it just depends on the person's actions and what he/she decides to do.
@josuebarboza9809
8 жыл бұрын
silly liberals.
@sandro5535
8 жыл бұрын
Left wing politics is r-selective while right/conservative is more K-type. In short K is equality of opportunity while r is equality of outcome.
@sandro5535
8 жыл бұрын
K people can very well get more children as r.types tend to support abortion and birth control as they love free sex. K people can also well have more sex as they prefer stable relationships.
@mustafaaloglu2186
4 жыл бұрын
hi, it's mr.andersen
@vegan4theanimals2
11 жыл бұрын
Brilliant!
@leginorizwanhakimibinnoraz4588
4 жыл бұрын
thanks a lot!
@Zombmn
12 жыл бұрын
THANKYOU THANKYOU THANKYOU
@drquantum6548
7 жыл бұрын
can a human be R-type?
@william4042713
11 жыл бұрын
THANKYOU!!!
@JamTeo
11 жыл бұрын
Thank you :)
@lHurtYourFeeIings
4 жыл бұрын
N is for you know what.
@cookwithvrata3349
6 жыл бұрын
Thank u
@heinaung2654
9 жыл бұрын
Better than my teacher...
@kelsielewis3331
10 жыл бұрын
You are awesome
@rubygloommel
11 жыл бұрын
there's not really many advantages to r selection for humans as the population is already growing far quicker than we can support it. There's economic advantages and disadvantages (e.g. less money spent on education, but then less educated adults in the population). You could take a look at some of the argument in 'Brave New World' for mass fertilisation of a single egg and stuff like that - but that's really heading into the realm of science-fiction rather than real life
@Marsheh2
11 жыл бұрын
thanks! :)
@kevin71127
11 жыл бұрын
awesome. so we could say that r selected species follow a type 3 curve, while K species follow a type 1 curve? What about the sea turtle? is that type 2?
@Herp234
5 жыл бұрын
Sea turtles are usually type 3. They have a high nest mortality. Usually around 80-90%
@cranberrypie101
11 жыл бұрын
very helpfuls
@Jasminemakeupxoxo
9 жыл бұрын
OH MY GOD THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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