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!
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
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.
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.
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.
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.
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.
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
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?
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.
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
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.
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.
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.
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...
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!!
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
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).
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
+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.
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.
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?
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Mr Anderson has such a copious amount of swag.
true
he really does
He really really does
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!
Harambe was r-selected
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
4 years in college and why did i just finally discovered your video and channel?! Your explanations are amazing thank you!
Clarification: the K stands for a German word, Kapazitätsgrenze, which translates to English as "carrying capacity."
Informative, Thanks
learnt more about ecology in this video than my prof could do in 10hrs
Although I knew what K & r selected organisms were, I still found the technical explanation informative. Thanks for the video.
You were very clear with your explanations, and I was able to understand everything you said. Thank you so much!
Mr. Anderson is the only reason I’ll pass my test lol
golden words
This is why women should not receive education
Chameleon is K selected.
Thank you so much sir...
This was quick and crisp.
Great video but I wish he would have mentioned the difference between density dependent and density independent species
great timing, I am studying this for my final exam and you published it today.
Thanks for the video now i can answer my exam about r/k theory. I'm from the Philippines
Great video, tysm.
I love your lectures always fully understand after. Thank you.
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.
I have never watched a more explained video in my life ..
Thank you. The lectures were comprehensive and clear.
3:10 is it just me or did anyone else start feeling saaad
Thank you thank you! Saved my grade. I'm so glad to have a flat B!
Great video, thanks. Explained a lot that I couldn't find in my textbook. Very professional.
you never cease to save my life!!
Your videos are always great! Thank you!
It's in the newest edition of a biology textbook we're using, so i guess it is still relevant
thank you!! Easy to understand and to the point!!
excellent description, thanks
Thanks for great video, it was super helpful.
Thank you ..it was really clear.
wonderful explanation! very helpful
brief and precise, Thank you!!!
Just want to say thank you
You are a life saver!
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.
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.
Thank you. I really liked it.
Thank you 🙏🏼
Thank you so much that was very helpful.
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.
Thank you. Very helpful
I really appreciate your help your videos are very helpful 👍👍👍👍👍
You are superb!
Great video very informative
You're a fantastic teacher. I wish you could teach me about the stock market lol
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.
I'd like to see that essay if you ever wrote it
I LOVE YOU. That was simple and easy
I am ... SO GRATEFUUUUUL !!! FOR THIS VIDEO!! THANK YOU ! :D
Thanks Sir.
Brilliant!
Thanks it's really helpful
It's very helpful for me 😊
THANKYOU THANKYOU THANKYOU
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
THANKYOU!!!
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?
+Jessica Moore That is a correct assumption.
thanks, it was clear
Supper helpful!! thank you :)
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.
very helpful~ thank you!
thank you!!!
u made my lifeee easssyy!!
I'm at my carrying capacity for Term One, bring on the holidays
#hermitcrabs
"All of you are going to die" 🥲 his so real
You are awesome
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
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.
...and eventually they all die.
great explanation! thank you!! I went my entire semester of ecology not knowing the difference haha now I get it :)
i wish humans could reproduce the same way bacteria do sometimes and use sex for nonreproductive purposes.
How did you people make this political
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.
Read a book called "The Evolutionary Psychology Behind Politics".
there's a relation between R-K Selection and politics.
It's kind of sad honestly, to treat humans as animals...
We are animals. Yes, you too.
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.
Thank u
cool beans #gordonramsey #hermitsaregone #fishimmeninent #yeahboi
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...
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!!
very helpfuls
thanks! :)
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
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).
Does this apply within human populations as well?
OH MY GOD THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
mr .anderson im curious do you have a ph.d in biology or something?
Better than my teacher...
GRIM #deadhermits #yeahboi #tired #stickinsectsarestillalivethereishope #headcount
Are there any animal familys wich hase R and K selections?
goood job
omg thanks a lot
What trees live thousands of years ? Red woods?
hi, it's mr.andersen
And so
really nice video
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
can humans be r-selected?
+phreshbrocoli Yes, search this on youtube "r k selection humans"
+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.
silly liberals.
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.
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.
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
Your mouse tricked me
Irem is R Selected.
Thank you mr bozeman
can a human be R-type?
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?
Sea turtles are usually type 3. They have a high nest mortality. Usually around 80-90%
Thank you, blonde Cillian Murphy in glasses with a soothing voice!
hi rooney
You know what else is r selected? Chicken nuggets...