These species are characterized by having only a few offspring but investing high amounts of parental care. Elephants, humans, and bison are all k-selected species . ... R-selected species can include mosquitos, mice, and bacteria.
What is an example of an R selected species?
Examples of r-selected species include pest organisms , such as rodents, insects, and weeds.
Are humans an R selected or K-selected species is it even possible to neatly classify humans into one category Why or why not?
Elephants, humans, and bison are all k-selected species . ... These species often have short life expectancies, produce as many offspring as they can, and invest very low amounts of parental care. R-selected species can include mosquitos, mice, and bacteria.
Which species is most r selected?
You can see r- and K-selected strategies clearly by looking at different organisms within a phylogenetic group, such as the mammals. For example, elephants are highly K-selected, whereas mice are much more r-selected. Among the fishes, most, like the salmon , are r-selected.
Which animals are a r selected species?
Typical examples of r-species are mice, rabbits, weeds and bacteria , which have a lot of offspring, but a short life expectancy. Examples of organisms undergoing K-selection are tortoises, elephants, people, and sequoia trees
What is the R vs K theory?
In ecology, r/K selection theory relates to the selection of combinations of traits in an organism that trade off between quantity and quality of offspring . ... In contrast, more stable environments allow parents to confidently invest in one offspring because they are more likely to survive to adulthood.
Is a whooping crane R or K-selected?
Not much is known about the learning that takes place in this K-selected species over the almost one year that the young whooping crane colt remains with its adult parents.
Are Dolphins r-selected species?
Explanation: R-selected or opportunistic species are species that have high growth rates , produce many offspring, and have low survival odds for those many offspring. ... Examples of k-selected species include mammals such as humans, dolphins, and rhinos.
What are the six characteristics of an r-selected species?
- Rapid development.
- High reproductive rate.
- Early reproductive age.
- Small body size.
- One reproductive cycle.
- Short lifespan.
- Poor competitive ability.
- High mortality of offspring.
Are Snakes r-selected species?
Humans, elephants, non-human primates, horses, cows and the like are all K-selected species. ... Members of squamate (large lizards and snakes) and Cricetidae (a rodent family) tend to fall more towards the r-selected side of the scale, therefore, the number of offspring plays a large role in the population size.
Why are humans K-selected species?
K-selected species possess relatively stable populations fluctuating near the carrying capacity of the environment . These species are characterized by having only a few offspring but investing high amounts of parental care. Elephants, humans, and bison are all k-selected species.
Are cats K-selected species?
Cats and dogs are r-selected compared to humans, but K-selected compared to mice and rats . Mice and rats, in turn, are K-selected compared to most insects. We can think of an r-K selection continuum and an organism’s position along it in a particular environment at a given instant in time (Pianka 1970).
Are bacteria r-selected?
Examples include rabbits, bacteria, salmon, plants such as weeds and grasses, etc. Many insects are r-selected. For example, ants can be considered r-selected. Plants such as dandelions are another good example of an r-selected species.
Are Lions R or K-selected?
Common examples of k- strategists species include humans, lions and whales.
Why are invasive species R-selected?
Biologists characterize most invasive species as r-selected. R-selected species often grow quickly and mature rapidly . Combined with their explosive reproductive potential, their quick growth and maturation allow them to colonize disturbed and early successional habitats remarkably well.
What species are both R and K-selected?
Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation. (b) Dandelions and jellyfish are both considered r-selected species as they mature early, have short lifespans, and produce many offspring that receive no parental care.
