Whats a k selected species?

Last Update: May 30, 2022

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Asked by: Nola Koepp
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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.

What is the difference between r-selected and K-selected species?

r-selected babies grow rapidly, and tend to be found in less competitive, low quality environments. ... K-selected species produce offspring that each have a higher probability of survival to maturity.

Is a dog AK selected species?

Examples of r-strategist species are dogs, cats, insects, and fish.

What is AK and r-selected species?

Wilson; K-selected species—that is, species whose population sizes fluctuate at or near their carrying capacity (K)—make up the second strategy. The production of numerous small offspring followed by exponential population growth is the defining characteristic of r-selected species.

What is AK selected species in the ocean?

K-selected species, also called K-strategist, species whose populations fluctuate at or near the carrying capacity (K) of the environment in which they reside.

Difference between r-selected and k-selected species

24 related questions found

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).

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 humans R strategists?

Both across and within species, r and K strategists differ in a suite of correlated characteristics. Humans are the most K of all. K's supposedly have a longer gestation period, a higher birthweight, a more delayed sexual maturation, a lower sex drive, and a longer life.

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.


Are K-selected species generalists?

When environmental conditions change, generalists are able to adapt, but specialists tend to fall victim to extinction much more easily. K-Selected species are species that have a low intrinsic growth rate, which causes the population to increase slowly until it reaches the carrying capacity of the environment.

Why are dolphins K-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.

Are frogs K-selected species?

Why doesn't a frog, which is an r-selected species, care for its offspring in the way a wolf, which is a Kselected species, cares for its offspring? a. Frogs have been selected by stable, predictable environments, therefore they do not feel the need to care for their offspring like wolves.

Are mosquitoes r-selected species?

On the other end of the spectrum are “r-selected” organisms such as sea turtles and mosquitos. These creatures lay vast numbers of eggs to produce numerous offspring and invest almost nothing in caring for them.


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.

Why are rabbits r-selected species?

So this begs the question are rabbits truly prolific, and why? In Page 2 the 1960s two ecologists came up with r/K selection theory. It relates to parental investment and reproductive strategies adopted by species in order to advance its kind into the future. ... And they have the ability to reproduce rapidly.

Why are jellyfish r-selected species?

(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.

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.


Is a cat AK species?

Compared to members of those wild species who lay hundreds to thousands of eggs that receive no parental care and die young, the domestic canine and feline species are classified as K species.

Are trees R or K strategists?

For instance, trees have traits such as longevity and strong competitiveness that characterise them as K-strategists. In reproduction, however, trees typically produce thousands of offspring and disperse them widely, traits characteristic of r-strategists.

What is r at carrying capacity?

In the equations describing growth of populations of organisms, r represents the slope of the line representing exponential growth. The letter K represents the carrying capacity of a habitat for members of a given sort of organism.

Are jellyfish r-selected?

r-selected species

Animals that are r-selected do not give long-term parental care and the offspring are relatively mature and self-sufficient at birth. Examples of r-selected species are marine invertebrates, such as jellyfish, and plants, such as the dandelion.


Why are trees K-selected?

The tree's height and size allow it to dominate other plants in the competition for sunlight, the oak's primary energy resource. Furthermore, when it does reproduce, the oak produces large, energy-rich seeds that use their energy reserve to become quickly established (K-selection).

Are trees K-selected species?

In our forest example, the large trees (maple, ash, oak, and others) are K-selected. They live a long time, grow very slowly, and can get large enough to outcompete smaller species. Like the elephant, most birds and mammals develop slowly, care for only a few young over multiple births, and are strong competitors.

What is a Type Two survivorship curve?

Populations with Type II survivorship have a constant proportion of individuals dying over time. ... For example, the type II curve has a constant proportion of individuals dying each time period. Starting with 1,000 individuals, in the first time period if 40% survive, then only 400 will be left.

What is the difference between K and R strategists?

The key difference between r strategist and K strategist is that the r strategist lives in unstable and unpredictable environments while the K strategist lives in more stable environment. Because of this environmental conditions, the r strategists produce many offspring while the K strategists produce few offsprings.