The two evolutionary "strategies" are termed r-selection, for those species that produce many "cheap" offspring and live in unstable environments and K-selection for those species that produce few "expensive" offspring and live in stable environments.

Also to know is, what is a K strategist?

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.

Beside above, what is an R strategist and K strategist? The two evolutionary "strategies" are termed r-selection, for those species that produce many "cheap" offspring and live in unstable environments and K-selection for those species that produce few "expensive" offspring and live in stable environments.

Consequently, what is the difference between a K and R strategist species?

The r selected species live in populations that are highly variable. The fittest individuals in these environments have many offspring and reproduce early. K selected species live in populations that are at or near equilibrium conditions for long periods of time.

What are characteristics of R strategists?

Among the traits that are thought to characterize r-selection are high fecundity, small body size, early maturity onset, short generation time, and the ability to disperse offspring widely. Organisms whose life history is subject to r-selection are often referred to as r-strategists or r-selected.

What does R and K stand for?

"r" stands for "rate" {growth rate}, r strategists have a high r value and a low K value. They grow fast but most die. "K" stands for Kapazitätsgrenzen which is german for capacity limit, now called carrying capacity, K strategists have a low r and a high K. They grow slow but more survive.

Are humans R or K?

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.

What are examples of R strategists?

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: their offspring are few but long-lived.

What does K selected mean?

K selection
selection occurring when a population is at or near the carrying capacity of the environment, which is usually stable: tends to favor individuals that successfully compete for resources and produce few, slowly developing young, and results in a stable population of long-lived individuals.

Are dogs K strategists?

R-strategists, K-strategists and Survivorship curves: The reproductive adaptations of different organisms. Other organisms, like dogs, cats, insects, and fish show the complete opposite tendencies in reproduction. They breed once or twice in their lives, and have a huge number of offspring.

Are cats K strategists?

Animals such as fish and frogs that lay hundreds of eggs at a time are R-strategists, animals such as humans, puffins and the majority of other organisms are K-strategists. The image shown shows a cat, an example of a organisms that produces few long living organisms.

What does R Selected mean?

r selection
selection occurring when a population is far below the carrying capacity of an unstable environment: tends to favor individuals that reproduce early, quickly, and in large numbers so as to make use of ephemeral resources and ensure that at least some offspring survive.

Why are humans K selected species?

They produce, during their life spans, fewer progeny, but place a greater investment in each. Their reproductive strategy is to grow slowly, live close to the carrying capacity of their habitat and produce a few progeny each with a high probability of survival. Typical K-selected organisms are elephants, and humans.

What are the characteristics of R selected and K 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 type1 survivorship?

Type I or convex curves are characterized by high age-specific survival probability in early and middle life, followed by a rapid decline in survival in later life. They are typical of species that produce few offspring but care for them well, including humans and many other large mammals.

Are sea turtles R selected or K selected?

R-selected species usually don't care for offspring, whereas k-selected species such as orangutans will provide care (orangutan offspring live with their mothers for up to eight years). Sea turtles are a good example of a species that fits somewhere in the middle.

Are mosquitoes r selected species?

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 are the three types of survivorship curves?

There are three types of survivorship curves. Type I curves depict individuals that have a high probability of surviving to adulthood. Type II curves depict individuals whose chance of survival is independent of age. Type III curves depict individuals that mostly die in the early stages of their life.

Are cane toads R or K strategists?

Cane toads can't fly or climb!
They are niche generalists and are r-strategists laying 8,000-30,000 eggs per year, and are poisonous to Australian predators.

Are giraffes k selected?

Which of the following statements does not support the conclusion that giraffes are k-selected species? Giraffes are approximately 6' tall and weigh 150 lbs at birth. Wild giraffes begin mating at 6-7 years of age.

How do you determine carrying capacity?

Explanation: To find carrying capacity on a graph, you need to locate the point on the graph where the population line is horizontal. Alternatively, the carrying capacity may be explicitly marked with a dotted horizontal line or a horizontal line of a different color.

Are Wolves R selected or K selected?

Species using an r-selected reproductive strategy tend to have more offspring and invest less in them, a good example is the rabbit. K-selected species have less offspring but invest much more in them, such as the wolf. You can read up more on them, it's interesting stuff.