Question: Are Cats R Strategists?

What does R stand for in ecology?

The first variable is r (the intrinsic rate of natural increase in population size, density independent) and the second variable is K (the carrying capacity of a population, density dependent)..

Are butterflies R strategists?

predictable population increases. Butterflies, which are r-selected, normally experience high mortality throughout their life cycle. Scientists typically expect only about 1% of eggs to survive to reproductive maturity.

Are K selected species generalists or specialists?

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.

What is a feature of R selected species?

The production of numerous small offspring followed by exponential population growth is the defining characteristic of r-selected species. They require short gestation periods, mature quickly (and thus require little or no parental care), and possess short life spans.

What are the four main characteristics of a population?

Population Size and Density: Total size is generally expressed as the number of individuals in a population.Population dispersion or spatial distribution.Age structure.Natality (birth rate)Mortality (death rate)Oct 9, 2018

What are three traits of an R strategist?

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.

Are birds R or K strategists?

K-selected species are characterized by long gestation periods lasting several months, slow maturation (and thus extended parental care), and long life spans. … Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.

Why are rabbits R-strategists?

In r and K selection theory, the rabbit is known as an r-strategist. R-strategists often live in unstable environments, so there’s little chance that their offspring would survive into adulthood. To solve this problem, r-strategists produce a ton of cheap offspring.

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 oak trees 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.

Do you think humans exhibit traits of R or K selection?

Humans definitely show characteristics of K-selection. Humans have a longer life span than many organisms. They also have few offspring.

Are cats r selected species?

r selected species are also known as r strategists and opportunistic species. They practice big-bang reproduction, AKA semelparity. … Cats are r-selected compared to humans, and K-selected compared to cockroaches.

What are K and R selected species?

r-selection: On one extreme are the species that are highly r-selected. r is for reproduction. Such a species puts only a small investment of resources into each offspring, but produces many such low effort babies….r- and K-selection.CharacteristicrKLifespanshortlongEarly mortalityhighlow6 more rows

Are Lions R or K-selected?

Common examples of k-strategists species include humans, lions and whales.

Are dogs K or R strategists?

Indeed, one can think of a given organism as an “r-strategist” or a “K-strategist” only relative to some other organism; thus statements about r and K selection are invariably comparative. Cats and dogs are r-selected compared to humans, but K-selected compared to mice and rats.

Are minnows R strategists?

Select from the following list the species that are r-strategists: minnow, giraffe, human, beetle, bacteria, eagle, and cougar. Minnow,beetle and bacteria because they all have short lifespans and focus on quick reproduction.

What animals are 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.

Are K-selected species opportunists?

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 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 humans R strategists or K 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 frogs K strategists?

Frogs produce many eggs, and a fraction live to reproduce themselves. They are an example of r-strategists. “r and K selection.” University of Miami: Department of Biology.