What is an R strategist or a K strategist?

What is an R strategist or a K strategist?

The terms r-selection and K-selection are used by ecologists to describe the growth and reproduction strategies of organisms. r-selected species have a high growth rate but low survivability (“cheap” offspring) K-selected species have a low growth rate but high survivability (“expensive” offspring)

What is a typical K strategist?

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. It is not surprising that many organisms cannot be categorized neatly into this r vs. K scheme.

What does the K stand for in K strategist?

K-strategy relates to the carrying capacity of an habitat or a niche (K stands for Kapazität, which is the German word for capacity). K-strategists usually have fewer reproduction rates but are better adapted in terms of competition with other species in the niche (i.e it’s a qualitative approach).

What is strategy k?

K-strategy implies that a constant, relatively small number of high-quality offspring is more likely to lead to reproductive success than producing offspring at the maximum rate possible (see r-strategy). …

Are song sparrows K strategists?

Song sparrows reproduce multiple times in a year and have limited parental care, traits of r-strategists. Generalists can live in a variety of habitats and have diverse diets.

Are whales K strategist?

Species designated as K-strategists thrive through longevity and have a higher survival rate at birth, but produce far fewer offspring. Examples include elephants and whales.

Are song sparrows R or K strategists?

What is type2 survivorship?

A type II survivorship curve shows a roughly constant mortality rate for the species through its entire life. This means that the individual’s chance of dying is independent of their age. Type II survivorship curves are plotted as a diagonal line going downward on a graph.

Which organism is the best example of a K strategist?

Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.

Which of the following is K strategist?

Explanation: Species designated as K-strategists thrive through longevity and have a higher survival rate at birth, but produce far fewer offspring. Examples include elephants and whales.

Are sea turtles R or K strategists?

Similarly, reptiles such as sea turtles display both r- and K-traits: although sea turtles are large organisms with long lifespans (provided they reach adulthood), they produce large numbers of unnurtured offspring.

Why are birds k-selected?

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.

What does the K in K-strategists stand for?

K-strategy relates to the carrying capacity of an habitat or a niche (K stands for Kapazität, which is the German word for capacity). K-strategists usually have fewer reproduction rates but are…

What is the r-strategy and K strategy in biology?

K and r Reproductive Strategies 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.

What is K strategy of reproduction?

K-selected reproductive strategies tend towards heavy investment in each offspring, are more common in long-lived organisms, with a longer period of maturation to adulthood, heavy parental care and nurturing, often a period of teaching the young, and with fierce protection of the babies by the parents.