Quick Answer: Are Humans K Selected?

Are dogs K 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 humans Semelparous or Iteroparous?

The term iteroparity comes from the Latin itero, to repeat, and pario, to beget. An example of an iteroparous organism is a human—humans are biologically capable of having offspring many times over the course of their lives. Iteroparous vertebrates include all birds, most reptiles, virtually all mammals, and most fish.

What is R and K selection and how do they differ?

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.

Are cats R strategists?

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.

Are humans R 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 primates K selected or R selected?

In this equation N is the number of individuals in the population, t is time, and r is the biotic potential. Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.

Are Lions R or K selected?

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

What are 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 Tigers k-selected?

Tigers are more K-selected when compared to leopards31 and should exhibit slower life history traits manifesting in slower population growth when compared to leopards.

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).

Do 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.

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.

Why are turtles K-selected?

The r/k selection theory should be thought of as a spectrum. Some organisms may produce a medium number of offspring but those offspring still grow quickly and the parents provide little care. … The produce many eggs and do not care for their offspring once the eggs have been laid, but turtles live very long lives.

Are K-selected species Iteroparous?

K -selected species are more likely to be iteroparous , that is, to reproduce in numerous bouts. They also tend to invest in survival more than r -selected species, and may generally be more intelligent. … Population sizes in k -selected species are relatively stable, at or near the carrying capacity of the environment.

Why are endangered species k-selected?

Endangered species are likely to be K-selected species because they produce fewer offspring and breed less frequently. They also have a later reproductive age and a low population growth rate.

Are trees R or K-selected?

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.

Why are rabbits R selected?

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.

Are oak trees R or K strategists?

This oak tree near my house is classified as a k-strategist because of it’s species survival strategies. The oak tree, like other k-strategists, develop in stable environments where their species population remains at stable numbers.

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.