Are Insects R-Selected Species?

Are cats r-selected?

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 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.

Are humans 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 r-selected species?

R-selected species, also called r-strategist, species whose populations are governed by their biotic potential (maximum reproductive capacity, r). … Wilson; K-selected species—that is, species whose population sizes fluctuate at or near their carrying capacity (K)—make up the second strategy.

Why are r-selected species opportunists?

Why do r-selected species tend to be opportunists? They reproduce and disperse rapidly when conditions are favorable or when disturbance opens up and a new habitat or niche for invasion. … They tend to reproduce later in life and have a small number of offspring with fairly long life spans.

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 cockroaches r-selected species?

R-selected species are things like the cockroach. They’re generally small and have short lives, so their best bet is to put their energy into growth. They grow quickly and produce as many offspring as possible to carry on genetic information.

Are insects K selected species or R selected species?

Although not always the case, r-selection is more common among smaller animals with shorter lifespans and, frequently, non-overlapping generations, such as fish or insects. … K-selected species produce offspring that each have a higher probability of survival to maturity.

What are examples of R selected species?

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 ants R or K selected?

For example, ants can be considered r-selected. Plants such as dandelions are another good example of an r-selected species. 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.

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.

What characteristics do humans share with R selected species?

Explanation: Species with r strategies are characterized by favoring a high population growth rate, The humans share this characteristic because the population increase has been exponential worldwide more than 7550 millions of habitants.