| Characteristic r K | Lifespan short long | Early mortality high low |
|---|
What are examples of r-selected species?
Examples of r-selected species are
marine invertebrates, such as jellyfish, and plants, such as the dandelion
. Dandelions have small seeds that are dispersed long distances by wind; many seeds are produced simultaneously to ensure that at least some of them reach a hospitable environment.
What species are both R and K-selected?
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.
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.
What is the difference between R and K selection?
| Characteristic r K | Reproductive Maturity early late | Size of offspring small large | Independence at birth early late | Ability to learn low high |
|---|
Is a cat AK species?
Compared to members of those wild species who lay hundreds to thousands of eggs that receive no parental care and die young,
the domestic canine and feline species are classified as K species
.
Are sea turtles R or K-selected?
r/K selection as a continuous spectrum
Similarly, reptiles such as sea turtles display
both r- and K-traits
: although large organisms with long lifespans (should they reach adulthood), they produce large numbers of unnurtured offspring.
Are rabbits r-selected?
R-selected organisms
, those emphasizing a fast growth rate, high number of offspring, include rabbits, bacteria, salmon, plants such as weeds and grasses, etc.
What does K selection mean?
K-selection: On the other extreme are species that are highly K-selected. K refers to
the carrying capacity, and means that the babies are entering a competitive world, in a population at or near its carrying capacity
. … K-selected species produce offspring that each have a higher probability of survival to maturity.
Is a coyote AK selected species?
While still considered a K- selected species
, coyotes are further along the continuum toward r-selected species than the giant panda because of a higher number of offspring and a shorter weaning period.
Are maple trees K-selected?
Maple trees are K-selected “climax” species
which grow slowly in their own shade and reproduce relatively large seeds over a number of years throughout their relatively long lifespan (Figure below). Maple trees show K-selected adaptations to a predictable shade environment they help to create.
What are R species?
r-selected species, also called r-strategist,
species whose populations are governed by their biotic potential
(maximum reproductive capacity, r). Such species make up one of the two generalized life-history strategies posited by American ecologist Robert MacArthur and American biologist Edward O.
What is R and K reproductive strategy?
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 an R strategist and K strategist?
r strategist is an organism living in unstable environments. Hence, they undergo rapid reproduction to stabilize themselves. Whereas, K strategist is an organism living in stable environments
. Therefore, they are high in population and do not need to undergo rapid reproduction.
Why are r-selected species invasive?
R-selected species often grow quickly and mature rapidly. Combined with their explosive reproductive potential,
their quick growth and maturation allow them to colonize disturbed and early successional habitats remarkably well
. This is not to suggest that all r-selected species are invasive.
Are r-selected species more likely to go extinct?
Thus
K-selected species are more prone to extinction than r-selected species
because they mature later in life and have fewer offspring with longer gestation times.
Why are r-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
. These species typically have little parental care and reproduce often.
Do cats fart?
Cats do get gas
. Like many other animals, a cat has gases inside its digestive tract, and this gas leaves the body via the rectum. Cats usually pass gas quietly and there isn’t much odor to it. However, sometimes cats can have excessive bloating, discomfort, and bad-smelling gas.
What’s a female cat called?
A male cat is called a tom or tomcat (or a gib, if neutered). An unspayed female is called
a queen, (or a molly, if spayed)
, especially in a cat-breeding context. A juvenile cat is referred to as a kitten. In Early Modern English, the word kitten was interchangeable with the now-obsolete word catling.
What is a large female cat called?
Synonyms, crossword answers and other related words for LARGE FEMALE CAT [
lioness
]
Why are dandelions r-selected?
Dandelions are particularly good examples of R-selected traits because they have several of the physical characteristics associated with R-selected traits including:
rapid development, small size, and short lifespan
.
Are salmon r-selected?
Bears are known as a “K-selected” species, meaning they have just a few offspring but with long, intense parental involvement. The salmon’s strategy is quantity.
As an “R-selected” species, they have many offspring, laying up to 4,000 eggs per nest, but have no parental involvement whatsoever.
Are snakes r-selected?
Members of squamate (large lizards and snakes) and Cricetidae (a rodent family) tend to fall more towards the r-selected side of the scale
, therefore, the number of offspring plays a large role in the population size. It is also important to note that evolution is what caused species to be r-selected or K-selected.
Are tortoises r-selected?
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 animals are R strategist?
Examples of r-strategist species are
dogs, cats, insects, and fish
.
