Are Birds K Strategists?

What animals are K-strategists?

Organisms whose life history is subject to K-selection are often referred to as K-strategists or K-selected.

Organisms with K-selected traits include large organisms such as elephants, humans, and whales, but also smaller long-lived organisms such as Arctic terns, parrots and eagles..

Are Squirrels k-selected?

Tree squirrels are K-selected compared to ground squirrels but rodents are r-selected compared to elephants, etc.

Are Bears K strategists?

life history of polar bears Polar Bears have a K-selected strategy. This means that they have few offspring, a high level of parental care, long life spans and mature sexually later in life. Female Polar bears are the sole caregivers to baby cubs.

Do song sparrows sit on eggs?

The female does all the incubation of the eggs. Incubation last 12 to 13 days and the young will leave the nest in about 10 days, barely able to fly. The parents will continue feeding the young for another 20 days.

Are birds K 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.

What does depopulation mean?

verb (used with object), de·pop·u·lat·ed, de·pop·u·lat·ing. to remove or reduce the population of, as by destruction or expulsion.

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 birds R-strategists?

Their population mortality is low until they reach the end of their lifespan. The Type III or C curve, is typically followed by r-strategist organisms. … In between, there are some organisms like birds, mice, rabbits, butterflies, etc. that neither fit the k-, or r-strategist type of survival.

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.

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.

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).

Why are elephants k-selected?

(a) Elephants are considered K-selected species as they live long, mature late, and provide long-term parental care to few offspring. Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation.

Are song sparrows K or R-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.

What is r rule?

The R* rule (also called the resource-ratio hypothesis) is a hypothesis in community ecology that attempts to predict which species will become dominant as the result of competition for resources. … A large number of experimental studies have attempted to verify the predictions of the R* rule.

Are humans k-selected?

Elephants, humans, and bison are all k-selected species. … These species often have short life expectancies, produce as many offspring as they can, and invest very low amounts of parental care. R-selected species can include mosquitos, mice, and bacteria.

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.

Are Plants R or K strategists?

Even plants are capable of r- and K-selected reproductive strategies. Wind pollinated species produce much more pollin that insect pollinated ones, for example, because the pollin has to be carried at random by the wind to a receptive female flower. Eggs too, can be r- or K-selected.

What color are song sparrow eggs?

Nesting FactsClutch Size:1-6 eggsEgg Width:0.6-0.7 in (1.4-1.7 cm)Incubation Period:12-15 daysNestling Period:9-12 daysEgg Description:Blue, blue-green, or gray-green spotted with brown, red-brown, or lilac.3 more rows

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.

Are trees K selected?

K-selected species While larger in size when born, the offspring are relatively helpless and immature at birth. … Examples of K-selected species are primates including humans, other mammals such as elephants, and plants such as oak trees.