Snakes display both r and K traits. They are much longer lived, produce a moderate number of eggs (some species far fewer than others).
The issue with the r/K equation is that there are too many species that have the characteristics of both the r and K types which renders the information either obvious...like humans being a definite K to some frogs that are definitely r...or with some calculated value that is essentially too general for use.
Techniqually, both because turtles can have multiple eggs, and a fast reproduction rate. The also can stay with their offspring. They have traits of both.
K-selected species are present in environments that are predictable and where resources aren't necessarily fought over. A k-selected species will produce less frequently and with few children than an R (or S) selected species. It's the concept of quality over quantity. K-selected species are typically bigger, take longer to reach maturity, and live longer.
Because of their inability to reproduce rapidly, "k"-selected species tend to be more sensitive to change and are, therefore, less able to adapt to a rapidly changing environment. This is what makes them susceptible to endangerment. - See more at: http://www.chacha.com/question/why-are-pest-species-likely-to-be-extreme-r%26%2345%3Bselected-species#sthash.E2Anrl2s.dpuf
An r-selected species is an animal with a high growth rate and offspring with a lower chance of living past adulthood. Examples of r-selected species are small rodents, mammals and grass.
R-selected. They produce many offspring, are weak competitors in crowded niches, and are usually of small body size. There are several species of lizard (such as the komodo dragon) that could qualify as k-strategists within their environment.
k
R- Selected species have high population densities while k-selected species have lower population densities
K-selected
k selected
Those are reproductive strategies that identify certain species. R-selected are those that reproduce rapidly and produce a lot of progeny; bacteria are an example. K-selected are those that reproduce very slowly and are slow to mature; humans are a k-selected species. Population density is the number of organisms per unit area. Some organisms don' t like to be crowded, so the density can affect the population size. Also, some limiting factors are density-dependent, like food or living space.
K selected
K-selected species are present in environments that are predictable and where resources aren't necessarily fought over. A k-selected species will produce less frequently and with few children than an R (or S) selected species. It's the concept of quality over quantity. K-selected species are typically bigger, take longer to reach maturity, and live longer.
The r and K selection theory refers to two different reproductive strategies in ecology. r-selected species typically have many offspring, grow quickly, and have a high reproductive rate. K-selected species have fewer offspring, invest more resources in each offspring, and have a lower reproductive rate. These strategies are shaped by different environmental conditions and life history traits.
Those are reproductive strategies that identify certain species. R-selected are those that reproduce rapidly and produce a lot of progeny; bacteria are an example. K-selected are those that reproduce very slowly and are slow to mature; humans are a k-selected species. Population density is the number of organisms per unit area. Some organisms don' t like to be crowded, so the density can affect the population size. Also, some limiting factors are density-dependent, like food or living space.
Because of their inability to reproduce rapidly, "k"-selected species tend to be more sensitive to change and are, therefore, less able to adapt to a rapidly changing environment. This is what makes them susceptible to endangerment. - See more at: http://www.chacha.com/question/why-are-pest-species-likely-to-be-extreme-r%26%2345%3Bselected-species#sthash.E2Anrl2s.dpuf
An r-selected species is an animal with a high growth rate and offspring with a lower chance of living past adulthood. Examples of r-selected species are small rodents, mammals and grass.
Vultures are k-selected organisms because they only have a few offspring, they take care of their offspring, and they do not reproduce quickly.
K. R. G. Welch has written: 'Snakes of the world'