Are turtles R or K-selected?
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.
What is type1 survivorship?
A type I survivorship curve shows individuals that have a high probability of surviving through early and middle life but have a rapid decline in the number of individuals surviving into late life.
Are whales r-selected?
A whale tends for a single calf. r-selection: On one extreme are the species that are highly r-selected. r is for reproduction. Such a species puts only a small investment of resources into each offspring, but produces many such low effort babies….r- and K-selection.
| Characteristic | r | K |
|---|---|---|
| Early mortality | high | low |
Are Crocodiles k-selected?
Some reptiles, like alligators and crocodiles, are also K-selected, living for a long time and laying eggs multiple times. Some even provide early parental care over their eggs and offspring.
What was the biggest animal ever?
Blue whaleAnimal / Biggest
Far bigger than any dinosaur, the blue whale is the largest known animal to have ever lived. An adult blue whale can grow to a massive 30m long and weigh more than 180,000kg – that’s about the same as 40 elephants, 30 Tyrannosaurus Rex or 2,670 average-sized men.
What organisms have a Type 1 survivorship curve?
Humans and most primates have a Type I survivorship curve. In a Type I curve, organisms tend not to die when they are young or middle-aged but, instead, die when they become elderly.
Which countries have Type 1 survivorship?
Wealthy developed countries such as Japan and Germany currently have a Type I survivorship curve because most people live to be very old. Type II populations have a similar death rate at all ages.
What is AK strategist species?
K-selected species, also called K-strategist, species whose populations fluctuate at or near the carrying capacity (K) of the environment in which they reside. Such species make up one of the two generalized life-history strategies posited by American ecologist Robert MacArthur and American biologist Edward O.
Are reptiles K-selected or r-selected?
r-selection: On one extreme are the species that are highly r-selected. r is for reproduction. Such a species puts only a small investment of resources into each offspring, but produces many such low effort babies….r- and K-selection.
| Characteristic | r | K |
|---|---|---|
| Lifespan | short | long |
| Early mortality | high | low |
Is the blue whale extinct?
Endangered (Population increasing)Blue whale / Conservation status
Do elephants have a Type 1 survivorship curve?
Elephants have a Type I survivorship curve (mortality increases with age), and fecundity decreases with age.
What is a Type 1 survivorship curve?
Type I or convex curves are characterized by high age-specific survival probability in early and middle life, followed by a rapid decline in survival in later life. They are typical of species that produce few offspring but care for them well, including humans and many other large mammals.
What is an R species?
r-selected species are those that emphasize high growth rates, typically exploit less-crowded ecological niches, and produce many offspring, each of which has a relatively low probability of surviving to adulthood (i.e., high r, low K). A typical r species is the dandelion (genus Taraxacum).