Are Fish Rselected Species
What is an example of an R strategist?
Examples of r-strategist species are dogs, cats, insects, and fish.
What kind of organisms are r-strategists?
Organisms whose life history is subject to r-selection are often referred to as r-strategists or r-selected. Organisms that exhibit r-selected traits can range from bacteria and diatoms, to insects and grasses, to various semelparous cephalopods and small mammals, particularly rodents.
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 sea 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.
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.
Is a frog an R-selected species?
Other examples of r-selected species include frogs, bacteria, and dandelions.
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.
Which types of species are better able to survive environmental change R or K-selected?
Which types of species are better able to survive environmental change – r- or k-selected? R selected species are better equipped to survive environmental change because their quick population turn over can quickly adapt.
Are invasive species R or K?
Invasive species are often said to be r-selected. However, invaders must sometimes compete with related resident species. In this case invaders should present combina- tions of life-history traits that give them higher competitive ability than residents, even at the expense of lower colonization ability.
Why are zebra mussels located primarily?
The student earned one point in part (a) for implying that the eastern U.S. has more bodies of still water: “Zebra mussels are located in Eastern United States because they haven’t been successfully introduced to other areas … since [there] are not many large bodies of still water in the Western US.”
Which organism is most likely to be part of an R-selected species?
R-selected organisms, those emphasizing a fast growth rate, high number of offspring, include rabbits, bacteria, salmon, plants such as weeds and grasses, etc.
Which is not the characteristics of R-selected species Mcq?
11. Which is not the characteristic of ‘r’ selected species? The correct answer is – 2. Parental care.
Are pioneer species R or K selected?
Answer and Explanation: Pioneer species are most commonly R-selected species. This means that they have shorter lifespans, tend to be smaller plants, and usually produce multiple offspring.
Are rabbits 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.
Are plants r-selected or K-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.