Each August, dolphins near the coast of the Atlantic ocean. In a hypothetical situation, an initial population of 900 dolphins gives birth to 390 tiny babies, and during the next 12 months, 60 dolphins die. Assuming the dolphin population grows geometrically, what will the dolphin population be in 12 years?
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Population Growth
R and K Selection
R and K selection are concepts in ecology used to describe traits in the fluctuation of a population or population dynamics. For example, they describe the life-association traits between parent and offspring, such as quantity or number of young ones born at a time, quality of parental care, the age to maturity, and reproductive effort.
Each August, dolphins near the coast of the Atlantic ocean. In a hypothetical situation, an initial population of 900 dolphins gives birth to 390 tiny babies, and during the next 12 months, 60 dolphins die.
Assuming the dolphin population grows geometrically, what will the dolphin population be in 12 years?
Step by step
Solved in 3 steps
- Very few species on Earth are completely r-selected or K-selected. Many species in their natural habitats demonstrate a life strategy that ranges along a continuum between r- and K-selected strategies. Use this information to answer the 3 sub-parts. a) Sea otters are marine mammals that live in northern Pacific coasts. Typical female sea otters reach sexual maturity around 3 or 4 years of age, and they reproduce once a year, producing a single pup.Only female sea otters are tasked with raising the offspring. Mothers constantly take care of their pups until they are 8 months old, but only 25% of the pups survive past the first year. Sea otter fur was highly sought after between the 18th century and the early 20th century. Through conservation efforts, the number of sea otters increased. The current world population is estimated to be between 1 000 and 2 000 individuals, and they are considered to be endangered. Their main food source is sea urchins, molluscs, and crustaceans. Sea…In many rural areas, stray cats are a problem as they may return to being wild feral cats that have not been spayed or neutered can reproduce, which may result in a population of feral cats. One pair of cats can produce 12 kittens in one year, and half of these kittens are female; this increased population would potentially produce 84 kittens in the second year. In 5-years, the population could reach almost 33000 feral cats. A) What conditions or factors would have to be in place for the population to achieve its biotic potential?ratio of birth of horse is 50:50 please answer all the parts as they are connected a) what you can know from the graph? why these curve of male and female is different. please propose some kind of testable hypothesis related to horse life. b) in case population growth is exponential and its dangerous for the surrounding. management team is called in the zoo from the graph which horse should be pick for maximum effect in lowering the growth?
- You study a population of snails recently introduced to a small lake 10 years ago. You know that 7 snails were originally let go in the lake by a cottager. The lake has no snail predators nor any other species occupying the same or a similar ecological niche. You know from your research that, under ideal conditions, the instantaneous rate of increase of this snail species is 0.5. You also think the conditions on the lake were ideal when the snails were introduced. After surveying the food available in the lake, you estimated that there is enough food to support a population of 1696 snails. How many snails do expect to be in the lake now?ESTIMATING POPULATION SIZE USING THE LINCOLN INDEX 1. A biologist wants to estimate the size of a population of turtles on an island. He captures 20 turtles on his first visit, and marks their backs with red paint. Two weeks later he returns to the island and captures 25 turtles. Five of these 25 turtles have red paint on their backs. Using the Lincoln index equation, calculate the estimated population 2. Overfishing in Antarctica has resulted in a steep decline in Patagonian toothfish. Fishery scientists are monitoring the population size to see if it is recovering by using the mark-release-recapture method and the Lincoln index equation. On their initial visit, the scientists caught and marked 100 specimens. When they returned on a second visit, they captured a total of 70 Patagonian toothfish. If the scientists estimated the population size was 700, how many of the recaptured toothfish were marked? Show all working.The Two-Sided Attack on the Spiny Cactus The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cact shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps. Spiny Cactus Organism Collared peccary (musk hog) Collared peccaries and parasitic wasps are two organisms that were introduced to the ecosystem in which the spiny cactus population lives. The chart describes the relationship between the spiny cacti and these two organisms Parasitic wasp 100- o 70 80 90 100 110 120 130 Number of Spines Organisms Introduced into the Ecosystem C2022 Iluminate Education, Inc. Relationship with Spiny Cactus Plants They eat spiny cactus plants that have a small number of spines. They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus. and eat the inner pulp of the…
- Malaria model: The simplest malaria model, known as the Ross-Macdonald (winner of the 1911 Nobel Price in Health), considers two populations. The population of infected humans and the population of infected mosquitos. This model is given by: d.r тaby(1 - г) —гт dt dy acr(e™" – y) – gy. dt where a is erpected number of bites on humans per mosquito, m is equilibrium mosquito density per human, n is length of incubation period, g is the daily force of mosquito mor- tality, b is the transmission efficiency from infectious mosquito to susceptible human, c is the probability of infection of an uninfected mosquito by biting an infectious human, x is the proportion of infected humans and y is the proportion of infectious mosquitoes. Determine Ro for this modelThe Two-Sided Attack on the Spiny Cactus The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cacti shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps. Spiny Cactus Organism Collared peccary (musk hog) Number of Cacti Parasitic wasp 300 200 100 T Collared peccaries and parasitic wasps are two organisms that were introduced to the ecosystem in which the spiny cactus population lives. The chart describes the relationship between the spiny cacti and these two organisms. 70 1 1 80 90 100 110 120 130 Number of Spines Organisms Introduced into the Ecosystem Relationship with Spiny Cactus Plants They eat spiny cactus plants that have a small number of spines. They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus and eat the inner pulp of the…You study a population of mussels recently introduced to a section of the Rideau River 8 years ago. You know that 20 mussels were originally let go in the river by a resident. These mussels have no predators. You know from your research that, under ideal conditions, the instantaneous rate of increase of this mussel species is 0.13. You also think the conditions on the river were ideal when the mussels were introduced. After surveying the food available in the river, you estimated that there is enough food to support a population of 12,100 mussels. How many mussels do expect to be in the river now?
- The world population reached seven billion in 2011. At current growth rate, it is expected to reach eight billion by 2024 and nine billion by 2037. However, many projections predict that the world population will level off at around 9 billion individuals. Why is the world population expected to level off?Please answer the question but not too long! Thanks! Explain what would happen in the simulation if the population size in the beginning was 25 flies instead of 2,000 flies. Predict results you’d expect to see.The Two-Sided Attack on the Spiny Cactus The spiny cactus is a type of plant that lives in a desert environment. A population of spiny cacti shows variation in the number of spines on their outer surfaces. The graph below shows the distribution of the number of spines before the introduction of collared peccaries and parasitic wasps. Spiny Cactus Organism Collared peccary (musk hog) Number of Cacti Parasitic wasp 300 200 100 70 80 Collared peccaries and parasitic wasps are two organisms that were introduced to the ecosystem in which the spiny cactus population lives. The chart describes the relationship between the spiny cacti and these two organisms. I 90 100 110 120 130 Number of Spines Organisms Introduced into the Ecosystem Relationship with Spiny Cactus Plants They eat spiny cactus plants that have a small number of spines. They lay eggs at the base of cactus spines. When the eggs hatch, the emerging grubs dig into the interior of the cactus and eat the inner pulp of the plant,…