Answer: the answer your looking for is A
Explanation:
Note about the question:
You will find the graph in the attached files.
Answer:
A) overfishing in previous years and warm waters with few nutrients
Explanation:
Under El Niño conditions, there is a tropical stream, which is usually weak, that acquires strength while the opposite streams debilitate. This event impedes warm water to go eastward, remaining in South America´s coasts, which produces unusual precipitations in Chile followed by floral bloom in Atacama desert and fewer precipitations events in Eastsouth Asia and North Australia. During and after the El Niño, occurs a fishery crisis because there is no upwelling on the coasts of South America, nutrients from the bottom do no ascend, and fish populations remain equal or decrease.
Around 1970, there was e<u>xcessive overexploitation of fishes</u>. This overfishing probably led to a significant decrease in the anchovy population size, reducing the number of individuals in the reproductive stage, especially the females. The graph reflects that during the following years, there were also peaks in anchovy catch. The population did not have enough time to recover from the highest peak in 1970.
From 1982-1983 El Niño event was severe. No upwelling meant no nutrients to survive, and that the remaining anchovy population, previously affected by fishery, hardly made it that year. There was probably a fishery crisis, and hence, no animals were caught in 1984.
<span>The </span><span>cladogram of animals is based on scientists current
understanding of the evolutionary history of living species. </span>I
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Answer:
<u>I. Define the following terms:-</u>
Population ➝ the world population is the total number of humans currently living.
Population density ➝ is a measurement of population per unit area or volume. It is frequently applied to living organisms, most of the time to humans.
Carrying capacity➝ is the average population density or population size of a species in a habitat.
Exponential growth➝ is a process that increases quantity over time. It occurs when the instantaneous rate of change.
Density-independent limiting factor➝ is any force that affects the size of a population of living things.
Logistic Growth ➝ is a population's per capita growth rate stays the same regardless of population size, making the population grow faster as it gets larger.
Density-dependent limiting factor➝ is a limiting factor of a population wherein large, large dense populations are more affected than small, less crowded ones ex. predation, competition, food supply.
<u>II. Enumarate at least three(3) factors that affect population growth.</u>
<u>III. Differentiate exponential growth and logistic growth.</u>
Exponential growth is a growth in population wherein the number of individuals increases. Logistic growth entails exponential growth in population along with a growth rate that is in a constant state. As the population comes to its carrying capacity, the growth rate then decreases significantly.
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