Question

Which of the following is generally the most appropriate measure of population density?
(A)Indirect count
(B)Biomass of the individuals
(C)Relative densities of the individuals
(D)Fishes captured in each trap

Answer 1

Population density is basically the number of individuals in an area but sometimes when the counting of organisms is illogical, other measures are also applied to measure the population density.

Complete answer:
Population size or population density is a measurement of population per unit area, mainly representing the number density. But not always we can count each and every individual one by one to measure its density. Rather in some cases, mostly when the population is huge and counting is time-consuming, we estimate population size indirectly without counting them. Although the total number is generally the most appropriate way of measuring density, the indirect count is also used for that purpose.

Additional information:
Some other measures of finding a more accurate population density over a specific area are-
Arithmetic density: The total number of individual/ area of land
Physiological density: The total population/ area of arable land, where arable land is a type of land capable of being plowed and used to grow crops
Agricultural density: The total rural population/ area of arable land
Residential density: The number of people living in an urban area/ area of residential land
Urban density: The number of people inhabiting an urban area/ total urban land
Ecological optimum: The density of the population that can be supported by the available natural resources

So, the correct answer is "Indirect count".

Note: In the case of humans, population density refers to the number of people living per square km or square mile. This is usually counted for a city, country, or even the entire world. Currently, the worldwide population density is 14.7 per km2. Normally, city-states, microstates, and urban areas have more population density than any other area.