To estimate the number of foxes m an area, a researcher conducted a mark-recapture survey. In the fast survey, he caught and marked 90 foxes. In his second survey a week later, he caught 120 foxes of which 40 were marked (recaptures). If you are told that the actual number of foxes in this area is 400, which of the following is a plausible explanation for the anomaly in the researcher's data? 

#Question id: 10640

#Section 1: Ecology

Given below is a graphical representation of plant life histories based on Grime's model in which disturbance and competition are the important factors

Which of the following options correctly represents A, B and C, respectively in the figure above?

#Question id: 10642

#Section 1: Ecology

Which curve best describes survivorship in a songbirds and marine crustacean that molts respectively?

#Question id: 10643

#Section 1: Ecology

Population of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capita death rate of 0.02) Estimate the number of individuals added to (or lost from) a population of 1,000 individuals in one year.

#Question id: 10644

#Section 1: Ecology

There is a species with following feature Good colonizer, reach sexual maturity rapidly, Short-lived, low investment in care for the young

Which of the following above feature showing growth pattern and survival ship curve

#Question id: 10645

#Section 1: Ecology

The logistic equation above is used to describe the rate of change of a population, N, with time, t, where r is the intrinsic rate of increase and K is the carrying capacity. dn/dt is isoclines when 

#Question id: 10646

#Section 1: Ecology

Four sampling unit of Area occupy by species having following number is 00, 20, 10, 20. What is abundance of that species?