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Question #46632
The Question
An ecologist applies the mark-recapture method (Lincoln-Petersen index, N = MC/R) to estimate the population density of a highly r-selected species over a prolonged sampling interval. Which of the following best explains the likely error in the final population estimate?
Options
- A.
The population size will be severely underestimated because the high intrinsic rate of increase (r) inflates the number of recaptured individuals (R).
- B.
The population size will be severely overestimated because high mortality and rapid turnover violate the closed population assumption, artificially lowering the number of recaptured individuals (R).
- C.
The estimate will remain accurate as long as the carrying capacity (K) of the habitat is not exceeded during the sampling interval.
- D.
The population size will be severely overestimated because r-selected species exhibit a Type I survivorship curve, ensuring all marked individuals survive to the second sampling.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Parasitism|Population Growth Model Dynamics|K-selection vs R-selection
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: This question tests the synthesis of mathematical ecology (Lincoln-Petersen index) with evolutionary life-history strategies (r-selection).
The common misconception is failing to link the biological reality of high mortality/natality in r-selected species to the mathematical denominator (R) of the formula.
Students must recognize that violating the 'closed population' assumption via rapid turnover inversely inflates the population estimate.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Organisms and Populations - Class 12 |
| Concept | Evolutionary Ecology of Parasitism |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |