Fishing by humans has severely affected populations of many different marine species, including whales. Examine the figure above, making sure to note what each axis represents. What can best explain the pattern for minke whales?
A. Minke whales were too difficult to catch until they become malnourished due to exploitation competition by other whales.
B. Minke whale populations were overfished in the early 1900s, then recovered in the 1970s as their competitors were killed off.
C. Minke whales are a new species that evolved during the 1960s as an ecological niche opened up.
D. Commercial whalers did not pursue minke whales until the more valuable whale species had declined.
Answer: D
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