1: E is wrong 5: A is wrong 15 r 5 Estimated sustainable yield o10 5 0 1960 1970

Question

1: E is wrong 5: A is wrong 15 r 5 Estimated sustainable yield o10 5 0 1960 1970 1980 1999 Year O This graph represents populations of predator/prey cycles. The estimated O The anchovy catch increases to 10 million metric tons every 30 years; it peaked again in 2000. ) The anchovy catch grew through 1970, after which there was rapid decline without recovery. sustainable yield represents the anchovy population size after recovery from overexploitation The anchovy population grew through about 1970, after which there was a rapid decline without recovery

Explanation / Answer

(C)

It is seen that there was a steady increase in anchovy landings between 1950-1970, which was followed by a sharp decline in the early 1970s. Catches was low during the mid-1980s, but after that steadily from the mid-1980s through the mid-1990s. From the mid-1990s through 2000, anchovy catches experienced a sharp decline followed by a quick recovery.

Some possible reasons for low catche can be blamed on overfishing, implementation of fishery closures or restrictions, or changes in ocean climate.

Although the failure of the anchovy harvest in 1972 was originally blamed on El Niño, it was discovered that overfishing also played a part. Harvests prior to 1972 had been over the estimated sustainable limit.

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