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CoolRahim9090
CoolRahim9090
26.12.2020 • 
Biology

A fishprint provides a measure of a country’s fish harvest in terms of area. The unit of area used in fishprint analysis is the global hectare (gha), a unit weighted to reflect the relative ecological productivity of the area fished. When compared with the fishing area’s sustainable biocapacity (its ability to provide a stable supply of fish year after year, expressed in terms of yield per area), its fishprint indicates whether the country’s annual fishing harvest is sustainable. The fishprint and biocapacity are calculated using the following formulas:
The following graph shows the earth’s total fishprint and biocapacity between 1950 and 2000. Study it and answer the following questions.
1. Based on the graph,
a. In what year did the global fishprint begin to exceed the biological capacity of the world’s oceans?
b. By how much did the global fishprint exceed the biological capacity of the world’s oceans in 2000?

2. Assume a country harvests 18 million metric tons of fish annually from an ocean area with an average productivity of 1.3 metric tons per hectare and a weighting factor of 2.68. what is the annual fishprint of that country?

3. If biologists determine that this country’s sustained yield of fish is 17 million metric tons per year,
a. What is the country’s sustainable biological capacity?
b. Is the country’s annual fishing harvest sustainable?
c. To what extent, as a percentage, is the country undershooting or overshooting its biological capacity?

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