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Examine the graph, which shows that fish stocks have become depleted over time in part of the Irish Sea - Junior Cycle Geography - Question C - 2005
Question C
Examine the graph, which shows that fish stocks have become depleted over time in part of the Irish Sea. Answer the questions which follow. (i) Calculate the decrea... show full transcript
Worked Solution & Example Answer:Examine the graph, which shows that fish stocks have become depleted over time in part of the Irish Sea - Junior Cycle Geography - Question C - 2005
Step 1
Calculate the decrease in fish stocks shown between 1960 and 1990.
Answer
To calculate the decrease in fish stocks from 1960 to 1990, we first identify the fish stocks in each year from the graph. In 1960, the fish stocks were approximately 50,000 tonnes and by 1990, they had decreased to about 16,000 tonnes.
Thus, the decrease can be calculated as follows:
The decrease in fish stocks between 1960 and 1990 is therefore approximately 34,000 tonnes.
Step 2
Describe two possible reasons for the depletion in fish stocks in the seas around Ireland.
Answer
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Overfishing due to technological advancements: With the improvements in fishing technology during the 1960s and 1970s, including the development of larger and more efficient fishing boats, fish catches increased significantly. This overfishing led to the depletion of many fish stocks as they could not sustain the high levels of harvesting.
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Increase in foreign fishing fleets: The number of foreign factory ships fishing in the Irish Sea also increased, leading to greater competition for fish resources. This intensified fishing pressure contributed to the overall decline in fish stocks as both local and foreign fisheries exploited the same resources without sustainable practices.