EduNinja• State that some resources can be conserved and managed sustainably, limited to forests and fish stocks
The Canadian Government were concerned about overfishing at the Grand Banks in the Atlantic Ocean.
As a result, commercial fish stocks were monitored from 2002 until 2013.
The population data for four species of fish are shown in Fig. 4.1.
Fig. 4.1
Use the information in Fig. 4.1 to:
suggest the fish species that had the most carefully controlled fishing quotas between 2002 and 2013.
Give a reason for your choice.
A researcher investigated the population growth of fish for fish farming. The researcher stocked a farmer's lake with a small number of these fish and recorded the number of fish over the next five years. The researcher's results showed that the population of fish had increased exponentially.
It is predicted that wild fish stocks will decrease and become depleted because of overfishing.
Suggest ways in which governments can try to maintain the stocks of wild fish.
Fig. 5.1 shows an area of forest where some of the trees have been cut down.
Fig. 5.1
The loss of forests from parts of the world is assessed by satellite imagery. Table 5.1 shows data on the forests in Indonesia and Malaysia, two countries in South-East Asia which have large areas of forest.
Table 5.1
Many hectares of natural forest have been cleared in countries such as Malaysia and Indonesia for oil palm plantations. Both countries have also replanted forests to grow timber and other forest products.
Suggest why replanted forests and plantations are less useful for conservation than natural forest.
Fish are an important part of a balanced diet for many people.
Many fish stocks have declined.
Marine ecologists considered the three topics shown in Fig. 6.1 when they discussed the decline of fish stocks.
Fig. 6.1
Describe the key points for each of the three topics shown in Fig. 6.1.
Fig. 5.1 shows people fishing on a large scale and a small scale.
Fig. 5.1
All types of fishing can have a negative impact on fish stocks.
Discuss how governments can regulate fishing to maintain fish stocks.
Use the word sustainable in your answer.