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Question
What are the factors affecting commercial fishing?
Solution
The following factors affect commercial fishing.
- Extensive continental shelf with shallow water. For example, Dogger Bank fishing area.
- Confluence of warm and cold ocean water currents, which is favourable for the growth of plankton. For example, Gulf warm ocean current and Labrador cold current meet together near Dogger Bank on the North Eastern coast of North America.
- Broken coastline for the development of ports.
- Traditional skills of some local people who are experts in fishing.
- Large size of the population provides demand for fish.
- Limited land to grow protein-rich food, so fish becomes the staple food of people.
- Use of advanced fishing boats and fishing nets.
- Cool climate for natural preservation of fish.
- Forest resources to provide wood for the shipbuilding industry.
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The word petroleum is derived from the original Latin words petra and olium. Petra means rock and oleum means oil. Petroleum is a mixture of several types of hydrocarbons. The stratified rock in which the remains of marine microbial plant plankton (phytoplankton), algae and bacteria are found; such stratified rocks produce oil and natural gas. The remains of marine flora and fauna are stored at the bottom of the ocean, and silt accumulates and is buried beneath the silt layer. Due to the weight of the sludge and the heat generated from it, the organic matter deposited under the sludge is converted into droplets of fine oil. When the temperature of organic matter is reaches up to 120 degrees Celsius, then the organic matter is converted into oil particles. These oil particles penetrate into the microscopic pores of the rock and thus form rocks with a source of petroleum. Sandstones with high porosity are more likely to contain oil. It consists mainly of biofuels. The fuels currently in use include minerals such as coal, petroleum, natural gas and atoms. |
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