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प्रश्न
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Physical factors affecting on fisheries
उत्तर
1. Fishing is one of the primary occupation which is dependent on nature.
2. Physical factors that affect fishing are as follows:
- Continental shelf: Wide expanse of the continental shelf with presence of shallow water. For example, North-West Pacific ocean which is below 200 metres of depth near Okhotsk Sea near China.
- Ocean currents: The coastal region where the warm and the cold ocean currents confluent and subsequent growth of abundant plankton occurs, development of fishing grounds or banks takes place there. For example, meeting of warm Kuroshio current with cold Oyashio current favours coastal area near Japan for fishing.
- Country’s specific factors: Lack of land and absence of other protein food makes island countries especially dependent on fish as a staple food. For example, Japan, Philippines.
- Broken coast line: It provides excellent portal facilities.
- Easy access to forests: Nearby forest provides wood for ship building.
3. In certain areas where the physical factors are favourable, the fishing activity is developed on a commercial level.
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संबंधित प्रश्न
Ideal location for fishing.
Write short notes on
Physical factors and fishing
Differentiate between:
Mining and Fishing.
What are the factors affecting commercial fishing?
Ideal location for fishing:
Assertion: Dogger Bank is famous for fisheries.
Reason: It has extensive continental shelf and availability of plankton.
Give geographical reason
Japan is leading in commercial fisheries.
Write short note
Favourable factors for fisheries
Read the following passage and answer the question given below
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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. |
- How the word petroleum is formed?
- How rocks with petroleum sources are formed?
- Which rock is more likely to contain oil?
- What minerals are present in the fuel currently in use?
Write in detail about fishing activity.
