8483325
Descrição
FlashCards por aayet fatima, atualizado more than 1 year ago
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Criado por aayet fatima
mais de 7 anos atrás
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| Questão | Responda |
| FISHING | 1. Marine fishing 2. Inland fishing |
| 1. MARINE FISHING | A. Subsistence fishing B. Commercial fishing |
| A. SUBSISTENCE FISHING | fisherman and family consumes what is caught conventional methods used e.g traditonal net, small wooden sail boat ...nominal fish catched..not as a permanent source of income |
| B. COMMERCIAL FISHING | Fish is sold in market as source of income 2 main centres: gwadar n karachi gill netters n mechanized boats used makran coast's developing |
| 2. INLAND FISHING | all lakes n rivers... the reservoirs specially dug ponds |
| FISH FARMS | rectangular man-made ponds for breeding fish cement base: prevent water loss mud edges: trees: oxygen, keep water cool |
| GOVT. EFFORTS TO DEVELOP FISHERIES | intro of new fishing techniques development of value added products weather broadcasting help |
| SOCIO ECONOMIC BENEFITS OF FISH FARMING | -greater return to fishermen - employment increases - technology will increse fish production - foreign exchange earnings - reduce burden on crops n livestocks and |
| FISH FARMING AND THE ENVIRONMENT | 1. Effects on ecosystem 2. Chemical pollution 3. Recycling wastes |
| EFFECTS ON ECOSYSTEM | -lower watertable as water is pumped in farms salitation |
| CHEMICAL POLLUTION | Chemicals used have adverse affect on environment used for inducing, breeding n transfer of fish |
| RECYCLING WASTES | aquaculture help in recycling of domestic n farm wastes used as good organic fertilizer |
| PROBLEMS FOR FISHING INDUSTRY | 1. water pollution 2. over-fishing 3. threat to mangroves |
| WATER POLLUTION | limited to karachi spillage of oil n domestic n industrial waste, numerous harmful chemicals are found in marine fish, so they enter humans by food chain, chemical fertilizers WATER DISPOSAL NEEDS TO BE SETUP |
| 2. OVER FISHING | over fishing of shrimps also in breeding system this prob is due to foreign trawlers limits shrimp production |
| 3. THREAT TO MANGROVES | mangroves act as barrier they protect coastlines from high n low tides they are breeding grounds for fish n shrimps they cant thrive well in polluted sea water |
| SUSTAINABLE FISHERIES (hindrances) | - over fishing - catching baby fish - use of illegal nets - destruction of mangroves - water pollution extincts fish species |
| SUSTAINABLE FISHING (methods) | - restrict foreign deep-sea trawlers to avoid over fishing - ban illegal nets which catch baby fish - strict enforcement against cutting of mangroves - restrictions regarding water pollution |
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