STU1033 Aquatic Science & Daily Life Unit 4 PDF

STU1033 Aquatic Science & Daily Life LU4: Seafood & Fisheries Resources Part 2 At the end of the unit, you should be able to: 1. Choose the fresh seafood in the market. 2. Know the function of related fisheries agencies in Malaysia. 3. Explain the fish catching methods....

STU1033 Aquatic Science & Daily Life LU4: Seafood & Fisheries Resources Part 2 At the end of the unit, you should be able to: 1. Choose the fresh seafood in the market. 2. Know the function of related fisheries agencies in Malaysia. 3. Explain the fish catching methods. Acknowledgement: Notes are adapted from OpenCourseWare@UNIMAS Types of fishing techniques Non-destructive Destructive **Almost all non-destructive techniques could fall into destructive category, especially when they are not carried in a proper manner ** Fishing Technique (non destructive) Recreational Fishing Subsistence Fishing Commercial Fishing Which is it??? Guess??? Recreational Fishing Hook & Line Coastal, deep sea, pond, “fishing shop” For leisure, family and friends week ends and holiday activity Annual competition e.g ‘Pertandingan Memancing Joran’, Bill Fishing Festival Subsistence Fishing Hook and line, cast net, gill net, manual harvesting of shellfish & seaweed-hand gathering/collection River, river mouth / estuary, coastal area Small scale: for domestic consumption or small side income or both Seaweed: hand gathering / collection Seaweed on the beach Local people collected seaweed for food  Commercial Fishing The activity of catching fish + other seafood from wild sources for commercial profit Fishing far into the ocean under adverse conditions It provides a large quantity of food to many countries around the world Large scale commercial fishing = industrial fishing  Harvest a wide variety of animals especially large and important fisheries worldwide for various species of fish e.g. herrings, sardines, cod, anchovy, tuna, flounder, crabs, lobster, etc. Many new restrictions are often integrated with varieties of fishing allocation schemes, international treaties that have sought to limit the fishing effort and capture efficiency. Methods used are very efficient: Large nets - trawl - seine nets - dredges - gill nets - traps Factory ships - a large ocean-going vessel with extensive fish processing facilities for processing and freezing fish caught.... Destructive fishing techniques Practices that result in irreversible damage to aquatic habitats and ecosystems E.g. dynamite or blast fishing, bottom trawling, cyanide fishing 1. Indiscriminately kill large numbers of fish and other marine organisms in the vicinity 2. Damage or destroy the environment Dynamite/ blast fishing using an explosive device that kills many fishes and other creatures under the sea Dynamite/ blast fishing Cyanide fishing Potassium cyanide is squirted directly at target fish species (e.g. grouper, Napoleon wrasse, etc.) paralyzing them and enabling them to be collected alive The cyanide then gets in to currents, it will travel along a reef wall, killing coral and wreaking havoc on marine life  Destructive fishing is common practice especially in poor and developing countries. Who is to be blamed? What is your opinion? Review Seaspiracy Reflection --END--