Marine Aquaculture
Bayani Gaba-gaba
For most of human history the sea seemed an endless larder. We hunted fish the way our distant ancestors hunted game, simply taking as much as we could. But modern boats, giant nets and sonar have made us so efficient that wild fish stocks are collapsing one after another. The great question for the oceans is no longer how to catch more fish, but how to keep catching fish at all.
In this lesson you will learn how overfishing damages target species, bycatch and whole food chains, and how marine aquaculture, the farming of fish, shellfish and seaweed, is being used to take the pressure off wild stocks. You will weigh the real benefits and the real risks of fish farming, and study the management strategies, from mesh sizes and quotas to closed seasons and international agreements, that aim to make fishing sustainable.
Manufura
- 3.4.1 Describe and explain the impacts of exploitation of marine species, limited to: (a) overfishing and overharvesting of marine species (b) effect on target and bycatch species (c) effect on food chains.
- 3.4.2 Define marine aquaculture as the farming of marine species in captivity, limited to: (a) fish (b) crustaceans (c) seaweeds. Knowledge of specific species is not required.
- 3.4.3 Describe and explain the impacts of marine aquaculture, limited to: (a) reduced exploitation of natural fisheries (b) increased food supply for humans (c) risk of escape (d) risk of disease (e) local food webs (f) nutrient enrichment from waste (g) energy usage (h) source of food for farmed species.
- 3.4.4 Describe and explain strategies for the management of the harvesting of marine species, limited to: (a) limits on size of boat and overall net size (b) increased mesh size of nets (c) sustainable methods: pole and line (d) quotas (e) closed seasons (f) limited number of fishing days (g) protected areas (h) conservation laws (i) international agreements: implementation and monitoring.
- 3.4.5 Discuss the benefits and limitations of strategies for management of the harvesting of marine species.
Takardar Darasi
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan Marine Aquaculture. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Overfishing means catching fish: A. only during the breeding season B. faster than they can reproduce C. with pole and line D. inside a protected area Answer: B
- Marine aquaculture is best defined as: A. catching wild fish with large nets B. the farming of marine species in captivity C. protecting fish breeding grounds D. setting quotas on catches Answer: B
- Increasing the mesh size of a net helps a fishery because it: A. catches more fish B. lets young fish escape to breed C. uses less fuel D. reduces the boat size Answer: B
- Animals caught that are not the intended target are called: A. quota fish B. bycatch C. farmed fish D. juveniles Answer: B
- Which method produces almost no bycatch? A. bottom trawling B. drift nets C. pole and line D. dredging Answer: C
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Marine Aquaculture? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
