Marine Aquaculture
Overzicht
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.
Doelstellingen
- 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.
Lesnotitie
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Lesevaluatie
Gefeliciteerd met het voltooien van de les op Marine Aquaculture. Nu je de sleutelconcepten en ideeën, het is tijd om uw kennis op de proef te stellen. Deze sectie biedt een verscheidenheid aan oefeningen vragen die bedoeld zijn om uw begrip te vergroten en u te helpen uw begrip van de stof te peilen.
Je zult een mix van vraagtypen tegenkomen, waaronder meerkeuzevragen, korte antwoordvragen en essayvragen. Elke vraag is zorgvuldig samengesteld om verschillende aspecten van je kennis en kritisch denkvermogen te beoordelen.
Gebruik dit evaluatiegedeelte als een kans om je begrip van het onderwerp te versterken en om gebieden te identificeren waar je mogelijk extra studie nodig hebt. Laat je niet ontmoedigen door eventuele uitdagingen die je tegenkomt; beschouw ze in plaats daarvan als kansen voor groei en verbetering.
- 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
Beschikbaar in de Green Bridge-app
Download de Green Bridge CBT-app op je telefoon of computer voor toegang tot volledige lesnotities, oefenvragen en meer.
Beschikbaar in de Green Bridge-app
Download de Green Bridge CBT-app op je telefoon of computer voor toegang tot volledige lesnotities, oefenvragen en meer.
Aanbevolen Boeken
Oefen Proefexamenvragen
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