P2Unit1 Trends in Biotic Resource Use of the Oceans

Front

What are the key themes of the presentation on biotic resources of the oceans?

Back

The presentation focuses on the biotic resources of the oceans, particularly fish, highlighting the critical issue of overfishing, its causes, consequences, and potential solutions. It also touches on aquaculture as an alternative and its pros and cons.

Front

What are considered biotic resources of the oceans?

Back

Biotic resources include living ocean resources such as fish, invertebrates (lobsters, mussels), and mammals (seals, whales).

Front

What is meant by 'The Deep Oceans as Global Commons'?

Back

The deep oceans are described as 'global commons,' representing shared natural resources beyond national jurisdictions (Exclusive Economic Zones - EEZ). Sustainable use and protection from overexploitation require international cooperation.

Front

Where are the majority of fish caught?

Back

The majority of fish are caught on continental shelves, where nutrients are abundant.

Front

What is overfishing and its definition?

Back

Overfishing means that fish stocks are being depleted because fish are caught at a higher rate than they can regenerate, leading to depletion of fish stocks.

Front

What are some reasons for overfishing?

Back

Reasons include driftnets, bottom dragging nets, wasteful methods (bycatch), modern technology, and too many fishermen.

Front

What are the consequences of overfishing?

Back

Consequences include declining fish stocks, ecosystem disruptions, and fishing fleets moving to remote areas.

Front

What are some ways to reduce overfishing?

Back

Ways include fishing quotas, creating conservation areas, banning harmful fishing methods, and regulations on the size of net openings.

Front

What is aquaculture and its benefits?

Back

Aquaculture is the raising and harvesting of fish and other marine or freshwater organisms as an alternative. Benefits include helping replenish fish stocks and reducing pressure on wild populations.

Front

What are some negative consequences of aquaculture?

Back

Negative consequences include mangrove destruction, pollution, risk of escaped fish, and feeding carnivorous fish.