Overfishing Project

Rayyan Maker

Presentation revolved around the causes, effects and solutions to overfishing.



Small mesh nets

Drift nets

Technological advances

Poor government regulation

LEDCs are less equipped to impose fishing laws

Wasteful practices e.g. shark finning and manta ray lung extraction.

Rapid population growth results in increased demand for fish, especially in countries where fish is a major part of the diet e.g Japan

Increased demand and dwindling fish stocks results in higher prices which provides a greater profit motive for fishermen to maximize their catch

Cultural practices such as Japanese dolphin killing festival and Danish whaling.


Dwindling fish stocks can result in shortages of food

Turtles, dolphins and seals can get caught in nets

Coral is damaged from nets and anchors

Certain species are at the brink of extinction such as the blue fin tuna

Many organisms are discarded

Sharks and mantas are only caught for a small piece of their body, the rest is thrown back into the ocean, and is not economically efficient

Small bait fish that are caught in nets are also discarded

Leads to imbalance in ecosystem as large pelagic species are targeted and organismal populations at lower trophic levels increase


Govt intervention such as marine reserves

Limit the amount of catch through fishing quotas

Make fishing seasonal and prohibit it during the breeding season to allow populations to recover

Ban illegal fishing practices such as the use of mesh and drift nets

Increase awareness on sustainable fishing and provide fishermen with incentives for sustainable fishing

Alternative fishing practices for subsistence level such as spearfishing

Increase recreational fishing in terms of tag and release and use the revenue to fund conservation

Have organizations to enforce fishing laws such as marine park rangers or the coast guard


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