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in Food for Thought

Action needed before overfishing depletes our waters

With overfishing able to create an imbalance that can erode the food web which can lead to the loss of other vulnerable marine life, corrective measures are needed before its too late

by Coty Perry
8th July 2022
In 2019, the small-scale fishing sector contributed more than R3 billion to South Africa's GDP. Photo: Rodger Bosch/Brand SA

Overfishing is everyone's problem considering the number of wide-reaching consequences. Photo: Rodger Bosch/Brand SA

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As with many other aspects of government policy, overfishing and other fishing-related environmental issues are a real problem, but it’s not clear that government intervention is the solution.

Indeed, it might be one of the main drivers of overfishing and other conservation and sustainability issues stemming from commercial fishing. Much like drone fishing, there are serious ethical issues of interest to the average angler. 

There’s another commonality that overfishing has with environmental issues more broadly: The Western companies primarily concerned with serious efforts to curb overfishing are not the ones who are most guilty of overfishing.

What this means is that the costs of overfishing are disproportionately borne by the countries least engaged in practices that are counter to efforts to make commercial fishing more sustainable while also promoting the conservation of fish biodiversity. 

All of these are important issues not just for commercial fishermen, but also those interested in questions of conservation and sustainability in general, as well as recreational fisherman and basically anyone who uses fish as a food source.

Tackling the problem

As the ocean goes, so goes the planet, so it is of paramount importance for everyone to educate themselves on what is driving overfishing, what its consequences are, and what meaningful steps — not simply theater to feel as if “something is being done” — can be taken.

Overfished ocean

Indeed, over three billion people around the world rely on fish as their primary source of protein. About 12% of the world relies on fisheries in some form or another. At least 90% of these are small-scale fishermen — “think a small crew in a boat, not a ship,” using small nets or even rods, reels and lures not too different from the kind you probably use.

There are 18.9 million fishermen in the world, with 90% of them falling under the same small-scale fisherman rubric discussed above.

Overfishing Definition: What is Overfishing?

First, take heart: As a recreational fisherman you are almost certainly not guilty of “overfishing.” This is an issue for commercial fishermen in the fishing industry who are trawling the ocean depths with massive nets to catch enough fish to make a living for themselves and their families, not the angler who enjoys a little peace and quiet on the weekends. 

Overfishing is, in some sense, a rational reaction to increasing market needs for fish. Most people consume approximately twice as much fish as they did 50 years ago and there are four times as many people on earth as there were at the close of the 1960s.

This is one driver of the 30% of commercially fished waters being classified as “overfished.” This means that the stock of available fishing waters is being depleted faster than it can be replaced.

There is a simple and straightforward definition of when an area is being “overfished” and it’s not simply about catching “too many” fish. Overfishing occurs when the breeding stock of an area becomes so depleted that the fish in the area cannot replenish themselves. 

Overfishing infographic "> 80% fish caught in nets"

Several consequences

At best, this means fewer fish next year than there are this year. At worst, it means that a species of fish cannot be fished out of a specific area anymore. This also goes hand-in-hand with wasteful forms of fishing that harvest not just the fish the trawler is looking for, but just about every other organism big enough to be caught in a net. Over 80% of fish are caught in these kinds of nets but fish aren’t the only things caught in nets.

What’s more, there are a number of wide-reaching consequences of overfishing. It’s not simply bad because it depletes the fish stocks of available resources, though that certainly is one reason why it’s bad. Others include: increased algae in the water; destruction of fishing communities; tougher fishing for small vessels; ghost fishing; species pushed to near extinction; bycatch; waste; and mystery fish.

So why is overfishing happening? There are a variety of factors driving over fishing such as regulation, unreported fishing, mobile processing, and subsidies.

Which countries are overfishing?

As stated above, the main offenders with regard to overfishing tend to not be developed Western countries, but countries from the undeveloped world and parts of Asia. Sadly, the United States is the only Western nation that appeared on a “shame list” put out by Pew Charitable Trusts. This is known as the Pacific Six. The other members include Japan, Taiwan, China, South Korea, and Indonesia. 

The list only refers to over fishing with regard to bluefin tuna, but it provides a snapshot of the face of overfishing internationally. Overfishing facts say that these six countries are fishing 80% of the world’s bluefin tuna. These countries took collectively 111,482 metric tons of bluefin tuna out of the waters in 2011 alone. 

However, when it comes to harmful subsidies there is a clear leader: China. A University of British Columbia study found that China provided more in the way of harmful subsidies encouraging overfishing than any other country on earth — $7.2 billion in 2018 or 21% of all global support. What’s more, subsidies that are more beneficial than harmful dropped by 73%.

Countries that are overfishing

The negative effects of overfishing are not taking place far away and in very abstract ways. They are causing communities right here in the United States to collapse. In the early 1990s, overfishing of cod caused entire communities in New England to collapse. Once this happens, it is very difficult to reverse. The effects are felt by the marine ecosystem but also by the people whose livelihoods depend on fishing. 

Another example of economic instability is the Japanese fish market. Japanese fishermen are able to catch far less fish than they used to, meaning that the Japanese are now eating more imported fish, often from the United States, than ever before. This creates a perverse situation where America exports most of its best salmon to other countries, but consumes some of the worst farmed salmon in the world today. 

Just how bad Is overfishing?

Surely overfishing can’t be that bad, right? The seas are just filled with tons of fish and it would take us forever to overfish to the point that they began to disappear entirely, right?

Think again. Overfishing is happening at biologically unsustainable levels. Pacific bluefin tuna, the type of fish discussed in the section above, has seen a 97% decline in overall population. This is important because the Pacific bluefin tuna is one of the most important predators in the ocean food chain. If it goes extinct the entire aquaculture will be irreparably disturbed. 

The first fish that disappear from an ecosystem are larger fish with a longer lifespan and reach reproductive age later in life. These are also the most desirable fish on the open market.

When these fish disappear, the destructive fishing operations do not leave the area: They simply move down the food chain to less desirable catches like squid and sardines. This is called “fishing down the web” and it slowly destroys the entire ecosystem removing first the predator fish and then the prey. 

There are broader effects on the ecosystem beyond just the fish, effects that resonate throughout the entire Atlantic and Pacific ocean. Many of the smaller fish eat algae that grow on coral reefs. When these fish become overfished, the algae grow uncontrolled and the reefs suffer as a result. That deprives many marine life forms of their natural habitat, creating extreme disruption in the ocean ecosystem.

What are some alternatives to government-driven overfishing?

While there are certainly policy solutions to rampant overfishing, not all solutions will come from government. For example, there are emerging technological solutions that will make bycatching and other forms of waste less prevalent and harmful. 

We must also recognise that current regulations simply do not work. In one extreme case, governments restricted fishing for certain forms of tuna for three days a year. This did absolutely nothing for the population of tuna, as the big commercial fishing companies simply employed methods to harvest as many fish in three days as they were previously getting in any entire year. 

This, in turn, led to a greater amount of bycatch and waste. Because the fishing operations didn’t have the luxury of time to ensure that they were only catching what they sought to catch, their truncated fishing season prized quantity over quality with predictable results. 

Protecting fish

Quotas, specifically the “individual transferable quota” scheme used by New Zealand and many other countries, do not seem to work as intended for a number of reasons. First, these quotas are, as the name might suggest, transferable. This means that little fishermen might consider it a better deal to simply sell their quota to a large commercial fishing operation rather than go to work for themselves and we’re back to square one. 

An alternative to the current system is one that balances the need for fish as a global protein source with a long-term view of the ecosystem, planning for having as many fish tomorrow as there are today and thus, a sustainable model for feeding the world and providing jobs.

Possible solutions

One way to do this would be to tie subsidies to conservation and sustainability efforts, rather than simply writing checks to large commercial fishing operations to build new boats and buy new equipment. Such a scheme would also prize smaller scale operations over larger ones. A more diversified source of the world’s fish would also be more resilient. 

When major protein sources are depleted forever, there will be intensified competition for the resources that remain. This also creates unrest in the countries that are less able to compete in a global market due to issues of capital and scale.

Even if you’re not concerned with overfishing and the problems it creates, it will soon be on your doorstep unless corrective measures are taken before it’s too late.

This article was originally written by Coty Perry and published on Your Bass Guy.

ALSO READ: Free State experimental farm is taking agri to next level

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Coty Perry

Tags: Aquacultureecosystemsfishing
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