Geography HL
Geography HL
13
Chapters
193
Notes
Option A - Freshwater – Drainage basins
Option A - Freshwater – Drainage basins
Option B - Oceans & Coastal Margins
Option B - Oceans & Coastal Margins
Option C - Extreme Environments
Option C - Extreme Environments
Option D - Geophysical Hazards
Option D - Geophysical Hazards
Option E - Leisure, Tourism & Sport
Option E - Leisure, Tourism & Sport
Option F - The Geography Of Food & Health
Option F - The Geography Of Food & Health
Option G - Urban Environments
Option G - Urban Environments
Unit 1 - Changing Population
Unit 1 - Changing Population
UNIT 2 - Global Climate - Vulnerability & Resilience
UNIT 2 - Global Climate - Vulnerability & Resilience
Unit 3 - Global Resource Consumption & Security
Unit 3 - Global Resource Consumption & Security
Unit 4 - Power, Places & Networks
Unit 4 - Power, Places & Networks
Unit 5 - Human Development & Diversity
Unit 5 - Human Development & Diversity
Unit 6 - Global Risks & Resilience
Unit 6 - Global Risks & Resilience
IB Resources
Option B - Oceans & Coastal Margins
Geography HL
Geography HL

Option B - Oceans & Coastal Margins

The Domino Effect How Overfishing Disrupts Global Ecosystems & Economies

Word Count Emoji
665 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Introduction - the world's fishing plate

Fact Fun: The world's fisheries and aquaculture contributed almost 160 million tonnes of fish in 2012, valued at over $215 billion. It's a lot of fish, but more impressively, it's the amount of money that makes it "reel"ly significant!

 

Food fish supply has grown from 9.9 kg per person in the 1960s to 19 kg in 2012.

 

Asia has a massive appetite for fish, accounting for two-thirds of total consumption.

 

Though low-income countries have seen an increase in fish consumption, high-income countries still consume more, but China is closing the gap!

 

Let's appreciate China for a moment. China's share in world fish production grew from 7% in 1961 to 35% in 2010. That's a huge jump!

 

Real-world Example: Think of all the sushi you love. Where's it coming from? A big chunk is from Asia, which loves fish so much, it consumed 85.4 million tonnes, and 42.8 million tonnes was consumed outside China. That's a lot of sushi!

The fish pyramid - the decline of fish stocks

Fact Fun: Fishing fleets now catch fewer large predatory fish (like the mighty cod) but more smaller fish further down the food chain. This impacts both the type of fish available for human consumption and could also cause a lasting change in marine ecosystems.

 

Overfishing of top-level predators like cod leads to an increase in smaller fish populations.

 

Although we have larger boats and better technology, catches of species like cod are decreasing. Some species have even become extinct!

 

Real-world Example: Imagine playing a video game where you're fishing. But the catch? There are fewer big, valuable fish, and more small, less valuable ones. As the number of top-level predators falls, the number of smaller fish increases. So, while the total number of fish remains high, the type of fish is changing. We're losing the big guys!

Money down the drain - inefficient fishing practices

Fact Fun: A World Bank and FAO report showed that poor management, inefficiency, and overfishing cause up to $50 billion in losses per year for world fisheries. Also, despite investments in technology, fish stocks are so depleted that it takes more effort to find and catch the remaining fish.

 

The world’s fisheries capacity continues to grow but, due to over-capacity, much of the investment in new technology is wasted.

 

Real-world Example: Ever tried to catch butterflies with a net, but there were only a few butterflies left? It's kind of like that with fishing, too. There's plenty of capacity to catch fish (imagine lots of big nets), but fewer fish to catch. That’s the sad reality of overfishing!

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IB Resources
Option B - Oceans & Coastal Margins
Geography HL
Geography HL

Option B - Oceans & Coastal Margins

The Domino Effect How Overfishing Disrupts Global Ecosystems & Economies

Word Count Emoji
665 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Introduction - the world's fishing plate

Fact Fun: The world's fisheries and aquaculture contributed almost 160 million tonnes of fish in 2012, valued at over $215 billion. It's a lot of fish, but more impressively, it's the amount of money that makes it "reel"ly significant!

 

Food fish supply has grown from 9.9 kg per person in the 1960s to 19 kg in 2012.

 

Asia has a massive appetite for fish, accounting for two-thirds of total consumption.

 

Though low-income countries have seen an increase in fish consumption, high-income countries still consume more, but China is closing the gap!

 

Let's appreciate China for a moment. China's share in world fish production grew from 7% in 1961 to 35% in 2010. That's a huge jump!

 

Real-world Example: Think of all the sushi you love. Where's it coming from? A big chunk is from Asia, which loves fish so much, it consumed 85.4 million tonnes, and 42.8 million tonnes was consumed outside China. That's a lot of sushi!

The fish pyramid - the decline of fish stocks

Fact Fun: Fishing fleets now catch fewer large predatory fish (like the mighty cod) but more smaller fish further down the food chain. This impacts both the type of fish available for human consumption and could also cause a lasting change in marine ecosystems.

 

Overfishing of top-level predators like cod leads to an increase in smaller fish populations.

 

Although we have larger boats and better technology, catches of species like cod are decreasing. Some species have even become extinct!

 

Real-world Example: Imagine playing a video game where you're fishing. But the catch? There are fewer big, valuable fish, and more small, less valuable ones. As the number of top-level predators falls, the number of smaller fish increases. So, while the total number of fish remains high, the type of fish is changing. We're losing the big guys!

Money down the drain - inefficient fishing practices

Fact Fun: A World Bank and FAO report showed that poor management, inefficiency, and overfishing cause up to $50 billion in losses per year for world fisheries. Also, despite investments in technology, fish stocks are so depleted that it takes more effort to find and catch the remaining fish.

 

The world’s fisheries capacity continues to grow but, due to over-capacity, much of the investment in new technology is wasted.

 

Real-world Example: Ever tried to catch butterflies with a net, but there were only a few butterflies left? It's kind of like that with fishing, too. There's plenty of capacity to catch fish (imagine lots of big nets), but fewer fish to catch. That’s the sad reality of overfishing!

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Geography HL. Subscribe now and get closer to that 45 🌟