Lesson Plan

Freeing the Elwha (Overfishing and Fisheries Collapses)

Fish net.

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Grade Level:
Sixth Grade-Eighth Grade
Subject:
Aquatic Studies, Biodiversity, Biology: Animals, Community, Ecology, Economics, Environment, Geography, Oceanography, Oceans, Wildlife Biology, Wildlife Management
Duration:
One Class Period
Group Size:
Up to 36
Setting:
classroom
National/State Standards:
Washington State Standards:
Science
EALR 1: Systems, EALR 4: Life Science: LS2D, LS1C
Social Studies
EALR 5: Component 5.2
Writing
EALR 2: Component 2.1, Component 2.2 Writes for different purposes.

Overview

What factors have led to the collapse of marine fisheries around the world?

Background

This lesson focuses on the recent collapse of marine fisheries across the world due to increased commercial fishing pressures, a result of increased technology coupled with the changing climate of marine environments related to greenhouse gas pollution. Collapsed fisheries include Pacific salmon, Atlantic cod, and Orange Roughy, among others. The collapse of these fisheries has resulted in dramatic shifts in food webs and ecological processes at sea and on terrestrial ecosystems. In addition, it has had major impacts on human coastal communities.

 

  • Fisheries- A fishery is an eco-region and an associated fish population used for commercial fishing purposes. Examples would be the salmon fishery of Alaska or the cod fishery of Newfoundland.
  • Collapse- When a harvestable species (usually fish) see their population or harvest rate drop to less than 10% of the original figure. It means that harvesting is no longer sustainable and the fish is in danger of economic extinction.
  • Fishfinder sonar- Fishfinder sonar uses sound waves to detect the location of fish, so that they can be harvested. Sound waves are sent from the ship and reflect off the bodies of fish. The time it takes for the sound waves to return to the ship and the angle of return indicate the distance and location of the fish.
  • Fish Farm- A facility used to raise commercially viable fish species from egg to adulthood to sell for the market.
  • Aquaculture- Raising aquatic organisms in contained units for the purpose of producing marketable products. This can include algae, shrimp, oysters, fish, and others.
  • Hatchery- A facility used to rear juvenile fish for the purpose of stocking rivers or lakes, producing fish for commercial fishing activities, or restoring endangered fish populations.


Materials

  • Lesson 18- Overfishing and Fisheries Collapses.pptx
  • The Grand Banks Collapse.doc
  • Marine Fisheries Management Assignment.pdf
  • Reflection Notes (printable handout)
  • Vocabulary notes (printable handout)


Procedure

Review Essential Question; introduce Guiding Question.

Students should take a few minutes to respond to the first reflection prompts. Discuss their answers and any questions they've generated.
Hand out the Vocabulary Notes. With this lesson you may want to define the words before presenting the PowerPoint Lesson.
Present the PowerPoint Lesson.
Show charts indicating the increased demand for seafood worldwide, the declines of salmon runs, and the collapse of fish stocks around the world.
 Have students read the article on the Grand Banks fisheries collapse.
Marine Fisheries Management Assignment.
Hand out the second Reflection Journal Page. Give students time for a final reflection the lesson.

Assessment

Marine Fisheries Management Assignment.pdf



Additional Resources

http://discovermagazine.com/1995/apr/twilightofthecod489
http://overfishing.org/

http://www.ted.com/talks/sylvia_earle_s_ted_prize_wish_to_protect_our_oceans.html

http://www.ted.com/index.php/talks/capt_charles_moore_on_the_seas_of_plastic.html

 

This is just amazing
http://www.ted.com/index.php/talks/david_gallo_shows_underwater_astonishments.html



Vocabulary

Fisheries
Collapse
Fishfinder sonar
Fish Farm
Aquaculture
Hatchery