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EESB16H3 (16)
Lecture

Lec 12 - Fish packaging.docx

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Department
Environmental Science
Course Code
EESB16H3
Professor
Zachariah Campbell

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Fish
- Oceanic fishing is the equivalent of hunting land animals  not sustainable in oceans
oWe have gradually shifted to smaller fish as serial stock depletions have taken
place
o“Fishing down the food chain”: as we fish one economically important fish, we
move down to the next one
We are left with more and more of the little fish because we have gotten
rid of highest trophic level, so smaller sized fish populations aren’t
regulated
Whale population has greatly dwindled
oIUU = illegal, unregulated, unreported  lots of piracy on ocean outside regulated
areas
oDiscards =
- Blue fin tuna are one of the largest of tuna…this is what goes into expensive sushi, and
now they have been overharvested
oEach fish is $100-$1000, not even by weight
oWe use yellow fin now and other smaller tuna for grocery stores
- Industrialized fishing gear: steam trawlers etc. ****
- Sometimes net catches deep sea fish along with tuna
- Long line fishing uses a 1-100 mile long string with hooks, to capture fish of different
levels
oPelagic form of long line fishing gets fish from higher levels of water for long
distances
- Deep sea mounts = underwater mountain ranges
oThey support growth of coral reef because they are close enough to the surface
to get sunlight
- We can’t measure fish stocks; we can only estimate based on what we’ve caught and
use mathematical models
oCatch Per Unit Effort is assumed to be proportional to the total fish population
based on amount of time, energy, equipment was used to catch how much fish
Packaging
- Forests are cleared for agricultural production directly
- Global paper consumption increased by factor of twenty

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Description
FishOceanic fishing is the equivalent of hunting land animalsnot sustainable in oceans oWe have gradually shifted to smaller fish as serial stock depletions have taken place oFishing down the food chain as we fish one economically important fish we move down to the next oneWe are left with more and more of the little fish because we have gotten rid of highest trophic level so smaller sized fish populations arent regulatedWhale population has greatly dwindledoIUUillegal unregulated unreportedlots of piracy on ocean outside regulated areas oDiscardsBlue fin tuna are one of the largest of tunathis is what goes into expensive sushi and now they have been overharvested oEach fish is 1001000 not even by weight oWe use yellow fin now and other smaller tuna for grocery stores Indus
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