Land Use #1 Fishing and aquatic food production Flashcards
What are the ocean layers
Epipelagic
Mesopelagic
Bathypelagic
Abyssopelagic
Hadal
ocean layers
Epipelagic
- Surface - 200 m
- Most sunlight = most productive
- sunlight zone andwde range of temps
ocean layers
Mesopelagic
200-1000 meters
transition layer where its warm water to cold water
ocean layers
Bathypelagic
1,000 - 4,000 m
no sunlight high adapable speices live here
ocean layers
Abyssopelagic
- the Abyess
- pitch black (nearly freezing temps) with very few creatures living here
- 4000- 6000 meters
Ocean layers
Hadal
- 6,000+ m (deepest)
- highest pressure and freezing temp
Continental shelf
What is the Continental shelf
- Extension of continents under the seas and oceans
- Creates shallow waters
- holds 50% of waters nutrients
Continental shelf
Continental Shelf significance
Theres a lot more life at this level with things such as crabs and fish living there
Ocean life
Benthic
live on or in sea beds (floor or shelf)
ex crabs and star fish
Ocean life
Pelogic
live surrounded by water (not on land)
ex sharks and Tuna
What does UNCLOS stand for
United Nations Convention on the Laws of the Seas
What did the UNCLOS do
-Established legal ownership to a coastal nation extending 200 miles from shore (Exclusive Economic Zone)
Types of fishing
Purse-seine
encloses fish in a large bowl shaped net
captures surface level stuff (tuna and herring)
Types of fishing
Long-lining
Putting out lines up to 60 miles long w/ thousands of bated hooks
captures sharks and cod and tuna mostly
Types of fishing
Drift (gill) Net
Wall-like nets that hang up to 50 feet deep & rip the gills off fish as they swim through
Good for economy bad for ocean life
Trap & kill large quantities of unwanted fish, marine mammals, seabirds, & sea