Fisheries http://www.pbs.org/emptyoceans/ Traditional food production and distribution practices are unable to feed the world’s 6.3+ billion people Will resources in the sea be able to provide enough food to alleviate future problems of malnutrition and starvation ?
Traditional food production and distribution practices are unable to feed the world’s 6.3+ billion people
Will resources in the sea be able to provide enough food to alleviate future problems of malnutrition and starvation ?
Country 1995 1999 2000
China 11 15 14.8
Peru 8.9 8.4 10.6
Japan 5.9 5.1 4.9
United States 5.2 4.7 4.7
Chile 7.4 5.0 4.3
World Commercial Catch of Marine Fishes, Crustaceans, and Mollusks (1995)
Species Group Millions of Metric Tons, Live Wt.
Herrings, sardines, anchovies 22.0
Jacks, mullets, sauries 11.2
Cods, hake, haddock 10.6
Redfish, basses, conger eels 7.0
Tunas, bonitos, billfish 4.7
Mackerel, snooks, cutlass fishes 4.7
Flounders, halibut, soles 0.9
Miscellaneous marine fishes 17.7
Total (excluding marine mammals) 94.6
from the Sea
= El Niño
El Niño Year
Magnuson Act passed & prevented foreigners from fishing in U.S. waters
Fishery technology intensified and resulted in overfishing
Harvests were beyond the max. sustainable yield
Georges Bank closes after collapse
Some fish stocks begin to rebound
20 m x 65 km
Allow nations to claim jurisdiction over their territorial seas (contiguous sea beds and their waters that extend off shore by 12 nautical miles)
F. Bycatch (or bykill): animals unintentionally killed during harvest of the target species
Trawling: Bycatch in shrimp trawling is very high (125 to 830% of the catch is discarded as bycatch), turtles often caught in trawls.
SOLUTION: trawls with trap doors to let turtles escape
Purse seine: Tuna known to hang out under pods of dolphins, nets set around pods of dolphins would result in many drowning.
SOLUTIONS: Nets not set around dolphin pods and/or employ — “backing down”, a technique that lowers upper edge of net letting dolphins escape
Dolphins caught in tuna net
(marine agriculture)- farming finfish, shellfish and algae under favorable conditions
One of every four fish eaten today was raised in either a fw or sw fish farm.
- inexpensive to grow
- grows quickly
- high sales price
- resistant to disease and parasites
May wash up