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Published byMerilyn Hampton Modified over 9 years ago
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Fishing Food for human consumption – Globally, fish is ~20% of animal protein consumed Animal feed (both aquaculture & livestock) Natural products – Inverts, fish & kelp Cultural identification Direct employment for 200 M people globally
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Global Fisheries …
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Fisheries by Their Nature are Extractive; They Alter the Natural Environment anthropogenic effect
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California Marine Landings
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RankPortMillions of PoundsMillions of Dollars 1New Bedford, MA153.4282.5 2Dutch Harbor-Unalaska, AK887.6166.1 3Kodiak, AK337.295.8 4Hampton Roads Area, VA23.585.1 5Cape May-Wildwood, NJ74.668.4 6Honolulu, HI22.257.4 7Dulac-Chauvin, LA42.654.6 8Naknek-King Salmon, AK105.354.3 9Seward, AK60.552.2 10Cordova, AK111.246.5 11Gloucester, MA124.246.0 12Brownsville-Port Isabel, TX20.145.0 #32=LA ($26.6M) #46=Ventura ($16.6M) #71 SB ($6.7M) 2004 landings by port
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What Landings Mean Landings are the required reporting of amounts of harvested fish Landings are a function of … stock size, type of fishery, effort, technology, harvest policy, market & reporting honesty Care must be taken in assessing time histories of landings
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What is Catch?? Catch = (Catchability) (Effort) (Biomass) Catchability is f(skill, technology,…) Effort is hours, # trawls, … = f(profit, …) Biomass is the stock abundance Profit to fishery = (price) (Catch) – (Costs) Profit drives effort… Price = f(market, …) Costs = f(fuel, distance to port, biomass, …)
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Market Squid Lobster Abalone Rockfish Sea Urchin Shark Commercial Fishery Landings in Santa Barbara
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What we Fish? Pelagics – sardine, anchovies, tuna, swordfish, … Groundfish – “ red snapper ”, sea bass, rockfish,... Invertebrates – squid, sea urchin, abalone, lobster, Dungeness crab, Macrophytes – kelp
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California Commercial Landings Commercial Landings (M Lbs) Data from http://www.dfg.ca.gov/mrd/status/
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California Commercial Landings Commercial Landings (M Lbs) Data from http://www.dfg.ca.gov/mrd/status/
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California Commercial Revenue Commercial Revenues ($M)
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California Commercial Revenue 1999
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California Commercial Revenue 1999
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California Commercial Revenue 1999
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2010 CA Fisheries Summary Commercial landings (198,000 Mt) were up 23% compared with 2009 but a 22% decline from 2000 Ex-vessel values were nearly $175M, an increase of 56% from 2009 Market squid was biggest by landings (~130,000 Mt) and ex-vessel value ($73.8M) Large landings also for pacific sardine, northern anchovy, red sea urchin & pacific mackerel Large ex-vessel values also for Dungeness crab, chinook salmon, urchin & lobster 2010 CA Fishery Summary
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California Recreational Fishery 1000 ’ s trips (1998/99)
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California Recreational Fishery Landings (1000 fish)
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What Recreational Fisheries Catch? Man-made structures – SoCal – tuna/mackerel (39%), croaker (19%) – NoCal - silversides (31%), surfperch (27%) Beach – SoCal – surfperch (63%) NoCal – smelt (72%) CPFV – SoCal – rockfish (33%), sea bass (16%) – NoCal - rockfish (92%) Private – SoCal – sea bass (23%), tuna/mackerel (17%) – NoCal – rockfish (60%)
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How we Fish? Pelagics & Squid – purse seine, line, … Groundfish – trawl nets, gill nets, dredge, fish traps, … Invertebrates – hand collection, traps, trawl nets, … Macrophytes – kelp mower
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Purse Seine
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Anchovy Schooling
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Squid Fishing at Night
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Red dots are squid boats
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Purse Seines & Bycatch
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Line Fishing
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Long Lines
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Stern Trawls
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Otter Trawls
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Gillnets
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Urchin Diving
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Fish Traps
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Crab Pots
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Lobster Trap
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Kelp Harvester
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Kelp Landings
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