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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. Global Fisheries ….
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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
Fisheries by Their Nature are Extractive; They Alter the Natural Environment anthropogenic effect
#32=LA ($26.6M) #46=Ventura ($16.6M) #71 SB ($6.7M) 2004 landings by port
What Landings Mean • Landings are the required reporting of amounts of harvested fish • Landings are a function of … stock size, type of fishery, effort, technology, harvest policy, market & reporting honesty • Care must be taken in assessing time histories of landings
What is Catch?? • Catch = (Catchability) (Effort) (Biomass) Catchability is f(skill, technology,…) Effort is hours, # trawls, … = f(profit, …) Biomass is the stock abundance • Profit to fishery = (price) (Catch) – (Costs) Profit drives effort… Price = f(market, …) Costs = f(fuel, distance to port, biomass, …)
Shark Abalone Sea Urchin Lobster Rockfish Market Squid Commercial Fishery Landings in Santa Barbara
What we Fish? • Pelagics • sardine, anchovies, tuna, swordfish, … • Groundfish • “red snapper”, sea bass, rockfish, ... • Invertebrates • squid, sea urchin, abalone, lobster, Dungeness crab, • Macrophytes • kelp
California Commercial Landings Commercial Landings (M Lbs) Data from http://www.dfg.ca.gov/mrd/status/
California Commercial Landings Commercial Landings (M Lbs) Data from http://www.dfg.ca.gov/mrd/status/
California Commercial Revenue Commercial Revenues ($M)
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
California Recreational Fishery 1000’s trips (1998/99)
California Recreational Fishery Landings (1000 fish)
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%)
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
Squid Fishing at Night Red dots are squid boats
