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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
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
slide3

Fisheries by Their Nature are Extractive; They Alter the Natural Environment

anthropogenic

effect

what landings mean
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
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, …)

slide8

Shark

Abalone

Sea Urchin

Lobster

Rockfish

Market Squid

Commercial Fishery Landings in Santa Barbara

what we fish
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
California Commercial Landings

Commercial

Landings

(M Lbs)

Data from http://www.dfg.ca.gov/mrd/status/

california commercial landings1
California Commercial Landings

Commercial

Landings

(M Lbs)

Data from http://www.dfg.ca.gov/mrd/status/

california commercial revenue
California Commercial Revenue

Commercial

Revenues

($M)

2010 ca fisheries summary
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
California Recreational Fishery

1000’s trips

(1998/99)

what recreational fisheries catch
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
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 night1
Squid Fishing at Night

Red dots are squid boats