1 / 23

(Western) Channel Case - study Channel Fisheries Model

(Western) Channel Case - study Channel Fisheries Model. cemare. Area of study: boundaries. Summary. 4000 vessels 1700 registered French (6- >25m) 1500 registered UK (4- >25m) Beam, otter, pelagic, dredge, line, nets, pots TACs (sole, plaice, monk, cod…..). Sole (VIIe). Monk. Landings.

jam
Download Presentation

(Western) Channel Case - study Channel Fisheries Model

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. (Western) Channel Case - study Channel Fisheries Model cemare

  2. Area of study: boundaries

  3. Summary • 4000 vessels • 1700 registered French (6- >25m) • 1500 registered UK (4- >25m) • Beam, otter, pelagic, dredge, line, nets, pots • TACs (sole, plaice, monk, cod…..)

  4. Sole (VIIe) Monk Landings Megrim Plaice (VIIe&d)

  5. UK Fleet structure > 10m: 69 beamers, 75 trawl, 43 net-line, 41 potters

  6. Model: structure

  7. Stocks in model (assessed) • Age structuredSurplus Prod • Bass 7a,f + g Edible crab • Bass inshore 7d Lobster • Bass offshore 7e inshore Scallops • Bass inshore 7e offshore Cuttlefish • Western Horse Mackerel • Whiting • Cod • Hake • Herring • North-east Atlantic Mackerel • Megrim • Monkfish ((1) L.bud and, (2) L. Pisc)) • Plaice d • Plaice f+g • Plaice e • Sole d • Sole e • Sole f+g 27 Age-structured / 4 SP

  8. Stocks not assessed (used previous) • Lemon sole • Brill • Turbot • Red gurnard and other • Red mullet • Flounder • Common dab • Pollack • Ling • Black bream • (Sole H-K) previous year • Many of these species to be assessed in new Working Group called WGNEW In addition (not comprehensively assessed): • Pilchard • Sprat • Squid • Whelk

  9. > 10m “Importance of species” (2003 – data) √ √ √ √ Coverage √ √ √ √ √ >80% >77% <10m √ √ √ √ √ √

  10. Technical interactions/Metiers • Define metiers using the Fishing Activity Database (FAD) • Trips are allocated by gear, area (species) • By value • Method: multivariate statistics • Hierarchical Agglomerative Clustering (HAC) • Size distributions (size of vessels)

  11. UK Fleets • 5 size categories • <7, 7-10, 10-15, 15-24, >24m • 6 main gear types • Towed gear • Beam trawl • Trawl (otter and mid-water) • Dredge • Pelagic • Static • Pots, net-line • Home ports • Southwest (Newlyn, Brixham and Plymouth) • Eastern (Poole, Hastings) • Other UK (mostly Scottish, some Welsh and other English)

  12. Example effort allocation15-24m (southwest)

  13. Cost structures (2004) Annual costs (£/vessel) fuel costs (l/day, price), other running costs (£/day) Crew shares (%), commissions (%) Capital costs vessel for depreciation VCU/Quota values Cost information based on survey returns from SEAFISH survey, earlier survey work (updated) and additional financial information provided by fishers (following meetings) Cost information validated at meetings with fishers (Sept and October) Fleet economic info in the model

  14. Days fished Inside and outside the area of the model External revenue From activity outside the area £/day – assumed constant Fishing powers Varies by vessel size and metier Other fleet information

  15. Prices • Vary by age class • Price grades derived from Newlyn market prices • length based classes • Converted to age specific prices based on length/age relationship • Can vary with level of landings • Advice from last meeting with industry reps (Feb 2006) suggested to keep prices constant

  16. Incorporating foreign fleets into the model • Fishing mortality of all external fleets included in the total mortality estimate • Total catch of “other” fleets estimated in similar fashion to UK vessels • Catch allocated to France, Spain, Belgium and Ireland in fixed proportions • Proportions vary by species

  17. Recreational fishing • Target species: • bass, cod, mackerel, plaice, pollack,whiting, other • Number of targeted trips • Changes with stock size based on Nautilus elasticity • Catch per trip • Changes in proportion with stock size

  18. Other components • Environmental impacts • Currently based on a damage index • Varies by metier • Damage is function of index and effort per metier • Regional economic model • Input/output model

  19. Validation Note: model no compliance model or enforcement costs

  20. Enforcement MFA report (2006)

  21. MFA report (2006) Enforcement - activity

  22. MFA report (2006) Consider: area with total - estimate costs for case study (could also request information?)

  23. Summary • Over quota (evidence of cod, sole) • Mesh size • Declaring Sole (VIIe) as sole landed in VIId(?) Other inputs: Imperial, MRAG, CEDEM Use model, update, single species, fleet?

More Related