REPORT OF THE WORKSHOP ON TRAWL SURVEY ... - FAO.org

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(a) Landings 16000 Landings 14000 12000 10000 8000 6000 4000 2000 0 (b) Trends in fishing mortality 2.5 2.0 F(2-4): landings assumed correct 1.5 1.0 0.5 0.0 2.5 2.0 F(2-4): catch bias estimated for 2000-2005 1.5 1.0 0.5 0.0 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 Landings (t) 1992 1994 1996 1998 2000 2002 2004 2006 F(2-4) F(2-4) Fig. 6. Irish Sea cod assessment. (a) shows the time series of official landings (solid line), WG estimates of total landings based on a sampling scheme (solid squares) and estimates of total removals and 95% confidence intervals from B-Adapt run using WG landings estimates to 1999 and official landings from 2000 onwards. (b) retrospective trends in F-estimates when no bias is estimated for 2000 onwards (top plot) and when bias is estimated using B-Adapt (bottom plot) 62
Fig. 7. Density distribution of 1-year-old and 5-year-old haddock from the strong 1999 year class, as given by catch rates of the IBTS Quarter 1 survey. (from ICES FishMap: www.ices.dk) Fig. 8. Haddock in the North Sea and Skagerrak: Within-survey correlations for IBTS Q1 (back-shifted: note that age 5 is a plus-group) for the period 1982-2005. Individual points are given by cohort. 63
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REPORT OF THE WORKSHOP ON TRAWL SUR
Page 3 and 4:
Maritime Districts of Ancona and Sa
Page 5 and 6:
Indicators 11. Nine presentations w
Page 7 and 8:
Papaconstantinou C.) Abstract: Abun
Page 9 and 10:
• The use of robust parameters of
Page 11 and 12: • Identify the data requirements
Page 13 and 14: Terms of reference • Inventory of
Page 15 and 16: Roberto CARLUCCI Department of Zool
Page 17 and 18: Giuseppe LEMBO COISPA Tecnologia &
Page 19 and 20: Abdellah SROUR GFCM Deputy Executiv
Page 21 and 22: Position of hauls Spring 2005 Fall
Page 23 and 24: Overview of the series Period Vesse
Page 25 and 26: l’isobathe de 300 m se situe à 2
Page 27 and 28: Annexe I : Schéma de Chalut à cre
Page 29 and 30: Gear details Area Sampling design M
Page 31 and 32: COUNTRY: Serbia and Montenegro GSA:
Page 33 and 34: Data management Quality control We
Page 35 and 36: Position of hauls 46° 41° 36° 31
Page 37 and 38: Fig. 2. Diagram of the rigging. 37
Page 39 and 40: Fig. 4. Drawing of a door Morgère
Page 41 and 42: Overview of the series Period Vesse
Page 43 and 44: estimates against abundance indices
Page 45 and 46: placing a few tows at random within
Page 47 and 48: variation of catch rates did not va
Page 49 and 50: could be treated as separate. Some
Page 51 and 52: egg surveys are carried out, led to
Page 53 and 54: (i.e. ratios Ln (N a+1,y+1 /N a,y )
Page 55 and 56: are each divided into two separate
Page 57 and 58: Pomarede, M., Hillary, R., Kell,L.,
Page 59 and 60: Fig. 2. Station positions of the IB
Page 61: Fig. 5. Scanmar measurements of hea
Page 65 and 66: Fig. 11. North Sea haddock: Correla
Page 67 and 68: Mean total mortality Spawning stock
Page 69 and 70: Haddock SSB trends from raw survey
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REPORT OF THE WORKSHOP ON TRAWL SURVEY ... - FAO.org

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