Résultats de la recherche

1. Integration of CPUE data into assessments using the Generalised Yield Model

   / Description:  For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ... year Y is the latest year for which we have data from the fishery, and simulation years Y+l to Y+P ... for fishable biomass, but in two years (1996 and 1997), they fall just outside. The second proposed ... Group on Fish Stock Assessment (WG-FSA) has had available to it two indicators of stock status for ... abunda~lce of the stock in a given year for each trial is provided in output tables. In tlie absence of ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Auteur(s): Kirkwood, G.P. and A.J. Constable

2. Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited

   , sparse, being restricted to the two seasons (1978/79 and 1979/80) when Polish and GDR vessels fished in ... Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two islands at ... two concentrations of C. wilsoni at 62°20’–62°30’S 55°30’–56°00’W in the northern part of the shelf ... the west. Two- to four-year-old fi sh lived pelagically at 20–120 m over depths of 200–400 m ... . wilsoni spent one or two years in midwater and subsurface waters and moved with the coastal current to ... , being restricted to the two seasons (1978/79 and 1979/80) when Polish and GDR vessels fi shed in the ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Auteur(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina

3. A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies

   aged. Subsampling of random lengthfrequency (LF) data used to obtain the samples of fish for ageing ... -estimated parameters. A young-age adjustment (less than 5 years old) to the VB model is also given in order ... Paper Title:  A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age ... data and compared to observed growth from mark–recapture studies Abstract / Description:  Length-at-age ... – 20 year range. This translated to larger predictions for the MLPLB-fi tted curve for ages below 5 ... –age frequency data in the complete catch rather than just the aged random subsample. The diffi culty ... sh that were aged. Subsampling of random length- frequency (LF) data used to obtain the samples of fi ... probabilities may be involved in selecting fi sh from the LF sample. One sampling scheme that could be used is ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Auteur(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams

4. Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996

   from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years of ... for finfishing from 1989/90 onwards. Results of the first bottom trawl survey carried out after the ... class; fish from this year class were 20 to 25 cm long in January/February 1976 and 30 to 37 cm in ... 1976 to 1996. Kock Length (cm) 10 20 30 40 50 60 70 80 Length (cm) 1978: no data 10 20 30 ... 564 Kock 80"W Latitude 20°W Weddell Sea km m 0 200 400 70"s . - Figure 1: Area of ... ) 10 20 30 40 50 Length (cm) Length (cm) m S 6 - 3 5 - 5 4 - 10 20 30 40 50 Length (cm ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Auteur(s): Kock, K.-H

5. Estimating optimal observer coverage in the Antarctic krill fishery

   : observers have been placed on approximately 50% of vessels fishing in any one season, and have been present ... on board for about 30% of that season. They have achieved a rate of krill sampling equivalent to 18 ... vessels sampled each season, 20% of total season hauls sampled for krill and an equivalent or higher ... . The South Georgia data suggest that such strategies should be pursued for at least four years before ... 32 Fo ro s 20 02 25 0 90 72 80 28 29 39 11 N iit ak a M ar u 20 ... ar u 20 07 66 1 15 7 48 31 20 7 42 3 Sa ga S ea 20 07 30 3 30 7 ... st in 20 08 71 55 21 38 21 30 10 0 30 A ve ra ge s 62 ... this dataset, whether one year of full observer coverage would have been equivalently adequate to ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Auteur(s): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards

6. An assessment of the impact of krill fishery on penguins in the South Shetlands

   tonnes/10-20-day period), the present catch rate (≤10  x 10 3 tonnes/1O-day period) is smaller by one or ... ) fishery and penguins during the penguins' breeding season (December to March) in the South Shetland ... 20 or 30 X 30 n miles from recent surveys (1989/90 and 1990/91). The krill biomass for each of ... respective colonies for chinstraps, 80 km for Adklies and 20 km for gentoos (Everson, 1987; Trivelpiece et ... 10 to 20 days, the present catch rate (S10 X 103 tonnes/lO-day period) is smaller by one or more ... X 103 tonnes) and its variability (the order of 100 X 103 tonnes/10-20-day period), the present ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Auteur(s): Ichii, T., M. Naganobu and T. Ogishima

7. Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea

   continental slope and shelf of the Ross Sea at depths from 30 to 120 m, during the Italian expeditions of 1997 ... specific ventral sacs (from 12–15% of first year to 20–32% dry weight (DW) of second year; DeVries and ... 21 41 8 45 3 20 9 56 93 3 30 11 5 47 13 7 % b y nu m be r 82 .3 % 82 .9 ... juvenile stages (size: 45–48 mm; age: second year), coinciding with an increase in lipid content in the ... , for (krb) ranging from 0.2 to 20 is similar to that of a high-pass filter, however, the non-linear ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Auteur(s): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi

8. Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons

   's third depletion square. The assumptions of the mark-recapture model were probably violated, but ... liberty for about one to five weeks. The recaptured crabs had minimum movement rates of 0.08 to 0.25 n ... attempts were made to account for biased sampling of recaptured crabs and the movement of crabs away from ... crabs were at liberty for about one to five weeks. The recaptured crabs had minimum movement rates of ... movement of crabs away from their release sites. Density estimates from the mark-recapture data were in ... extended (in a slightly revised format) for another three f ishing seasons (to the 1997/98 split-year ... adhere, is set out in CCAMLR Conservation Measure 90/XIV. Conservation Measure 90/XIV outlines the ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Auteur(s): Watters, G

9. Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica

   mature at about 340–360 mm total length (TL) and about 3–4 years of age, and that 95% were mature at ... about 370–400 mm TL and 6–8 years of age. Counts of growth zones in sectioned otoliths were used to ... , meristics, reproductive biology, diet and age estimation. All of the icefish sampled were identified as ... Chionobathyscus dewitti, and showed no significant difference in sex ratio. Meristic, diet and age data were ... ). All of the possible prey items were in advanced stages of digestion, except for two fish eggs. One ... , there is a lack of small fish (≤30 cm; age ≤ 1), and so the von Bertalanffy growth curve parameters ... Introduction There are about 15 species of icefish (Chan- nichthyidae), all but one of which are found in the ... . Eight species of icefish have been reported caught in the fishery in the CCAMLR vessel log- book (C2 ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Auteur(s): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott

10. Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997

    account for 20% of the total mass (Kock, 1992; Everson et al., 1996). Arising from this, we envisage two ... success. Year ct FUSE CEPE MAPE Nov Dec Jan Feb Mar Trip Surv Meal S Meal S Comparison of Condition ... . Condition indices o f mackerel icefish at South Georgia One using gutted mass is likely to respond with a ... slight time delay and have a lower variance with respect to one using total mass. In this study we ...

    Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 119–132 : Auteur(s): Everson, I. and K.-H. Kock

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