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Commission pour la conservation de la faune et la flore marines de l'Antarctique

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  1. Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates

    Paper Title:  Quantifying vessel performance in the CCAMLR tagging program: spatially and ... tagging program is critical to the successful management of a number of toothfish fisheries in Antarctica ... . In particular, tag-detection rates are directly linked to stock size estimated from the tag data in ... an integrated stock assessment. Previous attempts to assess the relative reliability of vessels in ... calculation by using CCAMLR Science, Vol. 20 (2013): 73–80 73 QuantIfyIng vessel performance In the ccamlr ... between sea- sons. Note that the fishing season in Subareas 88.1 and 88.2 starts on 1 December each year ... vessel in three-year blocks. The area of each circle is proportional to the number of fish scanned by ... , and ends when the quota has been fully caught which, in recent years, has been between 15 January ...

    Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Auteur(s): Mormede, S. and A. Dunn

  2. An assessment of CCAMLR measures employed to mitigate seabird mortality in longlining operations for Dissostichus eleginoides around South Georgia

    Paper Title:  An assessment of CCAMLR measures employed to mitigate seabird mortality in ... longliner, the BF Cisne Verde, fishing in CCAMLR Subarea 48.3 during the 1996/97 season. In this study 61 ... lines were laid from March to May 1997 using the Spanish double-line method. In accordance with CCAMLR ... streamer line in mitigating incidental mortality of seabirds during night-time setting. Data were recorded ... CCAMLR Scheme of International Scientific Observation (Ashford et al., 1994). In the following year ... Kerguelen (Capdeville, 1996). The high rate found by Ashford et al. (1995) in 1994 was during a year ... higher in 1997, the year of this study, which may indicate that birds had other food sources available ... CCAMLR MEASURES EMPLOYED TO MITIGATE SEABIRD MORTALITY IN LONGLINING OPERATIONS FOR DlSSOSTlCHUS ...

    Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 217–230 : Auteur(s): Ashford, J.R. and J.P. Croxall

  3. Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993

    Paper Title:  Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description:  Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ... density over the 13-year period were 1 703 x  103 tonnes and 53.2 g/ 2. File:  01hewitt-demer.pdf ... years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... the effects of variations in year class strength. In six out of seven cases the change in density ... BIOMASS IN THE ELEPHANT ISLAND AREA: 1981 - 1993 R.P. Hewitt Southwest Fisheries Science Center La ... 92093, USA (Supported by the Hertz Foundation) Abstract Acoustic estimates of krill biomass in the ... /m2. Average biomass and average density over the 13-year period were 1 703 X 103 tonnes and 53.2 g ...

    Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Auteur(s): Hewitt, R.P. and D.A. Demer

  4. A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3

    Champsocephalus gunnari in Subarea 48.3 Abstract / Description:  A method of determining the rate of natural ... been correctly chosen. Data for Champsocephalus gunnari in Subarea 48.3 are used to show that the ... described method is sound. When a mistake is made in the choice of natural mortality coefficient, the ... estimate of the intercept of the regression is other than zero. A bias in the intercept will be positive if ... group in the first fishing year is estimated from equation (8); (ii) the abundance values Na,l, a ... fishing year, and fish mean weight are given in Tables 1 and 2. The catch by weight of C. gunnari in ... the value of 0.35 used by the Working Group on Fish Stock Assessment (WG-FSA) in previous years. In ... DERIVING NATURAL MORTALITY RATE USING DATA FOR CHAMPSOCEPHALUS GUNNARI IN SUB AREA 48.3 P.S. Gasyukov ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Auteur(s): Gasyukov, P.S. and R.S. Dorovskikh

  5. Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48

    Paper Title:  Alternative methods for determining subarea or local area catch limits for krill in ... precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies an ... application in future of precautionary limits to subareas or local areas of this area. Nine alternative ... current fishing patterns; and (vi) the potential for delay in implementing the alternative. An alternative ... Penguins in the South Shetland Islands, Antarctica. British Antarctic Survey Bulletin, 81: 19-30. 247 ... single year. Then, for the following two years, that subarea would be closed to fishing. For example, if ... SUBAREA OR LOCAL AREA CATCH LIMITS FOR KRILL IN STATISTICAL AREA 48 G. Watters and R.P. Hewitt ... (Euphausia superba) in Statistical Area 48. The measure also implies an application in future of ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Auteur(s): Watters, G. and R.P. Hewitt

  6. Catch per unit effort and proportional recruitment indices from Japanese krill fishery data in Subarea 48.1

    fishery data in Subarea 48.1 Abstract / Description:  Proportional recruitment indices and CPUE in Subarea ... . CPUE (catch/towing volume) in the Livingston Island area showed a decreasing trend during the study ... period. The use of different fishing strategies in response to a demand for higher product quality and a ... general decrease in krill density in the study area were considered as possible reasons for this. On the ... . They showed peaks around the 1980/81, 1981/82 and 1985/86 year classes, and low values in between ... testing Log1,CPUE versus year in both areas. The results of the test showed a significant negative trend ... results, discrepancies in proportional recruitment from two year classes were observed between our study ... and Siegel et al. (1997). In the case of the 1991/92 year class, our calculation resulted in higher ...

    Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 47–63 : Auteur(s): Kawaguchi, S., T. Ichii and M. Naganobu

  7. Cephalopod research in the Antarctic

    Paper Title:  Cephalopod research in the Antarctic Abstract / Description:  Cephalopods are a ... policy for management of Antarctic cephalopods. In view of the rapidity that cephalopod fisheries can ... data in turn may be useful, in the future, for predicting year class strength of exploited species ... successfully raised in rabbits and testing is being carried out for cross reactions with other pelagic ... - 323 - CEPHALOPOD RESEARCH IN THE ANTARCTIC P.G ... cephalopods. In view of the rapidity that cephalopod fisheries can develop there is need for co-ordinated ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 323-334 : Auteur(s): Rodhouse, P.G.

  8. Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)

    Paper Title:  Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR ... conducted from September to October 2006 in the northern part of the Kerguelen Plateau (CCAMLR Statistical ... Division 58.5.1). The swept-area method was used in the depth range from 100 to 1 000 m with 207 random ... , their biomass during the period between the two surveys. In addition to the commercial species ... from 6 September to 9 October 2006 (with two stations on 19 and 20 October 2006) in the whole area of ... 10.21 0 10 000 20 000 30 000 40 000 50 000 To nn es TOP ANI NOS NOR BEA BYR MCC LIC Species ... - nile fish (<30 cm) (Appendix 6) are present in the samples. The study of the size and related ... - cies in the Kerguelen area is known. The geographic and bathymetric fish distribu- tions over a 20 ...

    Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Auteur(s): Duhamel, G. and M. Hautecoeur

  9. Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen Islands areas

    Paper Title:  Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen ... rebuilding of the depleted stocks and improvement in yields. It is desirable that such measures be based on ... average, with the past observations. The simulations may prove useful in comparing observed performance of ... about 4 times the initial yield at the end of the 20-year simulation, doubling in four years for both ... . Average of the Ten 20-Year Projections for Stock Size in Numbers (X 10- 6 ) and Weight (X 10-3 ) Stock ... 2003 AVE - 255 - Average of the Ten 20-Year Projections for Stock Size in Numbers (x 10-6) and ... F = 0.36, the stock almost doubles in five years and increases slowly but continuously over the 20 ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 229-298 : Auteur(s): Hennemuth, R.C., K.D. Bisack and G. Duhamel

  10. The use of analysis of penguin stomach contents in simultaneous study of prey and predator parameters

    Paper Title:  The use of analysis of penguin stomach contents in simultaneous study of prey and ... found in the stomach of a given penguin prevents the pooling of krill lengths from different samples ... . Samples taken in Bahía Esperanza were used to illustrate the different approaches to this analysis. A ... -.. "'" .' .'"."."." " ....... "--.... '" .. " .. " ............ " . --. " .. ""." .......... " ... "." ..... " .... -.. " .. --." .. --............... ' ... " ---......... " ............. " ..... -.. " .. ,,' ...... . .._ ...... o IL-______________ L-______________ ~ ______________ J-______________ ~ o 10 20 30 40 dec 13 ... studies, all krill taken from stomachs of a particular group of penguins were pooled together in order to ... CONTENTS IN SIMULTANEOUS STUDY OF PREY AND PREDATOR PARAMETERS E. Marschoff and B. Gonzalez Abstract ... for analysis because lack of independence between krill specimens found in the stomach of a given ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 367–375 : Auteur(s): Marschoff, E. and B. González

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E-mail: ccamlr [at] ccamlr [dot] org
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Adresse: 181 Macquarie Street, Hobart, 7000, Tasmania, Australia

 

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