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1. Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects

   CCAMLR areas is to model the haul-by-haul ratios of catch to effort as the response variable in a ... . Tweedie distribution) for catch that, unlike lognormal or gamma distributions, admits zero values. In ... model (GLMM), in order to provide more efficient estimates of the standardised CPUE time series and more ... as a result of the imbalance in the number of hauls in the year-by-vessel cross-classification ... in a generalised linear model (GLM) with a square-root link function and a unit variance function. A ... values. In addition, random vessel effects are introduced into the GLM, as specifi ed by a generalised ... linear mixed model (GLMM), in order to provide more effi cient estimates of the standardised CPUE time ... -vessel information as a result of the imbalance in the number of hauls in the year-by-vessel cross ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Author(s): Candy, S.G

2. Spatial distribution of management measures, Antarctic krill catch and Southern Ocean bioregions: implications for conservation planning

   between habitat (bioregion), existing spatial management and Antarctic krill catch in the Southern Ocean ... important differences between pelagic bioregions in terms of the fraction that was open to fishing, and the ... has ever been fished, and this fishing is concentrated in three of the seven bioregions found in the ... be used to prioritise protection for bioregions that are currently under-represented in marine ... CCAMLR has endorsed the development of a representative system of marine protected areas (MPAs) in the ... scales that are appropriate in terms of both conservation benefits and rational use. A conservation ... measure (CM) agreed by the Commission in 2011 (CM 91-04) sets out a general framework for establishing ... their viability and integrity in the long term...’ (CCAMLR, 2011). There are many approaches to the ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 1–19 : Author(s): Grant, S.M., S.L. Hill and P.T. Fretwell

3. Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia

   (Champsocephalus gunnari) in Subarea 48.3 employs the CCAMLR mixture analysis program (CMIX) and generalised yield ... accurate identification of age cohorts from the survey data. In this paper a length-based approach is ... data which, in conjunction with the bootstrapped survey biomass data, yields an estimate of the ... showed very good agreement in calculated yields for 2006, 2007 and 2009, and some differences for 2008 ... mackerel icefish (Champsocephalus gunnari) in Subarea 48.3 employs the CCAMLR mixture analysis program ... (TAC). One issue is the accurate identification of age cohorts from the survey data. In this paper a ... population from the survey data which, in conjunction with the bootstrapped survey biomass data, yields an ... /GYM methodology showed very good agreement in calculated yields for 2006, 2007 and 2009, and some ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Author(s): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew

4. Management and uncertainty: the example of South Georgia

   :  Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... to consider ways in which CCAMLR can improve its ability to take decisions in the face of uncertainty ... uncertainty. The question is addressed specifically in terms of the fishery of Notothenia rossii around South ... often made with some degree of uncertainty in scientific advice. Such uncertainty is unlikely to be ... avoided even though further research should reduce its degree. It seems useful to consider ways in ... which CCAMLR can improve its ability to take decisions in the face of uncertainty. From an ... with uncertainty. The question is addressed specifically in terms of the fishery of Notothenia ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Author(s): Gulland, J.A.

5. Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program

   correlated (>0.6). Criteria for inclusion of parameters in the indices are discussed when parameters are ... statistical procedure adopted by WG-EMM in 1996 for identifying anomalies in CEMP parameters. The power of the ... appeared in the data. An alternative procedure, using estimates of the mean and variance of baseline time ... in CCAMLR. File:  06delamare-constable.pdf ... correlated (>0.6). Criteria for inclusion of parameters in the indices are discussed when parameters are ... statistical procedure adopted by WG-EMM in 1996 for identifying anomalies in CEMP parameters. The power of ... values have appeared in the data. An alternative procedure, using estimates of the mean and variance of ... for application in CCAMLR. Description d'une methode susceptible de combiner les donnees collectees ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 101–117 : Author(s): de la Mare, W.K. and A.J. Constable

6. Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements

   tonnes- at the low end of values that have been suggested in the past. The differences between our ... . Additionally, the current precautionary catch limits in the South Atlantic are set using a superseded acoustic ... survey of the South Atlantic in January 2000 may result in an effective biomass which is greater than the ... value used in the past. The seasonal and local consequences of large catch limits will have to be taken ... that have been suggested in the past. The differences between our estimates and others can be ... precautionary catch limits in the South Atlantic are set using a superseded acoustic target strength which has ... effectively underestimated the krill biomass by a factor of three, so the new survey of the South Atlantic in ... January 2000 may result in an effective biomass which is greater than the value used in the past. The ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Author(s): Nicol, S., A.J. Constable and T. Pauly

7. Analysis of albatross and petrel distribution within the CCAMLR Convention Area: results from the Global Procellariiform Tracking Database

   successful measures to reduce the incidental mortality of seabirds in most of the fisheries within its ... and petrels in the CCAMLR Convention Area to inform the CCAMLR risk-assessment process. Albatross and ... petrel distribution is analysed in terms of its division into FAO areas, subareas, divisions and ... including areas managed by CCSBT, ICCAT, IOTC and WCPFC. Priority gaps in current tracking data are ... the incidental mortality of seabirds in most of the fisheries within its jurisdiction, and has done ... ) fishing. This paper presents an analysis of the distribution of albatrosses and petrels in the CCAMLR ... in terms of its division into FAO areas, subareas, divisions and subdivisions, based on remote ... CCSBT, ICCAT, IOTC and WCPFC. Priority gaps in current tracking data are identified, especially ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 143–174 : Author(s): BirdLife International (prepared by C. Small and F. Taylor)

8. Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground

   usIng catch-at-agE and agEd mark-rEcaPturE data from thE maIn trawl ground S.G. Candy, D.C ... in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI, Division 58.5.2 ... to 2008. A large proportion of the recaptures of fish released in this fishery were aged and these ... in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... of M have been studied using simulation. In application to the data obtained for the HIMI main trawl ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins

9. Krill population biology during the 1991 Chilean Antarctic krill fishery

   r. Bcero 6bIJlO BbInOJlHeHO 419 TpaJleHl-lti. Onpe,lleJlI-IJlI-ICb Cpe,llHl-lti BbIJlOB 3a tIac 1-1 Cpe ... / Description:  Population biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 ... 419 hauls. In Area A, a unimodal size frequency distribution was found; the size range was between 30 ... spermatophore had a 36.5 mm TL, 80% of the females with spermatophores had a TL larger than 45 mm. In Area B, a ... in night-time catches while females are more abundant during daytime catches, thus showing a ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Author(s): Mujica R., A., E. Acuña S. and A. Rivera O.

10. CCAMLR ecosystem monitoring and a feedback management procedure for krill

    -term declines in land-based predator performance (e.g., reproductive performance) that may be ... attributable to loss of prey through fishing activities. The principal fishery in the CCAMLR Convention Area is ... the krill fishery and this paper examines ways in which the information being obtained from the ... Program has been developing a technique which might detect short-term declines in land-based predator ... activities. The principal fishery in the CCAMLR Convention Area is the krill fishery and this paper examines ... ways in which the information being obtained from the Ecosystem Monitoring Program might be ... discussions (see Nicol, 1991 for review) and resulted in the establishment of a Precautionary Catch Limit of ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Author(s): Constable, A.J.

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