Résultats de la recherche

1. Seabird mortality in the Patagonian toothfish longline fishery around Crozet and Kerguelen Islands, 2001–2003

   eleginoides) longline fishery operating in the French Exclusive Economic Zones (EEZs) of Crozet and Kerguelen ... caught over this period. A multivariate analysis suggests that a combination of factors (environmental ... and relating to fishing techniques) have an effect on the observed numbers of seabirds caught ... incidentally. The results of this study suggest that a significant part of the mortality of white-chinned ... (Dissostichus eleginoides) longline fi shery operating in the French Exclusive Economic Zones (EEZs) of Crozet ... caught over this period. A multivariate analysis suggests that a combination of factors (environmental ... and relating to fi shing techniques) have an effect on the observed numbers of seabirds caught ... incidentally. The results of this study suggest that a signifi cant part of the mortality of white-chinned ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 53–80 : Auteur(s): Delord, K., N. Gasco, H. Weimerskirch, C. Barbraud and T. Micol

2. A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

   ) resource in the Prince Edward Islands vicinity Abstract / Description:  The status of the toothfish ... future TACs in the face of this appreciable uncertainty. Four Operating Models (OMs) reflecting ... developed which take account of the different selectivities of past longline and pot fisheries. These OMs ... are used for trials of a candidate generic MP which could provide future TAC recommendations for this ... . Pap., 242: 47 pp. Brandão, A. and D.S. Butterworth. 2003. Progress on the application of an Age ... earlier version of this paper. References Agnew, D.J., R. Hillary, M. Belchier, J. Clark, and J ... ) Department of Mathematics and Applied Mathematics University of Cape Town Rondebosch 7701, South Africa ... Email – anabela.brandao@uct.ac.za Abstract The status of the toothfish resource in the Prince Edward ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Auteur(s): Brandão, A. and D.S. Butterworth

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

   using a von Bertalanffy (VB) growth model taking into account response-biased sampling of fish that were ... aged. Subsampling of random lengthfrequency (LF) data used to obtain the samples of fish for ageing ... used length-bin sampling involving a fixed sample size per bin. Estimation of the VB parameters used a ... definition of the likelihood function based on variable probability (VP) sampling due to the prespecified ... . Lamb and R. Williams Department of Environment and Water Resources Australian Antarctic Division 203 ... fi tted using a von Bertalanffy (VB) growth model taking into account response-biased sampling of fi ... sh that were aged. Subsampling of random length- frequency (LF) data used to obtain the samples of fi ... sh for ageing used length-bin sampling involving a fi xed sample size per bin. Estimation of the VB ...

   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. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL

   Division 58.5.2), using CASAL and data consisting of multi-year random stratified trawl survey (RSTS ... representative of the main plateau, where juvenile fish are found, but are of relatively low intensity in effort ... , consisting of three main grounds. The model implemented in CASAL is a simple, single-sex, single-area ... functions for each ground by gear (trawl and longline) combination. Various combinations of dataset ... . In particular, this paper incorporates refinements to previous assessments of this stock to resolve ... mcdonAld ISlAndS uSIng cASAl S.G. Candy and A.J. Constable Department of the Environment, Water ... CASAL and data consisting of multi-year random stratified trawl survey (RSTS) abundance estimates by ... releases and recoveries by length bin, is described. The annual surveys are spatially representative of ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Auteur(s): Candy, S.G and A.J. Constable

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

   Ross Sea Abstract / Description:  Target strength (TS) of preserved (frozen and defrosted) Antarctic ... silverfish (Pleuragramma antarcticum) of total length (TL) from 110 to 202.5 mm were measured ex situ (Ancona ... -larvae of P. antarcticum with a total length from 13 to 70 mm, were conducted in the southeast of the ... continental slope and shelf of the Ross Sea at depths from 30 to 120 m, during the Italian expeditions of 1997 ... experiments. The aim of this paper is to determine TS of P. antarcticum at 38, 120 and 200 kHz using in ... ______________________________________________________________________ 1 In order to simplify the presentation of the paper, please refer to the appendix for all ... paper is: s = 10 (hard knee). For (krb) → ∞ and (krb) → 0 the asymptotic for- mulas of the acoustic ... . Bottaro and M. Vacchi ISPRA Università di Genova Genova, Italy Abstract Target strength (TS) of ...

   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

6. A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels

   from Antarctic krill fishing vessels Abstract / Description:  The use of fishing-vessel-based acoustic ... data has been recognised as an important way to estimate the distribution and relative abundance of ... Antarctic krill (Euphausia superba), yet the quality and even the utility of the data may be seriously ... degraded by interference noise due to the lack of synchronisation of the acoustic instruments found on some ... part of this activity, this paper presents a post-processing method to remove significant ... data collected from Antarctic krill fishing vessels X. Wang Ocean University of China Qingdao ... 266100 People’s Republic of China and Key Laboratory for Sustainable Development of Marine Fisheries ... Ministry of Agriculture Yellow Sea Fisheries Research institute Chinese Academy of Fishery Sciences ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Auteur(s): Wang, X., J. Zhang and X. Zhao

7. Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study

   animal count data to a common reference point of breeding chronology for species with a complex temporal ... function of sampling availability. ICESCAPE (Integrating Count Effort by Seasonally Correcting Animal ... Population Estimates) is a suite of routines that implements a general abundance estimator accounting for ... reported measures of uncertainty associated with originally published counts are propagated through to the ... paper modelling availability curves (Southwell et al., 2010). Raw counts of adults, chicks or nests ... remainder of this paper the bootstrap procedure, and methods associated with summa- rising the bootstrap ... , C. Southwell and R. Trebilco* Australian Antarctic Division Department of Environment, Water ... animal count data to a common reference point of breeding chronology for species with a complex temporal ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Auteur(s): McKinlay, J., C. Southwell and R. Trebilco

8. Estimating optimal observer coverage in the Antarctic krill fishery

   / Description:  Data collected as part of the CCAMLR Scheme of International Scientific Observation from ... estimate parameters of interest, in this case the mean (or median) krill length and the rate of larval fish ... : 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 ... an earlier version of this paper (Agnew et al., 2009). The target rate of >20% of haul coverage ... – d.agnew@mrag.co.uk 2 Statistical Services Centre University of Reading Reading RG6 6FN United Kingdom ... Abstract Data collected as part of the CCAMLR Scheme of International Scientific Observation from ... reliably estimate parameters of interest, in this case the mean (or median) krill length and the rate of ...

   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

9. Using ecosystem monitoring data to detect impacts

   impacted by activities such as fishing. This paper discusses a range of methods for inferring such impacts ... purpose of ecosystem monitoring programs is to indicate the state of ecosystems and whether they have been ... using monitoring data with no control sites. These methods assess either (i) the expected probability of ... an observed value in an unimpacted system, or (ii) the frequency of values below a fixed reference ... paper discusses a range of methods for inferring such impacts using monitoring data with no control ... population health which is a legitimate focus for conservation objectives. This paper discusses ways of ... detect an impact. This paper introduces inference approaches and evaluates the probability of Type I ... paper presents several methods for infer- ring an impact using time series of observations without ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Auteur(s): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda

10. Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01

    acoustic surveys of Antarctic krill (Euphausia superba) were conducted around South Georgia in the 2000/01 ... March 2001 (late-season). The surveys were the first in a newly planned five-year series of observations ... transects within a box to the northwest of South Georgia. The dedicated mid-season survey covered that box ... southwest of the island. Together these surveys provided temporally and spatially extensive coverage around ... of this paper, but suffi ce it to say that in the extended transect running 160 km offshore in the ... Laboratory, University of St Andrews, St Andrews, Fife, KY16 8LB, United Kingdom Email – andrew.brierley@st ... -andrews.ac.uk Abstract Three separate acoustic surveys of Antarctic krill (Euphausia superba) were conducted ... planned fi ve-year series of observations designed to complement and extend an existing time series ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Auteur(s): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst

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