Résultats de la recherche

1. Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations

   include krill in food-web models and to guide modellers to key sources of data. It describes the strengths ... fishery (sustained sampling in one place and wide area and time coverage) and via predators (long time ... . Temporally, the intense (order of magnitude) interannual variability in krill population size within the ... . Growth in spring, summer and autumn is now fairly well quantified, but mortality remains an enigma. We ... ) method has been in use for 20 years but there have been various attempts to use other analytical ... Krill in ice-covered habitats year round: small habitat volume but often very high krill ... occurred year- round throughout Antarctica, and regularly with an estimated ~20% of the stock deeper than ... and the seabed. Schmidt et al. (2011) included this habitat in the abovementioned 20% calculation ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Auteur(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)

2. The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)

   of the development of a management regime for them. Finally it aims to highlight areas in which ... further research should be directed in order to provide information on which to base the most appropriate ... assessment and management methods in light of continuing interest in the regional crab fishery. Considerable ... gaps in our knowledge of the biology, ecology and demography of the lithodid species at South Georgia ... storage. Moulting (and therefore mating) in P. spinosissima has been observed year-round but may be ... . Very small P. spinosissima (~ 20 mm CL) have occasionally been caught in demersal survey trawls on ... then raised by the total fishable area in Subarea 48.3 between 200 and 1 000 m depth (SC-CAMLR, 1992 ... . Lovrich, S. Thatje, U. Nettelmann and K. Anger. 2005. First year growth in the lithodids Lithodes ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 1–15 : Auteur(s): Belchier, M., T. Peatman and J. Brown

3. Histological study on the ovarian development of mackerel icefish (Champsocephalus gunnari) from the South Georgia Islands

   individuals (45%) was found, together with a relatively low occurrence of females that spawned or were in ... on ovarian development in Champsocephalus gunnari caught by the RV Dr Eduardo L. Holmberg in the ... South Georgia and Shag Rocks areas in February and March 1994. Six phases of oocyte development were ... to a regression stage. In some cases these ovaries presented few atretic oocytes; in others a ... the periphery, in contact with the oolema. The zona radiata increases in thickness (20 pm), showing ... the specimens ranged from two to five years, estimated from the age/length key presented in Barrera ... histological analysis was carried out on ovarian development in Charnpsocephalus gunnari caught by the RV Dr ... Eduardo L. Holrnberg in the South Georgia and Shag Rocks areas in February and March 1994. Six phases of ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 35–49 : Auteur(s): Macchi, G.J. and E.R. Barrera-Oro

4. Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?

   index of a morphometric characteristic? Abstract / Description:  In sexually dimorphic species ... avoiding the necessity of sex determination. However, uncertainty in sex ratios can lead to considerable ... Type I and Type II errors. Lack of knowledge about the sex ratio between years makes combining the data ... equal variance and equal numbers of males and females in the sample. The first condition was met in ... varying success. Values of c and d in equation (1) together with the sample size required to be 80 ... * Abstract In sexually dimorphic species, morphometric characteristics have separate distributions for ... determination. However, uncertainty in sex ratios can lead to considerable Type I and Type II errors. Lack of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Auteur(s): Agnew, D.J.

5. Telemetry monitoring of ecological resources

   system developed at the University of Minnesota in the mid-1960s 20 • It used two mechanically rotating ... Nimbus system. However, animal tracking using satellites began in earnest with the Argos system. The ... implanted radio transmitters in ducks. J. Wildl. Manage. 48(3) : 982-987 19. Garshelis, ibib. 20 ... commercial transistor in the late 1950s, the application of electronics to the monitoring of biological ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 495-511 : Auteur(s): Kuechle, V.B.

6. 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 ... . 2002. Rigor and Representativeness in Marine Protected Area Design. Coastal Man- agement, 30 (3): 237 ... with similar distributions across the Convention Area. 0 5 10 15 20 25 30 35 0 2 4 6 8 10 12 ... (2003) noted that during the years of highest recorded fishing activity, the Soviet fleet operated in ... biore- gion defined on the basis of long-term (up to 30 years) averages of time series (Grant et al ...

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

7. 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

   in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... obtained using proportions-at-length and fishery- and year-specific age–length keys (ALKs) for years 1998 ... 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 ... Poisson. 0 10 20 30 40 50 0 50 10 0 15 0 Bin Mean Expected Recaptures B in R es id ua l V ar ia ... (Ground B). In this study the ALKs used to obtain total catch-at-age numbers were year and fishery ... season 3 (late-season: 1 October–30 November) as given in Candy and Welsford (2009). The legal HIMI ... . recapture) year in f2. Numbers of releases by length bin for fishery f2, given the above restrictions ...

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

8. Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish

   250-500 m depth intervals. The updated estimates are about 1 424 (20%) n miles larger in area within ... examined, the point estimate of total biomass increased from 5 to 30% for eight species and decreased by 20 ... the 50-500 m isobaths than Everson's estimates, though changes in area are specific to the depth ... interval. There is a corresponding change in estimated biomass within strata when these areas are ... PaCCMOTPeHHbIX BNAOB OqeHKa o6qet ~ H O M ~ C C ~ I BO3pOCna Ha 5-30% AJIR 8 BHAOB M COKpaTHJIOCb Ha 20% AnR ... total aumento entre 5 a 30% para ocho de las nueve especies de peces examinadas, y disminuy6 en 20 ... 20% overall higher estimate of seabed area in this study due to a more extensive computed seabed ... strongly influenced by changes in seabed area of strata (-37%, 23% and 30% respectively; Table 3 ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 197–204 : Auteur(s): C.D. Jones

9. 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 ... alter conservation measures based on options in Article IX of the CCAMLR Convention and dictated by the ... sufficient time to ensure that the objectives set out in Article IT of the CCAMLR Convention are not ... , Article IT can be translated, in the case of the predators, to ask the general question "Will fishing for ... relationships as described in Article 11. As a result, the goals in predator protection for the kriU fishery ...

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

10. An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data

    (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data Abstract / Description:  In 2006, the ... biological data submitted by scientific observers on board vessels in the fishery. Results of a Leslie ... of toothfish at the scale of individual fishing grounds in the 2004/05 and 2005/06 seasons. This ... inconsistencies are noted between historical data and those submitted in the 2006/07 season, with Patagonian ... in 2003/04, 49 (2.4%) were excluded from analysis due to missing data. Of these, 20 events had no ... mean weight for this species is almost uni- formly below 20 kg across all seasons and grounds. In ... comparison, median mean weight for D. mawsoni is typically greater than 20 kg. Dissostichus mawsoni in ... in each season were between 30 and 40 km, giving an indication of the relative size of the ground ...

    Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Auteur(s): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara

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