Résultats de la recherche

1. Use of indices of predator status and performance in CCAMLR fishery management

   seabird and seal predators,collected as part of the CCAMLR Ecosystem Monitoring Program (CEMP) could be ... used in the management, by CCAMLR, of commercial fisheries. It reviews reasons why it is important for ... CCAMLR formally to use such data in its fishery management operations and discusses the constraints ... inherent in the CEMP data, both from predator monitoring and harvesting perspectives. An outline of a ... picture at the species and site level. A more formal approach would be to assign levels of significance ... restriction and adopt more severe ones if there are no signs of a change for the better. 3.4 General If ... Handbook No. 19. Monitoring Studies of Seabirds. p. 13. CCAMLR. 1985. Report of the Fourth Meeting of the ... within species, sites and areas and reviewing factors potentially influencing or correlated with the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 353–365 : Auteur(s): Croxall, J.P.

2. Modelling variability and estimating power to detect change in Adélie penguin fledgling weights

   year, but there was no evidence that the rate of decline differed between years. A consequence of this ... weight data were used to examine the power to detect a change in fledgling weights after an impact. The ... period corresponding to the average peak fledging period. Modelling assumes that fledgling weights are ... or decrease after an impact. Fledgling weight was found to decline through the fledging period each ... . Fledgling weight was found to decline through the fledging period each year, but there was no evidence that ... were excluded from the analysis because they provided no information about the rate of change in ... . Initial fitting of data to this model indicated there was no evidence that the rate of change in weight ... post-impact periods, in respect of the null hypothesis of no change after impact, i.e. H0: δ = 0 ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 191–200 : Auteur(s): Emmerson, L.M., C. Southwell and J. Clarke

3. Using ecosystem monitoring data to detect impacts

   using monitoring data with no control sites. These methods assess either (i) the expected probability of ... Paper Title:  Using ecosystem monitoring data to detect impacts Abstract / Description:  The ... purpose of ecosystem monitoring programs is to indicate the state of ecosystems and whether they have been ... an observed value in an unimpacted system, or (ii) the frequency of values below a fixed reference ... ). There is no evidence of a fishery-induced impact on these data during the monitoring period. However ... - ity is below an arbitrary critical probability, Pcrit, the hypothesis that no impact has occurred is ... relative to these reference points. No infer- ence criterion will be completely reliable, and so the ... sites. These methods assess either (i) the expected probability of an observed value in an unimpacted ...

   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

4. Southern elephant seals and CCAMLR

   research findings of primarily South African (including some French and Australian results) studies on the ... southern elephant seal (Mirounga leonina) in the Kerguelen province of the Southern Ocean. Sub-populations ... studies during the animals’ terrestrial phase have failed to explain this observed decline which has also ... been recently confirmed for the Macquarie Island stock. The availability of food, competition with ... Georgia it feeds largely on krill. On the other hand, whereas no commercial exploitation of fish takes ... concentration on the breeding and moulting sites in summer were assumed in the past but the recorded annual ... primarily South African (including some French and Australian results) studies on the southern elephant ... seal (Mirounga leonina) in the Kerguelen province of the Southern Ocean. Sub-populations of this ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Auteur(s): Bester, M.N. and D.G.M. Miller

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

   density measurements Abstract / Description:  The total circumpolar abundance of Antarctic krill ... historical information on the overall range of krill. The biomass estimates fall between 60 and 155 million ... tonnes- at the low end of values that have been suggested in the past. The differences between our ... estimates and others can be explained by a number of factors such as: an underestimation of the range or the ... with them coefficients of variation, however there is no consistency in their presentation in the ... which there are no recent, reliable, standardised krill biomass estimates, viz. Subarea 48.6 (the ... has been confirmed by information from the fishery (Ichii, 1990). There have been no reports of ... errors in the acoustic methodology itself or through inappropriate survey design. There is no direct ...

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

6. Movement and growth of tagged Dissostichus eleginoides around South Georgia and Shag Rocks (Subarea 48.3)

   and there have been no reported recaptures of these fish tagged at South Georgia or elsewhere in the ... Rocks (Subarea 48.3) Abstract / Description:  In 2000 the UK started a Patagonian toothfish ... (Dissostichus eleginoides) tagging program to investigate the spatial and temporal movement of fish and to ... strontium chloride or oxytetracycline that places a permanent chemical marker on the otolith indicating the ... the longline fi shery and there have been no reported recaptures of these fi sh tagged at South ... prospecciones de peces demersales no sean lo sufi cientemente grandes como para ser capturados por la pesquería ... there have been no recaptured tags where the fi sh was chemically marked as these were generally of ... movements were consistent with the direction of the Brazil Current although no observers were present to ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 101–111 : Auteur(s): Marlow, T.R., D.J. Agnew, M.G. Purves and I. Everson

7. Investigations of required sampling regimes for environmental parameters

   / Description:  The sensitivity of different sampling regimes in identifying inter-annual changes in ... Type I error (rejecting the null hypothesis when there is no effect) and ~, the probability of making ... . If parameters do show diurnal variation, the effective sample rate can be no more than one per day ... principles of the effect of daily and depressional cycles may hold for other sites, analyses similar to this ... REGIMES FOR ENVIRONMENTAL PARAMETERS D.J. Agnew* Abstract The sensitivity of different sampling ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Auteur(s): Agnew, D.J.

8. Data on krill (Euphausia superba Dana) consumption by coastal fishes in Division 58.4.2 (Kosmonavtov and Sodruzhestva Seas)

   58.4.2 (Kosmonavtov and Sodruzhestva Seas) Abstract / Description:  Current estimates of the level of ... krill consumption (Euphausia superba) are based on data obtained from the Atlantic sector which have ... then been extrapolated over all of Antarctica. According to these calculations the entire amount of ... krill consumption have thus far only been carried out for the Scotia and Lazarev Seas (Kock, 1985 ... stocks in Prydz Bay have varied over the years from 17.5 to 85 x 103 tonnes. Seasonal consumption of ... could be the primary consumers of E. superba. It is entirely possible that in Prydz Bay (Sodruzhestva ... structure of the Antarctic krill (Euphasia superba Dana) in the Prydz Bay region, Antarctica. Polar BioI ... , V.A. Bibik and V.V. Gerasimchuk* Abstract * Current estimates of the level of krill consumption ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 305–319 : Auteur(s): Pakhomov, Y.A., V.A. Bibik and V.V. Gerasimchuk

9. CCAMLR ecosystem monitoring and management: future work

   :  Harvesting of marine living resources in the Southern Ocean is managed by the Commission for the Conservation ... managing fisheries with the maintenance of ecological relationships included in the conservation objectives ... . In the late 1980s, CCAMLR’s precautionary approach was developed, incorporating principles of how to ... use scientific evidence in the decision-making process. Even though this approach was based on the ... the local population due to a high degree of site fi delity from one year to the next. For more ... will be no capacity to understand the relative effects of fi shing and the environment. This ... . If no areas or predators are to be disproportionately affected by fi shing once the fi shery is ... median spawning stock biomass, but no fi eld estimation of this is necessary for the decision rule to ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Auteur(s): Constable, A.J

10. Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles

    . Thomas (Western Shore of Admiralty Bay, King George Island, Antarctica, Subarea 48.1). The impacts of ... observation periods were compared. No differences were found between the control group and overflights by ... nesting birds. No increase in aggressive behaviour was observed during the overflights by either electric ... Abstract / Description:  The importance of unmanned aerial vehicles (UAVs) in remote sensing is rapidly ... nests in the colony, and collecting biological samples. ASPA No. 128 is a site of long-term moni ... Admiralty Bay, King George Island, Antarctica, Subarea 48.1). The impacts of electric and piston engine ... there is only limited information on the subject with almost no dedicated research to address it ... Bay (King George Island) and also to collect data enabling the formula- tion of preliminary ...

    Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Auteur(s): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój

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