Résultats de la recherche

1. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

   fluctuations together with preliminary information on adult survival and breeding success patterns for certain ... recruitment (from both individual growth and births, with a three-year time lag corresponding roughly to the ... duration, using equation (3). The distribution of NIK,, in year 200 then provides the stochastic analog ... variability, the figure actually used was the average of the medians over the last 50 years of the 200-year ... considering a krill dynamics model incorporating recruitment fluctuations together with preliminary ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Auteur(s): Butterworth, D.S. and R.B. Thomson

2. Preliminary model of krill fishery behaviour in Subarea 48.1

   restricted to the four months December to March, compares favourably with the historical distribution of ... Elephant Islands in alternate years would result in an average yearly catch similar to that at present ... during alternate years. File:  06agnew-marin.pdf ... compares well with the mean distribution of all catches in the study area over the years 1988 to 1992 as ... Livingston Island. Table 3: Distribution of catches predicted by the model with unrestricted fishing for ... restricted to the four months December to March, compares favourably with the historical distribution of ... concern that the krill fishery may compete for the krill resource with land-breeding predators (e.g ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Auteur(s): Agnew, D.J. and V.H. Marín

3. Assessment of krill flux factors in waters of South Orkney Islands during summer 1996

   study area  perimeter. Mean krill transport rate was 7.2 tonnes/hour/n mile with a standard deviation of ... a product of two variables integrated over the depth range 0 to 200 m: krill density (g/m 3) and ... water mass transport (m 3 /sec) per nautical mile of the study area boundary. Also given are the results ... tonnes/hour/n mile with a standard deviation of 15.5 tonnes/hour/n mile. Significant variability of ... the study area boundary. The first experiment to comply with this conceptual framework was carried ... 1996 krill flux in Subarea 48.2 was studied for the first time in full conformity with the guidelines ... the past. The size of the study area was chosen taking into account not only the need to comply with ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 195–204 : Auteur(s): Kasatkina, S.M., V.N. Shnar, M.I. Polischuk, A.M. Abramov and V.A. Sushin

4. Some principles for fisheries regulation from an ecosystem perspective

   and related species', that is; the a~imals with which man enters into competition for their food ... Convention applies shall be conducted in accordance with the provisions of this Convention and with the ... marine ecosystem and of the effects of environmental changes, with the aim of making possible the ... the organisms in a given area interacting with the physical environment so that a flow of energy ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Auteur(s): de la Mare, W.K.

5. Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996

   from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years of ... . However, we cannot exclude that with the arrival of a new fishing officer in the early 1990s changes in ... , with most of the commercial harvesting taking place in the first two years of the fishery. Results of ... and C. aceratus (Tables 3, 5 and 6). However, with the exception of C. aceratus, there is no ... Peninsula (Statistical Subarea 48.1) were exploited by trawling from 1978/79 to 1988/89, with most of the ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Auteur(s): Kock, K.-H

6. Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance index

   correlations with previously published interannual series of acoustic density estimates from scientific surveys ... cant correlations with previously published interannual series of acoustic density estimates from ... the krill supply to the factory, with the result that production is constant above this point. By ... ends in November, there was a fi shing season in the early 1980s when Japan started its operation in ... fi shing grounds matched reasonably well with the two survey boxes. Statistical methods Analysis ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 1–28 : Auteur(s): Kawaguchi, S., S. Candy, S. Nicol, K. Taki and M. Naganobu

7. Patterns and processes in the distribution and dynamics of Antarctic krill

   comparison with the Antarctic ecosystem, estimation of fractal dimensions of phytoplankton patches suggests ... fluorescence and temperature declines with increasing wavenumber (decreasing wavelength). The slope of the ... facilitate comparison with the power spectrum of Weber et al. (1986), we also analyzed the data by first ... . COMPARISON OF DATA WITH THE PHENOMENOLOGICAL MODEL PREDICTIONS OF MANGEL As an example of how we intend to ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 281–299 : Auteur(s): Levin, S.A., A. Morin and T.M. Powell

8. 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

   assuming normal errors with constant coefficient of variation using iteratively weighted least squares ... using VP maximum likelihood (MLP) with length-bin relative probabilities defined using fishing ... , the mean trend in observed AGR values with release length compared with those obtained using IWLS ... -estimated parameters. A young-age adjustment (less than 5 years old) to the VB model is also given in order ... parameters. If there is an early-age (i.e. below age 5) phase of growth which is different from a later-age ... (equation 3) went some way towards rectifying this problem (see Figure 4b) with a predicted mean length-at ... , ignoring VP sampling and assuming normal errors with constant coeffi cient of variation using iteratively ... the VB curve fi tted using VP maximum likelihood (MLP) with length-bin relative probabilities defi ...

   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

9. Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   characteristics of these data and limitations, such as cloud cover and high solar zenith angle, are discussed with ... biogeochemical models for the Southern Ocean is presented, with a focus on those models that have been validated ... oceanic reservoir. The Southern Ocean (here mostly defined as south of 50°S) is a vast province with ... and limitations, such as cloud cover and high solar zenith angle, are discussed with regard to their ... biogeochemical models for the Southern Ocean is presented, with a focus on those models that have been validated ... calculate primary productivity, usually in units of mmolC m–2 or mgC m–2 per unit time (day or year). In ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Auteur(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear

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

    using microscopes (microscopical scale) was elaborated and adapted to correspond with the macroscopic ... (i.e., unaided visual observation) scale commonly used. The first five stages correspond with those ... individuals (45%) was found, together with a relatively low occurrence of females that spawned or were in ... development stages are described in Table 3. Oocytes in early secondary vitellogenesis (Table 3, stage 4 ... smaller-sized immature fish (stage 1) and fish in the stage of early maturation (stage 2). Stage 3 ... . gunnaui. Maturity Stage 1. Immature 2. Early maturation 3. Advanced maturation 4. Total ... correspond with the macroscopic (i.e., unaided visual observation) scale commonly used. The first five ...

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

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