Résultats de la recherche

1. A balanced model of the food web of the Ross Sea, Antarctica

   recent year (1990–2000). The focus of the model is on the role of Antarctic toothfish in the food web ... levels are in close agreement with those derived from isotope and other ecosystems. In the balanced model ... fixed at zero. Models such as this are highly under-constrained, with >3 times more parameters to fit ... average recent year (1990–2000). The focus of the model is on the role of Antarctic toothfish in the food ... %), components of the model. Trophic levels are in close agreement with those derived from isotope and other ... al., 2007). The aim of the present study is to model an average or typical year, rep- resentative of ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 1–31 : Auteur(s): Pinkerton, M.H., J.M. Bradford-Grieve and S.M. Hanchet

2. Preliminary results of investigations of the Federal Republic of Germany on Notothenia rossii marmorata (Fischer, 1885) in January/February 1985

   rebuild the stock around South Georgia might be successful. Although reported catches in recent years have ... sealers i.n the early 19th (F.~NXT:iG, 1833) and whale.re-, in the early LO th r:0nt1Jries (LbNNBERG ... Ishlnd is still under investigation t!1i~ paper deals mainly with the South Georgia stock. 2 ... February) and 37 hauls off Elephant Island (21 - 28 February) using a 200' bo- torn trawl with a sr.1211 ... . Maturity in males is reached at a smaller size and about one year earlier than in females. - 40 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 33-57 : Auteur(s): Kock, K.-H.

3. An assessment of CCAMLR measures employed to mitigate seabird mortality in longlining operations for Dissostichus eleginoides around South Georgia

   operations for Dissostichus eleginoides off South Georgia were assessed for interactions with seabirds and ... lines were laid from March to May 1997 using the Spanish double-line method. In accordance with CCAMLR ... sampling of toothfish was taking place, and as far as possible to cover the early, middle and late stages ... hauling after setting of the line had continued into early daylight hours on 3 April: these were ... Longlining operations for Dissostichus eleginoides off South Georgia were assessed for interactions with ... with CCAMLR conservation measures, lines were set at night, weights (6-7 kg) were set at 50 m ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 217–230 : Auteur(s): Ashford, J.R. and J.P. Croxall

4. Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle

   found in catches throughout the year (Figure 4a). Females with gonads at maturity stage IV were ... about 10%. In the southern and eastern areas, only individual fi sh were found with mature gonads ... (i.e. by 3 years old) most C. gunnari migrate northwards, where they remain for most of the year ... 400 m in commercial catches. Fish distribution by depth varied throughout the year (Figure 3). In ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Auteur(s): Frolkina, Zh.A

5. An assessment of the impact of krill fishery on penguins in the South Shetlands

   . Compared with the level of biomass (≥200 x 10 3 tonnes) and its variability (the order of 100  x 10 3 ... constant (3 000 to 10 000 tonnes/10-day period) due to an increase in fishing intensity in areas closer to ... large as 200 to 1 500 x 10 3 tonnes within the preferred fishing areas during the breeding season ... tonnes/10-20-day period), the present catch rate (≤10  x 10 3 tonnes/1O-day period) is smaller by one or ... fishery began with a low catch in late December, followed by catches of 3 300 to 10 000 tonnes/lO-day ... about 3 to 25 km offshore, irrespective of annual conditions, i.e., even in a krill-poor year (AMLR ... Shetland Islands. 200, 1 000 and 3 000 m depth contours are shown. I / ~ ~ l I l / l I I / l EARLY ... within the preferred fishing areas during the breeding season. Compared with the level of biomass (2200 ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Auteur(s): Ichii, T., M. Naganobu and T. Ogishima

6. Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change

   the loss of existing marine habitats and to the creation of new habitats, with consequent changes in ... - ed to be felt across the Antarctic as the ozone hole heals, with a predicted warming of about 3°C ... of the George VI ice shelf (67.840°W 71.692°S) which lost ~993 km2 over a number of years between ... will lead to the loss of existing marine habitats and to the creation of new habitats, with consequent ... retreat of ice shelves on both sides of the peninsula. Loss of ice on the eastern side results from warm ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Auteur(s): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock

7. Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia

   allows simulation of releases by box over multiple years. The model performed as expected with test ... over multiple years. The model performed as expected with test situations. It produced a near-perfect ... whole of the fishing area in recent years (SC-CAMLR, 2004), but in the early years there was a ... in that year 40 W 43 3 0' W 48 0 0' W M an ag em en t A re a A (W es t S ha ... as km/year. The available data comprised animals that had been recaptured after 1, 2, 3, 4 and 5 ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Auteur(s): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark

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

   of each method of sampling krill, i.e. with nets (for historical time series, demographic information ... with sea-ice and diet. Whether this reflects ‘subpopulations’ with regionally specific life cycles is ... occurred year- round throughout Antarctica, and regularly with an estimated ~20% of the stock deeper than ... the southwest (SW) Atlan- tic sector with 75% of the population in the 0–90°W sector (Marr, 1962 ... Atlantic sector. However, around Prydz Bay (Indian sector) Pakhomov (2000) found that 3–4-year cycles ... potentially valuable resource (Nicol et al., 2011); and (iii) the species is associated with sea-ice for its ...

   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)

9. Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen

   showed discrepancies due to gear-specific catchability, or differences in the available population with ... estimated to be –0.6 years and residual variance 2.9. Age distributions of toothfish caught by two vessels ... trawlers and longliners at Kerguelen, and longevity was estimated to be 36 years. Total instantaneous ... and between years. Differences in q between the two vessels, as well as availability with depth ... . Chapman, D.G. and D.S. Robson. 1960. The analysis of a catch curve. Biometrics, 16 (3): 354–368. Everson ... in the available population with depth or season. Age–length keys were constructed for use in ... смертности Z по оценке лежит в диапазоне Ashford et al. 30 Introduction In contrast to early sealing ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 29–41 : Auteur(s): Ashford, J., G. Duhamel, C. Jones and S. Bobko

10. Breeding numbers and success of Eudyptes penguins at Marion Island, and the influence of mass and time of arrival of adults

    penguins (Eudyptes chrysolophus) over 26 years, as there was also for eastern rockhopper (E. chrysocome ... -scale environmental phenomena. For macaroni penguins, breeding success was significantly correlated with ... with that of females. Although both species had low masses on arrival after the El Niño Southern ... filholi) over 22 years, suggesting that overwintering conditions may influence the proportions of birds ... (Eudyptes chrysolophus) over 26 years, as there was also for eastern rockhopper (E. chrysocome filholi ... season, means are shown with standard deviations and ranges. M as s (k g) 7 6 5 4 3 7 6 5 4 ... with standard deviations and ranges. 19 94 /9 5 (a) M as s (k g) 3 2 1 5 4 3 2 4.5 3.5 ... with mass of chicks at fledging. For both species, mass on arrival of males was significantly ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 175–190 : Auteur(s): Crawford, R.J.M., B.M. Dyer, J. Cooper and L.G. Underhill

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