Résultats de la recherche

1. Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994

   during hauls. The 16 sets made at night contributed 15% of overall mortality, all of white-chinned ... disproportionately affected in relation to the size of their breeding population at South Georgia when compared to ... -seven line sets were observed and 98 deaths of seabirds were recorded over 20 sets; no deaths occurred ... petrels (Procellaria aequinoctialis); the four day sets contributed 85% of deaths, with giant petrels ... deaths of seabirds were recorded over 20 sets; no deaths occurred during hauls. The 16 sets made at ... affected in relation to the size of their breeding population at South Georgia when compared to ... of day, and was affected by behavioural interactions between birds. Setting only at night would ... in each period. Reports on the effectiveness of measures aimed at mitigating incidental mortality ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Auteur(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

2. Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica

   the data. Length-at-maturity and age-at-maturity ogives indicated that 50% of the fish sampled were ... mature at about 340–360 mm total length (TL) and about 3–4 years of age, and that 95% were mature at ... , meristics, reproductive biology, diet and age estimation. All of the icefish sampled were identified as ... between December and February, but this was limited, probably due to the short temporal distribution of ... February, but this was limited, probably due to the short temporal distribution of the data. Length-at ... - maturity and age-at-maturity ogives indicated that 50% of the fish sampled were mature at about 340–360 mm ... total length (TL) and about 3–4 years of age, and that 95% were mature at about 370–400 mm TL and 6–8 ... , Wj,x the weight of the jth fish of sex x at length Lj,x is β= α ,, , j xx e j x x j xW L e (2 ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Auteur(s): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott

3. A hypothetical life cycle for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region

   Sea region Abstract / Description:  Aspects of the reproduction, size distribution and movements of ... location and timing of spawning and the probable early life-history characteristics of toothfish, the drift ... of eggs and larvae over a 6–24 month period were investigated using an oceanic circulation model ... locations of toothfish larvae after an 18–24 month period were moderately consistent with the distribution ... Vries (2000) summarised Yukhov’s research and related it to their studies of D. mawsoni at McMurdo ... Simulator in Japan as part of a joint research project with the Hadley Centre at the UK Meteorological ... with a peak in December. The timing of spawning at the South Shetland Islands is unknown, but ... . Most of the 43 larval and early juvenile stages (18–63 mm SL) were caught at night and in the upper ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 35–53 : Auteur(s): Hanchet, S.M., G.J. Rickard, J.M. Fenaughty, A. Dunn and M.J. Williams

4. Species identification and age estimation for the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   exhibited a degree of sexual dimorphism. The age at which 50% of fish are sexually mature was estimated to ... whitsoni) from the Ross Sea Abstract / Description:  Samples of macrourid rattail by-catch from the ... Zealand for subsequent confirmation of their identity by researchers from the National Institute of Water ... the geographic source of the aged sample. Counts of translucent zones were made from baked and cross ... exhibited a degree of sexual dimorphism. The age at which 50% of fi sh are sexually mature was estimated ... size class at which more than 50% of the fi sh sampled were at maturity stage 2 or greater. The ... at maturity and mean age at maturity. RESULTS Species Identifi cation Of the 361 individually ... estimates of the t0 values. Natural Mortality In all the available age data, 1% of males were at least 55 ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 37–51 : Auteur(s): Marriott, P., P.L. Horn and P. McMillan

5. Estimating optimal observer coverage in the Antarctic krill fishery

   is proposed that an efficient sampling proportion, at least for South Georgia, should be >50% of ... / 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 ... Marine Fisheries Service of the USA (Barbeaux et al., 2005). Most observer schemes operate at least a ... ) is dependent on the relative variance components at each stage of the sampling design (Volstad et ... analysis (VCA) was then used to investigate the relative importance of sampling at either the inter ... observed at least once in the seven-year period, and the overlap of observed hauls with total hauls in ...

   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

6. Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands

   deployed at a level of 30 m from the surface because at this level krill concentrations are most frequently ... that in previous seasons. Total biomass of krill in shelf waters of the area surveyed was estimated at ... 1990/91 a survey was conducted by RV Kaiyo Maru in the vicinity of the South Shetland Islands and ... Elephant Island. The main objective of the survey was to investigate the mechanisms responsible for the ... circulation was studied with satellite-tracked buoys equipped with curtain drogues deployed at a level of 30 ... seasons. Total biomass of lain in shelf waters of the area surveyed was estimated at 1.78 million tonnes ... . RESULTS 3.1 Physical Oceanography Figure 3 shows the horizontal distribution of salinity at 30 m depth ... fishing trawler operated at that time not only to the north of Livingston Island but also to the north of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Auteur(s): Ichii, T., H. Ishii and M. Naganobu

7. Cephalopod research in the Antarctic

   of future commercial exploitation. Research is being carried out at BAS on the species composition ... major component of the Antarctic marine food web and it seems inevitable that they will be the subject ... and distribution of Antarctic cephalopods, their production and biomass, population dynamics and ... trophic relations. However, there is insufficient information at present for CCAMLR to formulate effective ... exploitation. Research is being carried out at BAS on the species composition and distribution of Antarctic ... insufficient information at present for CCAMLR to formulate effective policy for management of Antarctic ... distribution of other species and at different geographical locations. - 327 - Production and Biomass ... developed and a growth experiment has been run with Sepia officinalis, fed at a range of food rations and ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 323-334 : Auteur(s): Rodhouse, P.G.

8. The fishery for Patagonotothen brevicauda guntheri in CCAMLR Subarea 48.3

   only ever caught at Shag Rocks. Therefore the South Georgia catches were almost certainly of another ... / Description:  Fine-scale data supplied to CCAMLR for 1987/88 showed that the catches of P atagonotothen ... brevicauda guntheri were five times greater in the South Georgia area than at Shag Rocks. Previous survey ... species. The small size of P.b. guntheri means that they can only be caught with net meshes so small that ... allowable catch (TAC) was set at 12000 tonnes (Conservation Measure 16NIII). At the end of the fishing ... information on the fishery. 2. FINE-SCALE DATA ON THE P.B. GUNTHERI FISHERY At the time of preparation of ... likely to be dominated by small individuals. Of particular concern is Dissostichus eZeginoides at Shag ... indicated that P.h. guntheri are not found at South Georgia, reported catches of this species in South ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 275–283 : Auteur(s): Everson, I. and C. Mitchell

9. Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data - Autumn 1989/90

   Islands was assessed at 3.8 million tonnes, most of which was concentrated in the waters of the Weddell ... 1989/90 Abstract / Description:  A krill biomass census survey was carried out at two fishing grounds ... Sea. In contrast to this site, the one off the South Orkney Islands is well-established in terms of ... tonnes. Most of this stock was concentrated in the south-western part of the Coronation Island shelf ... method (0-100-0 m) at a towing speed of 3.2 to 3.6 knots. Trawling depth was controlled by a trawl probe ... census survey was carried out at two fishing grounds in the South Sandwich and South Orkney Islands ... stock on the poorly studied site off the South Sandwich Islands was assessed at 3.8 million tonnes ... , most of which was concentrated in the waters of the Weddell Sea. In contrast to this site, the one ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Auteur(s): Fedotov, A.C.

10. Editorial

    and at-sea operations. A total of 104 working papers were presented at these meetings. This volume ... paper looking at market predictors of the future krill fishery. Publication of this volume of CCAMLR ... Paper Title:  Editorial Abstract / Description:  This is the 18th volume of CCAMLR Science and the ... contents reflect the important science that supports CCAMLR’s management of the marine living resources of ... operations. A total of 104 working papers were presented at these meetings. This volume con- sists of papers ... at market predictors of the future krill fishery. Publication of this volume of CCAMLR Science ... Science, Vol. 18 (2011): 167 167 This is the 18th volume of CCAMLR Science and the contents reflect the ... important science that sup- ports CCAMLR’s management of the marine living resources of the Southern Ocean ...

    Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 167 : Auteur(s): Editors

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