Résultats de la recherche
-
Characteristics of krill aggregations in the South Sandwich Islands subarea in January–February 2000
Paper Title: Characteristics of krill aggregations in the South Sandwich Islands subarea in ... February 2000 it was observed that krill was present in non-aggregated and scattered forms, as well as in ... swarms. Differences between spatial distribution patterns of different krill aggregation forms in ... characteristics of some 2 400 krill swarms detected in the study area were sized acoustically and are described in ... were dominant in the zones of high density (over 20 g m-2) observed there. Vertical Distribution of ... le 1 : Pr in ci pa l p ar am et er s of th e m id w at er tr aw l P T 7 2/ 30 8 ... 59°S 60°S 61°S 200 g m-2 20 g m-2 2 g m-2 0.2 g m-2 31°W 30°W 29°W ... in Subarea 48.4 Figure 3 continued 240 220 200 180 160 140 120 100 80 60 40 20 0 60°11' S ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 145–164 : Auteur(s): Kasatkina, S.M., A.P. Malyshko, V.N. Shnar and O.A. Berezhinsky
-
Optimization of survey sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins
Paper Title: Optimization of survey sampling design in the detection of interannual variability ... and prey size selectivity in the diet of penguins Abstract / Description: Based on the preliminary ... results of a survey of prey size in Adélie penguins, sampling designs intended for the detection of inter ... -annual variations in mean prey size and penguin size-related selectivity were analyzed in order to find ... interval for ai resulted in n=16. This value defines the size of sub-samples at the year level assuring ... ), comparison between years results naturally in a new level added at the top. Exact F tests are obtained ... penguins sampled each day, c?oCY is the variance component of "dates-in-years" group, nD is the number ... confidence intervals respectively: = 2.63 ~ 3 = 25.03 :::; 26 A 10% change in the mean of two years ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 551–559 : Auteur(s): Marschoff, E. and B. Gonzalez
-
Experimental evaluation of the effectiveness of weighting regimes in reducing seabird by-catch in the longline toothfish fishery around South Georgia
Paper Title: Experimental evaluation of the effectiveness of weighting regimes in reducing ... seabird by-catch in the longline toothfish fishery around South Georgia Abstract / Description: A series ... of experiments was carried out in February 1999 at South Georgia (Subarea 48.3) to examine the ... attached at 40 m intervals on a Spanish-rigged longline. There was a significant reduction in bird ... required by the conservation measure (6 kg at 20 m intervals) was derived from a study of bird strikes in ... which has participated in the longline fishery around South Georgia for the past several years, and ... EVALUATION OF THE EFFECTIVENESS OF WEIGHTING REGIMES IN REDUCING SEABIRD BY-CATCH IN THE LONGLINE ... Abstract A series of experiments was carried out in February 1999 at South Georgia (Subarea 48.3) to ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 119–131 : Auteur(s): Agnew, D.J., A.D. Black, J.P. Croxall and G.B. Parkes
-
Preliminary results of research activities of RV Evrika in the Scotia Sea in January-March 1988
Paper Title: Preliminary results of research activities of RV Evrika in the Scotia Sea in January ... -March 1988 Abstract / Description: In 1987/88 a multi-disciplinary survey was conducted of the Scotia ... South Georgia in particular were surveyed twice. Research activities are part of the program implemented ... in areas of the Atlantic Sector of the Southern Ocean identified for monitoring by CCAMLR. During the ... '~'-- ---''''''~ Geostrophic circulation on the surface in relation to 1 000 decibar (20 January-9 March 1988). 'I 14 ... fill· 30' Distribution of primary production (mg C/m-2/d-1) in the photosynthetic layer ... Euphausia superba (g/1 000 m-3 ) in the layer of 0-100 m (20 January-9 March 1988). Figure 7: t:5 VI ... ACTIVITIES OF RV EVRIKA IN THE SCOTIA SEA IN JANUARY-MARCH 1988 L.1. Maklygin , A.S. Fedorov, V.N. Shnar ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 215-229 : Auteur(s): Maklygin, L.I., A.S. Fedorov, V.N. Shnar, Yu.A. Shulyakovsky, I.V. Krasovsky, Yu.D. Shuvaev and A.V. Kromsky
-
Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
Paper Title: Results of a longline survey on seamounts in the southeast Atlantic and in Subarea ... Antarctic Polar Front (Meteor Bank) and in the CCAMLR region (Shona and Spiess seamounts, the western slope ... the isobaths and in depths down to 1 500-2 000 m. Numerically, catches were dominated by Patagonian ... substantially in relation to seabed topography, species composition of catches, and relative abundance and size ... RESULTS OF A LONGLINE SURVEY ON SEAMOUNTS IN THE SOUTHEAST ATLANTIC AND IN CCAMLR SUBAREA 48.6 (ATLANTIC ... ) and in the CCAMLR region (Shona and Spiess seamounts, the western slope of Bouvet Island, Ob and Lena ... Banks). Samples were collected from longlines set perpendicularly to the isobaths and in depths down to ... . eleginoides comprised 20.502 tonnes (96%). The seamounts differed substantially in relation to seabed ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Auteur(s): López Abellán, L.J. and J.F. González Jiménez
-
Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using Japanese fishery data
Paper Title: Characteristics of seasonal variation in diurnal vertical migration and aggregation ... of Antarctic krill (Euphausia superba) in the Scotia Sea, using Japanese fishery data Abstract ... / Description: Seasonal variation in the diurnal vertical migration and aggregation of Antarctic krill ... change during summer and winter in SS and SO. Daily average trawling depth tended to be shallower during ... : 82–90. Ritz, D.A. 1994. Social aggregation in pelagic invertebrates. Adv. Mar. Biol., 30: 155–216 ... (2005): 163–172 163 CHARACTERISTICS OF SEASONAL VARIATION IN DIURNAL VERTICAL MIGRATION AND ... AGGREGATION OF ANTARCTIC KRILL (EUPHAUSIA SUPERBA) IN THE SCOTIA SEA, USING JAPANESE FISHERY DATA K. Taki ... -ku, Shizuoka, 424-8633 Japan Email – takisan@affrc.go.jp Abstract Seasonal variation in the diurnal ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 163–172 : Auteur(s): Taki, K., T. Hayashi and M. Naganobu
-
Large-scale peculiarities of phytocenosis species composition in the surface layer in the Antarctic Atlantic and Indian Ocean sectors
Paper Title: Large-scale peculiarities of phytocenosis species composition in the surface layer ... in the Antarctic Atlantic and Indian Ocean sectors Abstract / Description: In surface phytoplankton ... Weddell Gyre. In the eastern Weddell Gyre a great change in the composition of phytoplankton species was ... registered. Variability in phytoplankton species composition occurred mainly in the Antarctic Convergence ... PHYTOCENOSIS SPECIES COMPOSITION IN THE SURFACE LAYER IN THE ANTARCTIC ATLANTIC AND INDIAN OCEAN SECTORS ... R.R. Makarov and K.P. Fedorov Abstract In surface phytoplankton samples (layer between 0 and 1 m ... the distribution of the south peripheral waters and the centre of the Weddell Gyre. In the eastern ... Weddell Gyre a great change in the composition of phytoplankton species was registered. Variability in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 201-214 : Auteur(s): Makarov, R.R. and K.P. Fedorov
-
Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3
prevent the expected lowest biomass of krill over a 20-year harvesting period from falling below 60% of ... year, depending on how many of the previous three years' CPUE values fall below a target level of ... Paper Title: Towards an initial operational management procedure for the krill fishery in ... (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status ... ) Average annual catch over 20 years: Cav (objective n.). (ii) Catch in twentieth year: C20• 197 ... the management procedure. TAC in year y. Average annual catch over the first 20 years of operation ... of the management procedure 20 ( L Cy/20) y=l TAC in twentieth year of operation of the ... a 20-year projection of the kriU operating model. The means and standard deviations (in parenthesis ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Auteur(s): Butterworth, D.S.
-
Consideration of major issues in ecosystem monitoring and management
Paper Title: Consideration of major issues in ecosystem monitoring and management Abstract ... interactions and the manner in which their populations vary naturally. Large-scale interactions are catered for ... in the Krill Yield Model (KYM). Smaller-scale interactions centre around three main categories: the ... availability of krill, variation in vital rates of the dependent species and the overlap between commercial ... 10000 15000 0 10 20 30 40 50 60 70 80 90 100 Year Po pu la tio n si ze Recruitment fails twice ... all the requirements of Article II will be met. This is for two reasons. Firstly, errors in ... year classes. In theory, this can come from an analysis of length-density distributions, although ... by Hewitt (2000), who defi ned a proportional recruitment index that was derived by comparing year ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Auteur(s): Everson, I
-
Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
conservatively estimated subarea biomass in up to 20% of years due to high variability in krill biomass indices ... 1991, is 0.62 million tonnes year –1, equivalent to ~1% of the regional biomass estimated in 2000. Each ... Paper Title: Is current management of the Antarctic krill fishery in the Atlantic sector of the ... krill (Euphausia superba) fishery in the Atlantic sector of the Southern Ocean, and current knowledge ... catch limits exceed 9.3% of conservatively estimated subarea biomass in up to 20% of years due to high ... ‘trigger level’), established in 1991, is 0.62 million tonnes year–1, equivalent to ~1% of the regional ... tonnes year–1, since 2009. There is some evidence for a decline in the abundance of krill in the 1980s ... more than about 1 year) in the upper 500 m of the water column. Krill are also found in lower numbers ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Auteur(s): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins