Résultats de la recherche
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Potential impacts of bottom trawling on benthic communities in Prydz Bay, Antarctica
Paper Title: Potential impacts of bottom trawling on benthic communities in Prydz Bay, Antarctica ... Abstract / Description: This paper presents data on benthos retrieved in bottom trawls during a survey of ... examine a potential impact of bottom trawling on benthic communities in this region. The benthos was ... unfished areas in the South Atlantic and suggested that bottom trawling in the past 20 years has had a ... wide with a headline height of 4 to 5 m. Nets were towed for a standard haul duration on the bottom of ... Bay in February 1991 showed that on most occasions the biomass of benthos in the codend after a 30 ... Messrs R. Williams and P. Heyward for their comments on the manuscript. REFERENCES CLARKE, A. 1979 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 403–410 : Auteur(s): Constable, A.J.
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Diurnal variations in biological characteristics of krill, Euphausia superba Dana, to the west of the South Orkney Islands, 24 March to 18 June 1990 - based on data reported by a biologist-observer
trawl (9 to 12 tows per station, over one day). An increase in the total average size of animals caught ... in the catch, as well as an increased difference between average length of males and females in the ... , to the west of the South Orkney Islands, 24 March to 18 June 1990- based on data reported by a ... Euphausia superba were carried out on the commercial trawler Grigory Kovtun near the South Orkney Islands ... stations may be subdivided into two groups. Stations I, IT, IV and VI tended towards an increase in krill ... males is clearly visible for Stations I and 11 and more or less clear correlation can be seen on the ... one day). An increase in the total average size of animals caught in periods of light or darkness was ... noted at several stations. Increases in the proportion of males in the catch, as well as an increased ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Auteur(s): Vagin, A.V., R.R. Makarov and L.L. Menshenina
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean.
. mawsoni on BANZARE Bank is similar to that hypothesised for the Ross Sea population with analogous ... two species by depth may be related to physical intolerance to cooler temperatures because of the lack ... Paper Title: Distribution and population structure of Dissostichus eleginoides and D. mawsoni on ... fishing seasons (December–February) from 2006/07 to 2008/09. Dissostichus eleginoides was mainly caught on ... longline set and mean CPUE for Dissostichus eleginoides (black) and D. mawsoni (red). 0 10 20 30 ... . Constable and G.B. Nowara. 2008. An assessment of the exploratory fishery for Dissostichus spp. on ... recorded for up to 30 individuals. Gonad stages were usually recorded using the CCAMLR five-point staging ... significantly larger than that of males (97.5–106.3 cm) (two- sample t-test; P < 0.001) for each fishing season ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 145–153 : Auteur(s): Taki, K., M. Kiyota, T. Ichii and T. Iwami
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Methodological guidelines on the assessment of trawl catchability of krill by means of statistical modelling
of the problem and the development of an algorithm for its solution. A detailed description is given ... of statistical modelling Abstract / Description: This paper offers an approach to the assessment of ... used as a basis. The Monte-Carlo method is useful for solving problems related to the quantitative ... of various configurations. The algorithm for solving this problem is constructed in such a way that ... problem and the development of an algorithm for its solution. A detailed description is given of the ... - List of Tables Examples of arrays Z2(i) for two methods biperiods (Fig. 5 a.6). Xl(i). X2 (i ... ~ %.008y?3 T.O nepeHTH K n. 29 (KaK HEn. 10, s~eCb 008~ = Vl - 6 2~, HHa~e - npo~on~Tb. 20. OnpoKH ... . 31, HHa~e - npo~o~HTD. 30. npO~on~eHHe ~HKna no j (T.e. npo~o~eHHe cepHH 9KC- nepHMeHToB: j = j ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 195-222 : Auteur(s): Kizner, Z.I.
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Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
vary from 1:1. Females accounted for 70% of individuals of more than 90 cm in total length. The stratum ... Paper Title: Results of a longline survey on seamounts in the southeast Atlantic and in Subarea ... between areas. Catch per unit effort ranged from a maximum value of 359 kg/1 000 hooks on Ob and Lena ... Banks to a minimum of 185 kg/1 000 hooks on Meteor Bank. File: 08lopez-abellan.pdf ... P.A. Hulley and an anonymous reviewer for their useful comments on the manuscript and for pointing ... the recommen- dations of the CCAMLR Workshop on Methods for the Assessment of D. eleginoides (SC ... -CAMLR, 1995). The development and consolidation of fisheries for D. eleginoides on existing grounds ... strata surveyed in the two regions (Figure 5). A greater percentage of large individuals was present on ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Auteur(s): López Abellán, L.J. and J.F. González Jiménez
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Small scale krill surveys: simulations based on observed euphausiid distributions
norvegica is used to model the effects of krill swarm orientation and shape on the success of two proposed ... Abstract / Description: An observed distribution of aggregations of the euphausiid, Meganyctiphanes ... lowest for the survey design utilising parallel transects set at right angles to the long axis of the ... Paper Title: Small scale krill surveys: simulations based on observed euphausiid distributions ... required for the purposes of the CEMP program. 2. METHODS Two maps of euphausiid distributions are ... into two areas, divided by 100 x 100 grids (distributions A and B, Figure la,). An additional ... as a percentage and taken to represent mean krill density for the transect. This is an equivalent ... transects required to reliably detect changes of 20%, for instance, is 28 when the CV is 0.3 and 310 when ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 245–256 : Auteur(s): Agnew, D.J. and S. Nicol
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On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)
composition of catches from 1964/65 to 1968/69 and the age/length key for the first half of 1972 were used in ... the calculations. The results provided a wide range of estimates for M. The discussion of the results ... suggested that M =0.56 should be used in stock assessment for C. gunnari in Subarea 48.3. File: 19-Frolkina ... Paper Title: On the instantaneous natural mortality rate of Champsocephalus gunnari, South ... effort in year y; and F y = rate of fishing mortality in year y. VP A is tuned to various values for ... wide range of estimates for M (from 0.16 to 1.13). It is interesting to observe that in two of the ... bottom two rows of Table 6 present the mean estimates of M for each season and for the whole period. The ... determined using two procedures for calculations. Age 1964/65 1966/67 1967/68 1968/69 1964-69 1964-69 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Auteur(s): Frolkina, G.A. and R.S. Dorovskikh
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
fishery Abstract / Description: An experiment was conducted on autoline and Spanish-system longline ... . Sink rates to 4 m depth were greatest with 35 m (0.44 m/s) and 50 m (0.33 m/s) between weights. For ... /s should greatly reduce the incidental take of albatrosses. For autoline vessels with gear and line ... Paper Title: Effect of line sink rate on albatross mortality in the Patagonian toothfish longline ... seabirds killed (SC-CAMLR, 1997). Two methods are adopted in the CCAMLR Convention Area for the ... rates to 4 m depth for these two weight spacings (0.44 m/s and 0.37 m/s respectively) were appreciably ... -browed albatrosses) and white-chinned petrels for about 20 and 33 S respectively. At 200 m spacings ... and managed on board, and in operational procedures that affect seabirds. For instance, autoline ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Auteur(s): Robertson, G.G
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On assessment of Bertalanffy growth equation parameters and instantaneous natural mortality rate of South Georgia mackerel icefish
mortality rate of South Georgia mackerel icefish Abstract / Description: An analysis and summary of ... icefish (Champsocephalus gunnari) for 1965 to 1987 is presented. The results enable the calculation of ... reliable weight-length equations for males and females by season and the verification of parameters for the ... Paper Title: On assessment of Bertalanffy growth equation parameters and instantaneous natural ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 29–36 : Auteur(s): Frolkina, Zh.A. and R.S. Dorovskikh
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Methodology of data collection on net selectivity and accidental mortality of fish passing through the mesh of the codend
mesh selectivity factors for trawl codends using a special liner. The design and technical ... specifications of the liner are described. It also describes an experiment to determine the accidental mortality ... handling for mesh selectivity studies. File: 05-VNIRO-USSR.pdf ... Paper Title: Methodology of data collection on net selectivity and accidental mortality of fish ... 3 13 23 4 14 24 5 15 25 6 16 26 7 17 27 8 18 28 9 19 29 10 20 30 - 114 - ___ .n ... (U.S.S.R.) Abstract This paper contains advice on determining mesh selectivity factors for trawl ... codend. It contains proposals on standardising data collection and handling for mesh selectivity ... also describes an experiment to determine the accidental mortality of fish passing through the trawl ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 99-121 : Auteur(s): VNIRO (USSR)