Search results
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Selectivity of standard Polish commercial trawl codends on Antarctic fishing grounds
to interpret the results obtained in an objective and convincing way. 2. OBJECTIVE OF THE STUDY After ... from the codend only from the part equipped with the cover. They were later trapped in the end parts ... in the upper part of the codend at a distance of not more than 2 m from the codend ending and 2 meshes from ... immediately after the trawl retrieval (wet) with an international ICES caliper, at a preliminary tension ... of 4.2 mm. The studies covered 6 major fish species. It appears from the study that Antarctic icefish ... and bumphead notothenia are subject to selection during trawling, although the effectiveness of this ... process- especially in the latter case- is not satisfactory. Scotia Sea icefish, Chaenodraco wilsoni, and ... Chionodraco rastrospinosus exhibit a lower tendency to pass through meshes of the codend than Antarctic ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 107-142 : Author(s): Zaucha, J.
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Protecting young fish and spawning aggregations of Champsocephalus gunnari in Subarea 48.3 (South Georgia): a review
20 November 1989 to 15 Januar 1990 and from I April 1990 to tze end of theCommission meeting ... CCAMLR 'fishin year' would begin on 1 December of each year and end on 30 November of the fc%owing year ... fish to ensure that sufficient numbers After the original drafting of this paper, during the 1999 ... is the long closed season between 1 April and the end of the following Commission meeting, first introduced ... Subarea 48.3 (South Georgia): a review Abstract / Description: The need to protect young fish and ... spawning aggregations in fisheries generally, and specifically in the Champsocephalus gunnari fishery in ... Subarea 48.3, is reviewed. Mechanisms available to achieve these objectives are discussed, including the ... measures put in place by CCAMLR to date. These measures are re-examined in the light of new information ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 75–86 : Author(s): Parkes, G.B
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Biomass of myctophids in the Atlantic sector of the Southern Ocean as estimated by acoustic surveys
results of calibrations to standard target TSst = -33.6 dB, completed at the beginning and at the end ... Paper Title: Biomass of myctophids in the Atlantic sector of the Southern Ocean as estimated by ... acoustic surveys Abstract / Description: Acoustic surveys carried out in the summer and autumn of 1987 ... -1989 estimated the biomass of myctophids in the Atlantic sector of the Southern Ocean between 48° and ... 56° and from 8° to 48°W to be approximately 1.7x10 6 tonnes. Over the greater part of the surveyed ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 417–431 : Author(s): Filin, A.A., K.V. Gorchinsky and V.M. Kiseleva
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Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994
and close to the main line. After the first 20 sets, a streamer line meeting CCAMLR specifications ... 2 m from the hauling point with a single discharge of offal at the end of a haul and (ii) bird density ... petrels observed coincided with the end of their breeding season. Behavioural strategies may also ... the subsequent set, especially if this occurs in the same area or follows immediately after the haul ... during hauls. The 16 sets made at night contributed 15% of overall mortality, all of white-chinned ... petrels (Procellaria aequinoctialis); the four day sets contributed 85% of deaths, with giant petrels ... disproportionately affected in relation to their numbers near the fishing vessel; giant petrels may be ... disproportionately affected in relation to the size of their breeding population at South Georgia when compared to ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Author(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno
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The effects of monitoring procedures on Adélie penguins
adult birds carrying both bands and tags by the end of the 1992/93 season) of one tag failing after ... and/or increased mortality occur after more than one year of band wear remains to be determined from future years ... , the end of which had penetrated the elbow joint. Closed stainless steel bands transferred at regular ... estimated at 22% during the first year after banding (Weimerskirch Effects of Monitoring Procedures ... Paper Title: The effects of monitoring procedures on Adélie penguins Abstract / Description: The ... effects of flipper bands, implanted tags, gastric lavage and external instrument attachment on the ... , Antarctica. The return rates of birds carrying bands and/or implanted electronic transponders were compared ... to investigate the contribution of bands to bird mortality and to determine rates of band and tag ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 155–164 : Author(s): Clarke, J. and K. Kerry
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A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia
of population structure have been obtained from krill eaten by predators at the western end of South Georgia ... from both the eastern and western ends of South Georgia were selected for further analysis by Watkins ... of the paper. After the length-frequency distributions within an area have been combined and weighted ... as the proportion of l + animals in the total population in the year after spawning, R2 as the pro ortion ... Paper Title: A composite recruitment index to describe interannual changes in the population ... substantial differences, due in part to bias arising from a large number of krill in just one of the station ... net hauls. Therefore, when the number of station net hauls is limited, bias is likely to be reduced if ... target net haul data can be included by using the composite recruitment index. This index is used to ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Author(s): Watkins, J.L
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Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides and Champsocephalus gunnari
four weeks after fishing started and up to four birds were seen from then until the end of fishing ... . As with the longline fishery, the capture of birds was only observed after the end of the brood stage of the chicks ... , towing and hauling. The behaviour of the birds can be summarised as follows: After the first few ... , either sitting in large groups on the water close to the ship or flying across the stern area. After ... and Champsocephalus gunnari Abstract / Description: The behaviour of seabirds and the rate of ... (Dissostichus eleginoides) in the 1994/95 season near Macquarie Island and Kerguelen Island. Longlining for D ... seabirds were constantly observed near the vessels, especially giant petrels (Macronectes halli and M ... associated with longlining in the Kerguelen region were lower than those reported for the South Georgia area ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 93–99 : Author(s): Williams, R. and D. Capdeville
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Characteristics of krill swarms from Prydz Bay
is particularly important in determining the end or the continuation of a swarm if the ping sequence of a swarm ... of about 18 m (1 ping) after 1808 hours compared with about 3.5 m before this time. Figures 2a and b show ... to 2 pings (about 36 m) after 1808 hours. Intercepted swarm length, observed between swarm distance, swarm ... by the decreased ping rate after 1800 hours discussed above, and the true modes lie at 3-3.5 and 4.4-4.6 ... Paper Title: Characteristics of krill swarms from Prydz Bay Abstract / Description: The ... CCAMLR.AUS dataset available to the Subgroup on Survey Design was derived from a survey of Prydz Bay ... inter-swarm length were calculated for swarms of euphausiids encountered along a 78 km transect over the ... continental shelf close to the CEMP study site at Magnetic Island. The euphausiid species was probably ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 177–189 : Author(s): Agnew, D.J. and I.R. Higginbottom
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Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia
approach. To this end it would be valuable to obtain better data coverage at finer scales in the areas ... autumn period may be important in determining the condition of chinstrap penguins at the end ... Georgia in January 1996: the beginning of a five-year monitoring program. Document WG-EMM-96/18. CCAMLR ... Paper Title: Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed ... distribution around South Georgia Abstract / Description: Analyses of the distribution of krill fishing based ... on fine-scale (0.5 o latitude x 1 o longitude) data show that harvesting in the Scotia Sea has been ... mainly in shelf and shelf-break areas on the northern side of the Scotia Arc. Regional analyses reveal ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Author(s): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt
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Validation of sink rates of longlines measured using two different methods
on the sink rates caused by the anchors at either end of the lines. When lines were set during the day ... used 50 cm lengths of 9 mm polyester rope of which both ends were eye-spliced (Figure 1). A 12 cm ... , was fastened to the end of the cord. The end of the string was loosely attached to the bottle with a piece ... with a One-Way Analysis of Variance after tests for normality and homogeneity were passed. For comparisons ... of the ground line – IW-50 lines) were measured during commercial fishing operations using two ... = –0.181, P = 0.859). When the target depth was 15 m, sink rates measured using the bottle method (0.20 ... behind the vessel, i.e. out of the observer’s sight, when they reached the target depth. Bottles had a ... sight behind waves or in congregations of seabirds before the target depth was reached. No TDRs were ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 179–187 : Author(s): Wienecke, B. and G. Robertson