Search results
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Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends
, reaching down to the middle of the codend side walls. The codend bottom was deprived of its selective ... properties up to the middle of side walls by placing inside it, the same fine-meshed inset. In this way ... was the badly chosen mesh size, which had lost selectivity ability for this species, and the double-layer ... constructions used most frequently by commercial fisheries of various countries. That is why they were ... with various codends Abstract / Description: Selectivity properties of single and doubler-layer twine ... codends (mesh size 120 mm) and single-layer tape codends with a mesh size of 60 and 100 mm were determined ... used in fishing for them requires further research. It should first of all cover twine codends with a ... mesh size of 80 mm, currently used on factory trawlers, as well as codends with a structure resembling ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Author(s): Zaucha, J.
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Report of the 1st and the 2nd stage of research fishing conducted by Russian Federation in SSRU 882A in 2010–2012 (this is a revision of WG-SAM-12/08)
Abstract: In accordance with decision of CCAMLR Scientific Committee in 2010 and in 2011 years ... of approximately 280 tons (at 10% operating level) each year without negative effect to the population of toothfish ... In accordance with decision of CCAMLR Scientific Committee in 2010 and in 2011 years Russian ... the removal of approximately 280 tons (at 10% operating level) each year without negative effect ...
Meeting Document : WG-FSA-12/15 : Author(s): E.F. Kulish and I.I. Gordeev (Russia)
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Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines
aimed at providing two indirect methods of assessment of depredated biomass over an 11-year period (2003 ... of depredated biomass over an 11-year period (2003 to 2013), accounting for spatial variations of depredation ... i j k l di j k l d i j k l d B c c E c =å å (1) where Bi,j,k,l (cd) is the amount of fish biomass cap ... ® as follows: ( ) ( ) ( ) , , , , , , , , , CPUE i j k l di ... hooks in each cell (amount ranges from 724 to 10 538 individuals). CPUE methodCPUE method G re na di ... er m et ho d G re na di er m et ho d a = 0.89 R2 = 0.90 a = 0.97 R2 = 0.96 (j) (l) 11 ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Author(s): Gasco, N., P. Tixier, G. Duhamel and C. Guinet
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e-sc-xxxvi-a06.pdf
... .................................................. 224 Development of a five-year work plan for the CCAMLR Scientific Committee ..... 225 Advice ... in 2016 for the work of WG-EMM this year (as outlined in SC-CAMLR- XXXV, Table 1) were: • approaches ... occurred later and with fewer vessels in Subarea 48.1 than in previous seasons, and the trigger level ... for a longer period than in recent years with a contingent delay in the movement of fishing operations ... by subarea and month in the 2016/17 season indicated that fishing occurred later and with fewer ... recent years with a contingent delay in the movement of fishing operations to Subarea 48.1. This ... physical variables with no clear relationships. Comparison of the data for the recent three years with the ... , with krill or fish assuming the dominant proportion in most years. Despite mixed diets, reproductive
application/pdf attached to:WG-EMM-17Meeting Report : WG-EMM-17
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THE SELECTION OF TRIPS BASED ON DATA METRICS FOR THE ASSESSMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA
) in the Ross Sea Region was selected on the basis of data quality metrics for individual trips. Initial ... informative datasets were selected comprising trips with high (above median) rates of recovery of previously ... released tags, and/or where tags released on the trip were subsequently recaptured at a high rate ... . These trips were used to define a range for various data quality metrics considered to be informative ...
Meeting Document : WG-FSA-09/35 : Author(s): D.A.J. Middleton (New Zealand)
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Seabird interactions with longlining operations for Dissostichus eleginoides at the South Sandwich Islands and South Georgia
setting, hook vulnerability, CCAMLR INTRODUCTION In recent years, decreases in populations of several ... at the end of the two sets which overlapped with the early dawn light. No birds were hooked during setting ... it Observations of Longlining reached the winch. Blood was later observed off South Georgia from a wound ... cost in lost time, equipment or fishing efficiency should not be under-estimated, however, and may ... Paper Title: Seabird interactions with longlining operations for Dissostichus eleginoides at the ... South Sandwich Islands, actual and potential interactions with seabirds were assessed. Bird numbers ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 143–153 : Author(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno
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Factors to consider in developing management measures for krill
from year to year. The various techniques used to estimate the abundance of animal populations also ... from year to year. Yet either strategy has to achieve the same conservation objectives. In general ... in catch from year to year cannot all be fully achieved simultaneously. For example, steady catches ... degree of fluctuation in the harvest from year to year. 3.5 Time Frame for Implementation A further ... Living Resources is given along with an outline of steps for the evolution of management procedures for ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Author(s): de la Mare, W.K.
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A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
ζy’ factors also dis- tributed as N(0, 2Rσ ), where σR = 0.5. Naturally, the value selected for σR ... catch landed early sel The longline selectivity function of the earlier years (1997–2002 ... of IUU fishing, particularly in their early stages. The CCAMLR Working Group on Fish Stock Assessment ... ). Even when possible recruitment fluctua- tions in years before any (legal or IUU) harvesting commenced ... catches made. An MP with control parameter values specified is proposed for implementation based on the ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Author(s): Brandão, A. and D.S. Butterworth
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Revised research plan for the exploratory fisheries for Dissostichus spp. in Division 58.4.1 in 2014/15
catch limit, we propose to continue the current research operation for at least 3 years with the same ... propose to continue the current research operation for at least 3 years with the same sample size ...
Meeting Document : WG-FSA-14/18 : Author(s): Delegation of Japan
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Research plan for the exploratory longline fishery for Dissostichus spp. in 2016/17 in Division 58.4.3a by France and Japan
the coming years in order to contribute to the tagging program and to achieve a robust stock assessment ... their intention to continue their exploratory fisheries in Division 58.4.3a over the coming years in order ...
Meeting Document : WG-FSA-16/55 : Author(s): Delegation of France and Japan