Search results
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Possible effects of different levels of krill fishing on predators – some initial modelling attempts
level drops, the ratio of good to poor years for krill predators will decrease. The aim of subsequent ... of exploitation is indicated by K. The juvenile (first year) 'survival rate' incorporates the effects ... of (changing) pregnancy rate as well as the higher-than-average natural mortality rate early in life ... . These relationships are: 'bad' for each predator, to be interpreted respectively as follow: years in which both ... fluctuations together with preliminary information on adult survival and breeding success patterns for certain ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson
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Using compact video camera technology for rapid deep-sea benthic habitat assessment
Antarctic Division (AAD) for deployment on commercial fishing gear to observe interactions with the Southern ... umbilical. 3. Simple to operate: No requirement for opening the pressure housing to download data leads to ...
Meeting Document : WG-EMM-10/24 : Author(s): G.P. Ewing, R. Kilpatrick, A.J. Constable and D.C. Welsford (Australia)
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Ecosystem studies carried out during the second Ukrainian Marine Antarctic Expedition in Subareas 48.2 and 48.1 in 1998
of the Antarctic. It was arranged by the Ukrainian Antarctic Center of the Ministry for Affairs of Science ... cold), recruitment of the stock (for the first time for recent years), low abundance of krill larvae ... . It was arranged by the Ukrainian Antarctic Center of the Ministry for Affairs of Science and Technologies ... cold), recruitment of the stock (for the first time for recent years), low abundance of krill larvae ...
Meeting Document : WG-EMM-00/5 : Author(s): V. Bibik and P. Gozhik (Ukraine)
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Seabird by-catch in the Patagonian toothfish longline fishery at the Prince Edward Islands: 1998–1999
bycatch during the year July 1998-June 1999. Data on seabird bycatch were obtained from fishery observers ... aboard all 11 sanctioned fishing trips, representing a fishing effort of 5.1 million hooks. This is 19 ... birds per 1000 hooks, compared with 0.289 in 1996-97 and 0.117 in 1997-98. Comparisons between years ... for the same vessel, using the same gear design and at the same time of year, show marked decreases in seabird ...
Meeting Document : WG-FSA-99/42 Rev. 1 : Author(s): P.G. Ryan and B.P. Watkins (South Africa)
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Fishery Report: Exploratory fishery for Dissostichus spp. in Subarea 48.6
one vessel per country was permitted to fish at any one time (Conservation Measure 41-04 ... the Year-of-the-Skate (CCAMLR-XXVII, paragraph 4.55): (i) all skates should be brought on board ... measures 20. Conservation Measure 25-02 applies to this fishery and in recent years has been linked ... . Element Limit in force Advice for 2009/10 Access No more than one vessel per country at any one time ...
Document : Site Section: Publications
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Interannual variability of the South Georgia marine ecosystem: biological and physical sources of variation in the abundance of krill
. There is now extensive evidence that there are years when there is a very low abundance of Antarctic krill ... in year class success in parts, or all, of the population across the Scotia Sea, can generate large ... . There is now extensive evidence that there are years when there is a very low abundance of Antarctic krill ... in year class success in parts, or all, of the population across the Scotia Sea, can generate large ...
Meeting Document : WS-AREA 48-98/8 : Author(s): E.J. Murphy, J.L. Watkins, K. Reid, P.N. Trathan, I. Everson, J.P. Croxall, J. Priddle, M.A. Brandon, A.S. Brierley (UK) and E. Hofman (USA)
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A two-fleet ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
become available for the years 2004 and 2005. The assessment is also generalised to allow for a second ... predation and its consequences are also investigated. Twenty year biomass projections under the assumption ... become available for the years 2004 and 2005. The assessment is also generalised to allow for a second ... predation and its consequences are also investigated. Twenty year biomass projections under the assumption ...
Meeting Document : WG-FSA-05/58 : Author(s): A. Brandão and D.S. Butterworth (South Africa)
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Deployment of research hauls in the exploratory fisheries for Dissostichus spp. in Subareas 48.6 and 58.4 in 2010/11
58.4.3a in 2010/11. The positions were allocated in accordance with Conservation Measure 41-01 and the ... provided with three random lots of starting positions for research hauls in each SSRU. These random lots ... , Koryo Maru No. 11, Shinsei Maru No.3 and Tronio) conducted research fishing in the exploratory fisheries ...
Meeting Document : WG-SAM-11/04 : Author(s): Secretariat
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A review of by-catch in CCAMLR exploratory toothfish fisheries
years, despite no significant reduction in fishing effort probably linked to changes in landings ... of skates. Bycatch by weight formed 6.7% of total catch per year, however the number of individuals landed ... of individuals across years, despite no significant reduction in fishing effort probably linked to changes ... in landings of skates. Bycatch by weight formed 6.7% of total catch per year, however the number ...
Meeting Document : WG-FSA-14/16 : Author(s): E. McClure, K. Reid (Secretariat)
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Estimation of the fishery–krill–predator overlap
in the level of overlap in recent years (1995-98) than estimated with either the catch in the CPD or the Agnew ... 1990. The RPO and Schroeder index indicated a greater increase in the level of overlap in recent years ...
Meeting Document : WG-EMM-99/11 : Author(s): Secretariat