Search results
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A simulation study of krill fishing by an individual Japanese trawler
Abstract: A model is set up for the operation (which includes both searching and fishing) of a ... Japanese krill trawler over a half-month period, and the output is compared to statistics from a sample of ... data from the commercial fishery. Twenty-four candidate "CPUE" biomass indices are considered ... , and their performance investigated in response to six different ways in which the overall krill ...
Meeting Document : SC-CAMLR-VI/BG/38 : Author(s): D.S. Butterworth (United Kingdom)
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Coastal weather drives foraging behaviour of chinstrap penguins, Pygoscelis antarctica
to the season where no such downwelling was detected, suggesting that changes in climate-driven ... indicators because their performance is presumed to be linked to the overall function of the ecosystem that ... supports them. In the southwest Atlantic sector of the Southern Ocean, Antarctic krill (Euphausia superba ... the ecosystem in an adaptive framework for sustainably managing krill catch levels, performance ...
Meeting Document : WG-EMM-18/P14 : Author(s): A.D. Lowther, P. Trathan, A. Tarroux, C. Lydersen and K.M. Kovacs
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
while at shallower layer (20-50 m) at night. In the offshore foraging areas krill showed no diurnal ... . 2-3 km in horizontal distance) of higher densities (≥250g/m2). In the inshore foraging areas krill ... showed a diurnal vertical migration, tending to be at deeper depth range (50-100 m deep) in the day time ... vertical migration, staying close to the surface throughout the day. As for body size and maturity of krill ...
Meeting Document : WG-KRILL-92/27 : Author(s): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)
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Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill
the annual size distributions of krill in penguin diets. Simulations with either no fishing, or with ... projections and the CCAMLR decision rules for Antarctic krill Abstract / Description: The generalised yield ... model (GYM) was used by CCAMLR to establish the precautionary catch limit for the Antarctic krill ... (Euphausia superba) fishery. The current precautionary catch limit was based on supplying the GYM with a ... studies and in the annual size distributions of krill in penguin diets. Simulations with either no ... all years of the recruitment vector in a single trial. Four values of gamma were modelled: no catch ... Island recruitment proportions with no additional CV on the recruitment vector and natural mortality ... from all four regions were all above the CCAMLR depletion decision rule at no catch, at the trigger ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Author(s): Kinzey, D., G. Watters and C.S. Reiss
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Seabird avoidance measures for small Alaskan longline vessels
, the current requirement for small vessels using fixed gear of a single streamer line with no mandatory ... Abstract: Given the lack of information on appropriate seabird avoidance measures for small ... Alaskan longline vessels, we determined the “2-m access window”, or the distance astern that longline ... (> 26 to 55 feet) using two gear types: snap-on gear and fixed gear. We also determined the ...
Meeting Document : WG-FSA-05/36 : Author(s): E.F. Melvin and M. Wainstein (USA)
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INGESTION OF FISHING GEAR AND ENTANGLEMENTS OF SEABIRDS: IMPLICATIONS FOR MONITORING AND MANAGEMENT
of a 16 year dataset collected at Bird Island indicated that the amount of gear found in association ... -headed albatross was from squid and not longline fisheries, and mistaken for natural prey rather than the ... higher in giant petrels and wandering albatross than black-browed albatross, and no grey-headed albatross ... was affected. The index of wandering albatross gear abundance showed two peaks, the most recent ...
Meeting Document : WG-IMAF-09/10 : Author(s): R.A. Phillips, C. Ridley, N. Harrison (United Kindom), K. Reid (Secretariat), G.N. Tuck (Australia) and P.J.A. Pugh (United Kingdom)
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Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history
but significant increase through the period when samples were collected (l972/73–1988/89). There were ... ) and increased with age at death. Changes in the growth pattern of teeth suggested that fur seals which ... compared with the expected layer depth based on a linear relationship between layer depth and age at which ... each layer was deposited. There was significant variation in the depth of tooth growth layers deposited ...
Meeting Document : WG-CEMP-93/11 : Author(s): I.L. Boyd and J.P. Roberts (United Kingdom)
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WG-SAM-09
documents Doc Number Title WG-SAM-09/01 Agenda for the Working Group on Statistics, Assessments and ... THE EXPLORATORY FISHERIES FOR DISSOSTICHUS SPP. IN SUBAREAS 48.6 AND 58.4 IN 2008/09 Secretariat WG ... -SAM-09/07 OTOLITH-BASED AGEING OF THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD ... SAMPLING VARIATION AND RANDOM READER ERROR INTO CALCULATION OF EFFECTIVE SAMPLE SIZE IN THE APPLICATION OF ...
Meeting
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
level of escapement. The generalised yield model uses an unbiased estimate of SB0 and, thus, requires no ... krill yields according to decision rules that relate spawning stock status to the median unexploited ... spawning biomass, SB0. The first model has been developed specifically for krill, the krill yield model ... , while the second is a generalised yield model. The decision rules relate to the effects of a specified ...
Meeting Document : WG-EMM-97/45 : Author(s): de la Mare, W.K., Constable, A.J.
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e-cc-xviii-a4.pdf
... body approved by the Commission’s auditor, indicating a strong capacity to pay. CCAMLR SITE ... (i) Publications (ii) Scientific Committee Budget 7. Investment Policy 8. CCAMLR Site on the World Wide Web ... noted from the audit report of the 1998 Financial Statements that there were no cases of non-compliance ... the more specific recommendations no longer completely appropriate, the Secretariat had identified ... implications of decisions made at its current meeting. SCAF noted that no changes to the 2000 budget would be ... Commission was no longer appropriate for the conditions currently prevailing in Australia. On the basis of
application/pdf attached to:SCAF-99Meeting Report : SCAF-99