Search results
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Using the EPOC modelling framework to assess management procedures for Antarctic krill in Statistical Area 48: evaluating spatial differences in productivity of Antarctic krill
ameliorate any local fluctuations in krill abundance and (iii) fishery behaviour could be constrained by ... conservation objectives for predators could be affected by those changes. Productivity of krill can be impacted ... by sea temperature and available production. Similarly, survivorship and successful recruitment of ...
Meeting Document : WG-EMM-06/38 Rev. 1 : Author(s): A.J. Constable (Australia)
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Variation in echosounder calibration with temperature and some possible implications for acoustic surveys of krill biomass
Abstract: Accurate estimation of krill biomass by acoustic techniques is dependant upon a number ... differences in gain settings, then integrated 120 kHz echo signals would be under-reported by 2.8 dB, leading ... in turn to an under-estimation of krill biomass by 52.5 %. Every effort should therefore be made to ...
Meeting Document : WG-EMM-97/52 : Author(s): Watkins, J.L., Woodroffe, P., Brierley, A.S., Goss, C.
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Swimming speed and allocation of time during the dive cycle of Antarctic fur seals
than was exhibited by animals when swimming at the surface. Swimming speeds were fastest during the ... duration and was influenced by diving swimming speed. This relationship was, on average, close to that ... predicted by a model (Houston & Carbone, Behav. Ecol., 3, 255-265) which suggested that the metabolic ...
Meeting Document : WG-EMM-95/25 : Author(s): Bevan, R.M., Boyd, I.L., Reid, K.
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Diving pattern and performance in nonbreeding gentoo penguins (Pygoscelis papua) during winter
were followed by surface intervals two to three times dive duration. Deep dives showed clear diel ... in Gentoo Penguins is changed by varying the frequency and duration of foraging trips, rather than by ...
Meeting Document : WG-CEMP-92/37 : Author(s): T.D. Williams (United Kingdom), A. Kato (Japan), J.P. Croxall (United Kingdom), Y. Naito (Japan), D.R. Briggs, S. Rodwell and T.R. Barton (United Kingdom)
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Progress towards a trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery
(mainly respiration) exceeding primary production by 7%. However, individual groups are generally not ... predators (especially Weddell seal, type-C killer whale, sperm whale) cannot be tested reliably by the ... or planned by New Zealand scientists in the Ross Sea, are given. Author(s): M. Pinkerton, S. Hanchet ...
Meeting Document : WG-EMM-06/14 : Author(s): M. Pinkerton, S. Hanchet and J. Bradford-Grieve (New Zealand)
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Developing integrated assessments for Dissostichus eleginoides based on the CCAMLR precautionary approach
first is the integrated assessment, undertaken external to the GYM by software such as CASAL. The second ... the precautionary approach used by WG-FSA. It is recommended that this approach be implemented for use ... by WG-FSA at its next meeting. Author(s): I. Ball and A.J. Constable (Australia) Title: Developing ...
Meeting Document : WG-FSA-SAM-05/16 : Author(s): I. Ball and A.J. Constable (Australia)
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An interlaboratory comparison of ages estimated for Dissostichus eleginoides from the Argentine Sea, southwest Atlantic Ocean
124 fishes caughts in Argentine Sea (South West Atlantic) Ages were estimated by readers from National ... Atlantic, the waters south of New Zealand, and CCAMLR subarea 48.3. The comparisons of age data produced by ... R1 and R3, and between scales and otoliths by R1 and R3. Clearly, there are differences between these ...
Meeting Document : WG-FSA-04/45 : Author(s): M.C. Cassia (Argentina), P.L. Horn (New Zealand) and J.R. Ashford (USA)
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Preliminary assessment of Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003
. This initial comparison was somewhat confounded by the depth of the grounds fished by the trawl and ... for a more comprehensive comparison, and to sample greater depths that fished by the long line ...
Meeting Document : WG-FSA-03/33 : Author(s): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)
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The Generalised Yield Model version 5: structure, specifications and examples for validation
the Krill Yield Model, which was based on the method for evaluating yield developed by Beddington & ... catches set by a proportion of an estimate of pre-exploitation biomass (as in krill), a specified catch in ... alternative functions. Finally, some examples are presented to show how the GYM can be validated by the user ...
Meeting Document : WG-FSA-SAM 03/14 : Author(s): A. Constable (Australia)
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Bird Island, South Georgia during the 1998 winter and 1998/99 pup-rearing season
records started. Two animals (15 %) were entangled in polypropylene straps, down by 50 % on the 1997 ... %) was down by half on the previous summer and represents the lowest adult total recorded. The proportion ... highest total of 1988/89. Overall occurrence of entanglement in summer and winter is still down by 80-90 ...
Meeting Document : SC-CAMLR-XVIII/BG/05 : Author(s): Delegation of the United Kingdom