Search results
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Laboratory target strength measurements of free swimming Antarctic krill (Euphausia superba)
Abstract: Target strength measurements of free swimming krill at 120kHz were made using a single ... beam monostatic system in a 10 m3 laboratory tank. Krill (grouped according to length classes) swam ... freely in the tank triggering the data acquisition system when generating a back scattered signal larger ... than a threshold, determined by the system noise level. Dorsal and ventral target strength estimates ...
Meeting Document : WG-EMM-97/75 : Author(s): Pauly, T., Penrose, J.D.
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On the status of mesopelagic fish (myctophidae) in the Southern Ocean ecosystem
relationships of myctophids demonstrate that this group of mesopelagic fish plays a significant role in the ... - they are zooplankton-eaters who consume a considerable amount of meso and macroplankton which ... determines their high abundance and biomass. Thus, according to a preliminary estimate the yearly consumption ... occupy the third trophic level and are consumers of the second order. Myctophids play a major role as ...
Meeting Document : WG-FSA-93/17 : Author(s): A.N. Kozlov (Russia)
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Follow up to the Joint CEP/SC-CAMLR Workshop on Climate Change and Monitoring
Abstract: The Joint CEP/SC-CAMLR Workshop on Climate Change and Monitoring was a timely and ... useful exercise that produced a number of recommendations with relevance to CCAMLR XXXV, SC-CAMLR XXXV ... a climate change response work programme and a list of key scientific questions for SC-CAMLR; o ... -related work to the CEP; o including climate change in working group discussions; o developing a ...
Meeting Document : CCAMLR-XXXV/BG/24 : Author(s): Submitted by ASOC
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Krill faecal pellets drive hidden pulses of particulate organic carbon in the marginal ice zone
Abstract: The biological carbon pump drives a flux of particulate organic carbon (POC) through ... behaviour could result in a major conduit of carbon to depth through their rapid exploitation of ... phytoplankton blooms and bulk egestion of rapidly sinking faecal pellets (FPs). Our model results suggest a ... ): A. Belcher, S.A. Henson, C. Manno, S.L. Hill, A. Atkinson, S.E. Thorpe, P. Fretwell, L. Ireland and ...
Meeting Document : WG-EMM-2019/P01 : Author(s): A. Belcher, S.A. Henson, C. Manno, S.L. Hill, A. Atkinson, S.E. Thorpe, P. Fretwell, L. Ireland and G.A. Tarling
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Predicting changes in the Antarctic krill Euphausia superba population at South Georgia
abundance are essentially unknown. A conceptual model, developed froll1 quantitative measures of krill ... with model predictions, in 1998 there was a serial change in krill population structure, low krill ... December to 42 mm in March was apparently a result of the transport of krill into the region. This is the ... physical and biological processes, predators have a potential key role as indicators of Southern Ocean ...
Meeting Document : WG-EMM-99/37 : Author(s): K. Reid, K.E. Barlow, J.P. Croxall and R.I. Taylor (UnitedKingdom)
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Pup production and distribution of breeding Antarctic fur seals (Arctocephalus gazella) at South Georgia
Abstract: A census of the breeding population of Antarctic fur seals (Arctocephalus gazella) at ... at the breeding grounds during the pupping period, together with corrections for the likelihood of a ... female being ashore at a census and for pregnancy rate (71 % in 1990/91), pup production was estimated as ... long-term study sites probably because of a short term reduction in food availability. Data from these ...
Meeting Document : WG-CEMP-92/39 : Author(s): I.L. Boyd (United Kingdom)
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Using compact video camera technology for rapid deep-sea benthic habitat assessment
Abstract: A compact, autonomous deep sea video system designed and constructed by the Australian ... Ocean benthos, has a wider application in deep-sea marine research. The use of the system as a drop ... camera for broad-scale and rapid deep-sea benthic habitat assessment, during a recent AAD marine science ... a drop camera included: 1. Rapid: Three, two minute replicates of footage at 1000m, including ...
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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Review of fishery monitoring and forecast procedures
areas where catch limits apply. Each season, approximately 130 catch limits are monitored and a linear ... catch limits, and as such overruns are a part of the management process used by CCAMLR. Where the ... assumption about the operation of the fishery is violated, there is a higher risk that the linear prediction ... will be inaccurate. A range of management options are considered in response to a catch overrun. The ...
Meeting Document : WG-SAM-13/06 : Author(s): Secretariat
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Method for rapidly assessing spatial scale of interactions of fishing gear with habitats and Antarctic marine living resources
consideration. Here, we present (i) a method for automating these requirements irrespective of the data layers ... process for determining boundaries of independent patches of each class of an ecological feature, (iii) a ... procedure for assessing interactions of fishing within cells of a patch, (iv) aggregate measures of ... interactions with classes of ecological features within reporting areas, and (v) a plotting method to support ...
Meeting Document : WG-FSA-15/62 Rev. 1 : Author(s): A. Constable, M. Sumner, J. Melbourne-Thomas and D. Welsford (Australia)
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Population status of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica, based on photo-identification studies
Abstract: We studied Ross Sea killer whales (RSKWs; Orcinus orca, Antarctic type C), a fish ... -eating ecotype, in McMurdo Sound, Antarctica, during 7 seasons, over a 14-year period from 2001/02 to ... 175 there annually. Despite high turnover of different whales between years, we used a Bayesian mark ... -recapture approach to identify a seasonal ‘resident’ population with an average annual abundance of 55 ...
Meeting Document : WG-EMM-16/50 : Author(s): R. Pitman, H. Fearnbach and J.W. Durban