Search results
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Determination of a statistically based survey area suitable for hydroacoustic stock assessment of Euphausia superba in the Elephant Island, King George Island, Bransfield Strait area
of data from 1981, 1984 and 1978-1989 permitted resolution of inter-year differences in standing stock ... relatively uniform from year to year. Using only sub-area biomass leads to an ambiguous interpretation ... of the data as to whether high or law standing stock is due to low production (ie. "good" year vs ... . “bad” year) or differential effects of migration. Using the total of both sub-areas the survey area can ...
Meeting Document : SC-CAMLR-VIII/BG/32 : Author(s): Delegation of USA
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Temporal scales of foraging in a marine predator: implications for interpreting the distribution of prey
by short (5 rain) travel durations. In a study lasting 5 years, the distributions of travel durations ... between bouts of feeding changed between years. These changes suggested either that the structure ... and/or the spatial distribution of krill swarms varied between years. The behavior of fur seals suggested ... -scale level. Only in one year of the study (1990/91) were there indications that fur seals had ...
Meeting Document : WG-EMM-95/23 : Author(s): Boyd, I.L.
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Proposal for a CCAMLR-sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
years in Subarea 88.1 and for nine years in Subarea 88.2. The research and assessment work ... locations in different years, making it impossible to develop a consistent time series that would monitor ... The exploratory longline fishery for Dissostichus spp. has now been operating for 14 years ... in Subarea 88.1 and for nine years in Subarea 88.2. The research and assessment work in these areas ...
Meeting Document : SC-CAMLR-XXX/07 : Author(s): Delegation of New Zealand
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Intra-annual variability in the density of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ estimates of krill density
) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ... all three years, was detected. Krill densities in winter were predominantly low (mean = 18.7 ... g m –2, SD = 24.3), but had risen substantially by summer in each year (mean = 89.5 g m –2, SD = 64.2 ... to explore whether high-frequency temporal variation (i.e. within-year) could have led to the perceived ... . Target strength (TS) and krill length-frequency estimation The Demer and Conti (2005) stochastic dis ... by the sampling dis- tance for each day: this is equivalent to the Jolly and Hampton (1990) method ... . Furthermore, the reliability of the WCPs was dis- appointing: both the on-shelf and off-shelf instru- ments ... ) AT SOUTH GEORGIA, 2002–2005: WITHIN-YEAR VARIATION PROVIDES A NEW FRAMEWORK FOR INTERPRETING PREVIOUS ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 27–41 : Author(s): Saunders, R.A., A.S. Brierley, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein and D.G. Bone
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Estimation of natural mortality using catch-at-age and aged mark-recapture data: a simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation
were generated for 12 years of fishing. Two alternative estimation models were programmed in R. Both ... -structured population for each fishing year by annual recursive use of difference equations for population ... numbers at age obtained by integrating a first order ordinary differential equation (ODE) for within-year ... mortality equation (CCODE model) uses an ODE with constant within-year catch per unit time for each age ...
Meeting Document : WG-SAM-10/11 Rev. 1 : Author(s): S.G. Candy (Australia)
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Research currently being undertaken by the Republic of South Africa on "dependent and related species" within the Antarctic marine ecosystem
t:OfflPreh_ensive collectio11,e; of suitable ref1Uel'1t1P. rrr.!!te:r-la!, ,-artic:u!ar-1::,1 the let-5!. di ... ~,e,nch Institut(? of the Universit~ of' Pretoria SP@nd UF' to three mont.h~; each Year in the Antarctic ... !IF./ t,i..~ond the i:(:)ntil'lll!'!'ltjll adh, F'ii!la!51lt -seab,jp,:'lf:; c.an I ive for man!I i,,onlhs far ... functionin9 of eco5~stem5, The continued Possibi I it~ for exPloi- tat l on t"!~ man of renewable natural ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 59-77 : Author(s): South Africa
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Antarctic sea ice losses drive gains in benthic carbon drawdown
as the phytoplankton die and sink to the sea-bed where the carbon is sequestered for thousands of years. This carbon ... Peninsula in the last few years has exposed new open water, allowing large blooms of phytoplankton ... drawdown per year on the West Antarctic continental shelf. Carbon accumulation differs significantly ... in the last few years has exposed new open water, allowing large blooms of phytoplankton to flourish ...
Meeting Document : SC-CAMLR-XXXIV/BG/34 : Author(s): Delegation of the United Kingdom
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Preliminary model of krill fishery behaviour in Subarea 48.1
of closing the zones around Livingston and Elephant Islands in alternate years would result in an average ... of land-based predators in alternate years under this scenario. Author(s): D.J. Agnew (Secretariat) Title ... of closing the zones around Livingston and Elephant Islands in alternate years would result in an average ... of land-based predators in alternate years under this scenario. ...
Meeting Document : WG-KRILL-93/14 : Author(s): D.J. Agnew (Secretariat)
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Anthropogenic feather soiling, marine debris and fishing gear associated with seabirds at Bird Island, South Georgia, 2000/01
and fishing gear associated with seabirds at Bird Island, South Georgia. In this, the eighth year ... . Quantities of fishing gear remained within the levels of previous years for all other species. Marine debris ... , the vast majority of which was plastics, showed a 28% increase from the maximum of the previous year ... for grey-headed albatrosses, but a 24% decrease from the maximum of the previous year for wandering ...
Meeting Document : SC-CAMLR-XX/BG/07 : Author(s): Delegation of the United Kingdom
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CEAMARC, the Collaborative East Antarctic Marine Census for the Census of Antarctic Marine Life (IPY # 53): An overview
countries and 19 vessels. The Collaborative East Antarctic Marine Census (CEAMARC) was a multinational ... of Terre Ade´lie and George V Land of Eastern Antarctica. CEAMARC has provided a robust benchmark ... ship-based research programme in the austral summer of 2007e2008 involving scientists from 30 countries ... and George V Land of Eastern Antarctica. CEAMARC has provided a robust benchmark of the marine life ...
Meeting Document : WS-MPA-11/P01 : Author(s): G. Hosie, P. Koubbi, M. Riddle, C. Ozouf-Costaz, M. Moteki, M. Fukuchi, N. Ameziane, T. Ishimaru, A. Goffart