Search results
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Comparison of age readings by two otolith preparation techniques and readers
Abstract: During the 2012 CCAMLR toothfish ageing workshop, otoliths from 31 Antarctic toothfish ... ” techniques were used to prepare otoliths and each were read by an experienced reader from each program. The ... and in interpretation of the break and burn preparation method to warrant further coordination and ... . This experiment highlights the importance of monitoring and comparing ageing protocols within and ...
Meeting Document : WG-FSA-14/53 : Author(s): S.J. Parker (New Zealand), A.F. Petrov (Russia), C.P. Sutton (New Zealand) and E.N. Kuznetsova (Russia)
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Method for rapidly assessing spatial scale of interactions of fishing gear with habitats and Antarctic marine living resources
Abstract: In 2014, the Scientific Committee noted that it needed to develop advice routinely on ... the potential impacts on dependent and related species for proposed exploratory fisheries and ... requested working groups consider how to report on these issues, which also form part of the review ... consideration. Here, we present (i) a method for automating these requirements irrespective of the data layers ...
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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Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)
offspring provisioning, the most energetically costly component of seabird parental care, adults need to ... contend with large interannual fluctuations in prey availability and hence the cost of chick provisioning ... somewhere along the continuum between maintaining constant investment in foraging effort between years and ... penguins and land-based observations at the breeding colony, we examined how foraging and reproductive ...
Meeting Document : WG-EMM-06/P6 : Author(s): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)
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Preliminary assessment of mackerel icefish, Champsocephalus gunnari, in Subarea 48.3 using a length based population dynamics modelv
Abstract: A length-based projection model is used to estimate catch limits for the 2011/12 ... fishing season for Champsocephalus gunnari in CCAMLR sub area 48.3. The model is initialised using ... estimated numbers at length derived from survey length density and biomass density data, removing the need ... of the harvest control rule ensuring 75% escapement after a two year projection period yielded a ...
Meeting Document : WG-FSA-11/30 Rev. 1 : Author(s): R.E. Mitchell and S.M. Martin (United Kingdom)
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USING AUTOMATED CAMERAS AS A COST-EFFECTIVE MEANS OF EXTENDING LAND-BASED PREDATOR MONITORING
and reliable tools for surveillance and monitoring. This paper describes (1) the kinds of observations ... developed for use in the extreme conditions of Antarctica, (2) a preliminary assessment of the utility of ... expand the spatial extent of Adélie penguin monitoring, and to extend monitoring to additional land-based ...
Meeting Document : WG-EMM-11/37 : Author(s): C. Southwell, L. Emmerson and K. Newbery (Australia)
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SKATE DIET AT SOUTH GEORGIA INDICATES BENTHIC HABIT OF KRILL
were collected during three groundfish surveys (winter 2007, 2008 and summer 2009) around the island of ... South Georgia, Southern Ocean. The diet of A. georgiana varied with skate size and between years ... , polychaetes and other benthic fauna. The Antarctic skate appears to be an opportunistic predator and the clear ...
Meeting Document : WG-FSA-09/15 : Author(s): C.E. Main and M.A. Collins (United Kingdom)
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Lead-radium dating provides a framework for coordinating age estimation of Patagonian toothfish (Dissostichus eleginoides) between fishing areas
valid ages for juvenile to older adult groups, which were consistent with the counting of otolith growth ... revealed minor biases between the radiometric age and interpretation of growth zone counting for regional ... fishing areas monitored by two facilities, Center for Quantitative Fisheries Ecology (CQFE) and the ... . 3.3 years was observed across estimated ages younger than 20 years. For the CAF, ages were ...
Meeting Document : WG-FSA-11/P01 : Author(s): A.H. Andrews, J.R. Ashford, C.M. Brooks, K. Krusic-Golub, G. Duhamel, M. Belchier, C.C. Lundstrom and G.M. Cailliet
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New data on depths inhabited by striped-eyed rock cod Lepidonotothen kempi (Norman) (Nototheniidae) off Bouvet Island
Abstract: In 2010 on the southern slope of Bouvet Island, I found L. kempi at still greater depth ... in the course of fishery for toothfish onboard of 1 Insung Korean longliner. In the first case ... Antarctic toothfish caught at depths of 1500–1900 m. In the second case at 54°32′7 S and 03°46′8 W, three ...
Meeting Document : WG-FSA-11/P02 : Author(s): A.F. Petrov
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Fecundity and egg size of Lithodid crabs from CCAMLR Subarea 48.3
Abstract: The fecundity and egg size of three species of lithodid crab caught in CCAMLR Subarea ... significantly between species. The highest relative fecundity and smallest egg size was found in Paralomis ... spinosissima which is found in shallower waters, whereas the lowest relative fecundity values and largest eggs ... were recorded in the deeper living species, Neolithodes diomedeae. In all species fecundity was ...
Meeting Document : WG-FSA-02/27 : Author(s): S.A. Morley, M. Belchier, J.D. Dickson and T.M. Mulvey (United Kingdom)
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Acoustic estimates of krill density at South Georgia during 11 austral summers between 1981 and 1998
are presented for eleven austral summers between 1981 and 1998. Krill abundance at the island ... fluctuated widely from year to year over this time, ranging from?2 to?150 gm-2 (wet weight). The 1982, 199 1 ... of the summers between 1990 and 1998 it was possible to calculate separate density estimates for ... north-eastern and north-western ends of South Georgia. In four of these years density was higher to the ...
Meeting Document : WG-EMM-98/51 : Author(s): A.S. Brierley, J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson (UK)