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1. A hybrid approach to acoustic classification and length estimation of krill

   the acoustic estimates of species and sizes to net samples collected during three surveys conducted in ... animal measurement. For small school- ing organisms, such as euphausiids, this criterion is seldom met ... estimated confi dently in the interval (amin – amax) where 100|δ| < 20%, for a given dΔ. The mean length ... (Table 1). The limits of each size class can be established by a per- centage error < 20% in the radius ... of species and sizes to net samples collected during three surveys conducted in the Ross Sea under ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Autor(es): Azzali, M., I. Leonori and G. Lanciani

2. An overview of Southern Ocean zooplankton data: abundance, biomass, feeding and functional relationships (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   for differences in the extent of identification of early larval stages. Likewise, the time of year ... between the Antarctic sectors, but latitudinally it is maximal in the Polar Frontal Zone and declines to ... in size structure and abundance. Other issues are specific to polar environments, for example, lipid ... in global literature compilations. Likewise, stenothermy (narrow temperature tolerance) means that ... one-half of those above. A change in the view of SO copepods in the last 20 years has followed an ... salps in some subregions in some years (Conover and Huntley, 1991; Voronina, 1998; Pakhomov et al ... dense salp concentrations in some years. These ‘salp blooms’ have the potential to remove a large ... ; Pakhomov et al., 2011). A series of ‘salp years’ has been described in recent decades (e.g. Chiba et al ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 171–218 : Autor(es): A. Atkinson, P. Ward, B.P.V. Hunt, E.A. Pakhomov and G.W. Hosie

3. Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994

   -seven line sets were observed and 98 deaths of seabirds were recorded over 20 sets; no deaths occurred ... ) predominating. Grey-headed albatrosses, whose populations (at South Georgia are in serious decline, were ... disproportionately affected in relation to their numbers near the fishing vessel; giant petrels may be ... disproportionately affected in relation to the size of their breeding population at South Georgia when compared to ... each species in the vicinity of the ship was recorded every 30 minutes. Of the 20 sets for which ... Georgia (sets 5 to 15) during night-time setting. These occurred in aggregations of 20 to 30 birds ... albatrosses could save the lives of 30 300 albatrosses and enable fishermen to save $4.9 million in bait ... , flying in and diving at the line within 30 m of the stern. Birds were submerged for up to five seconds ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Autor(es): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

4. Analysis of haul data from the South Georgia krill fishery

   :  Data from individual hauls carried out by vessels operating in the South Georgia krill fishery between ... focused, operating in a limited area along the shelf edge on the northern coast of the island. Each day ... several hauls were undertaken by each vessel (average 7.9 in 1993,9.9 in 1995, and 7.0 in 1996), with ... existed between years, with 1995 being a better season than either 1994 or 1996. Aspects of mesoscale ... operating in different years. Most vessels from Poland and Ukraine operated for just a single year, while ... starting in April (1 year), May (5 years) or June (1 year), and ending in August (1 year), September (2 ... years), October (1 year), November (1 year) or December (1 year). In recent years the end date of the ... fourth in 1995 and 1996. In some years vessels from the same nation arrived at South Georgia at ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Autor(es): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes

5. Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill

   proportional recruitment of krill. In this study, krill sampling data for empirical size frequencies were ... . The annual proportions of krill less than 36 mm in length to the total captured in net samples in four ... proportional recruitment in the CCAMLR study areas was similar to the variability in other krill studies and in ... the annual size distributions of krill in penguin diets. Simulations with either no fishing, or with ... years and CCAMLR criteria calculated both for any given year in all years, and for only the final year ... added recruitment CVs for different years on the same scale, and helped account for differences in ... absolute sample sizes in different years and areas. Using either standardised proportions or absolute ... all years of the recruitment vector in a single trial. Four values of gamma were modelled: no catch ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Autor(es): Kinzey, D., G. Watters and C.S. Reiss

6. The effects of monitoring procedures on Adélie penguins

   loss. There was a slight reduction in return rates of birds banded for more than one season, but no ... incubation period resulted in increased foraging trip durations and reduced breeding success. Attachment for ... single or multiple foraging trips post-hatching caused no significant increase in foraging trip durations ... . No reduction in fledging rates of chicks from nests of stomach-lavaged birds was detected over two ... (TIRISTM, Texas Instruments, USA), 30 mm long and 3 mm in diameter, implanted under the skin of the neck ... rearing in the four years from 1989/90 to 1992/93 using the water-offloading method of Wilson (1984 ... in total of these tagged fledglings over the next four years. Such an overall rate of survivorship ... trips of up to 30 km in range are to foraging grounds over the continental shelf. Birds return from ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 155–164 : Autor(es): Clarke, J. and K. Kerry

7. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

   CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... fluctuations together with preliminary information on adult survival and breeding success patterns for certain ... krill predator species. A 'one-way' interaction model is developed, in which krill abundance ... that variability in the annual recruitment of krill results in predator populations being less ... respectively as follow: years in which both adult survival and breeding success are high, those B / [ ~ A ... value (K) - see the solid curve in Figure 1. If p is the proportion of years in which adult survival ... a,K in this same proportion p of the years when there is no krill fishing. Similarly, the krill ... biomass drops below the level @,K in a proportion q of the years, where q is the proportion of years in ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Autor(es): Butterworth, D.S. and R.B. Thomson

8. Some principles for fisheries regulation from an ecosystem perspective

   / Description:  The paper discusses some principles to be considered in the formulation of a framework for the ... Marine Living Resources. An important task in this formulation is to derive subsidiary objectives for ... out in the Convention. An important property required for subsidiary objectives is that they are ... framed in terms of quantities which can be robustly estimated, thus allowing the degree to which ... by experiment could be of the order of hundreds of years (de la Mare, 1986a). In practice, it is ... principles to be considered in the formulation of a framework for the. regulation of fisheries from an ... important task in this formulation is to derive subsidiary objectives for regulation which have a more ... rigorous scientific interpretation than the broad principles of conservation set out in the Convention ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Autor(es): de la Mare, W.K.

9. Species identification and age estimation for the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   toothfish fishery in the Ross Sea dependency in 2002 were identified by observers and returned to New ... in the Ross Sea (CCAMLR Subarea 88.1). The zones are assumed to form annually as this ageing ... , living to at least 50 years. Females grow at a faster rate, and reach a larger size, than males, but both ... be from 12 to 14 years. File:  03marriott-etal.pdf ... 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 40 45 50 55 60 Age (years) To ta l l en gt h ... moderate lifespan (i.e. a maximum age in excess of 15 years), and a few species are slow growing and very ... parameters (Table 3). However, the lack of fi sh aged younger than 9 years has resulted in unrealistic ... years for females. DISCUSSION In 2002 observers had diffi culty identifying the macrourids of the ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 37–51 : Autor(es): Marriott, P., P.L. Horn and P. McMillan

10. Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea

    georgiana in the Ross Sea suggested that these skates initially grow very rapidly for about five years ... been generated that suggest much slower growth, greater ages-at-maturity (about 20 years compared with ... and growth in A. georgiana that is radically different from the published interpretation is presented ... . By counting fine growth bands in the caudal thorns instead of broad diffuse bands, growth curves have ... (years) 0 10 20 30 40 R ea de r 1 , r ea di ng 2 (y ea rs ) ( m ea n ± 2S E ) 0 10 20 ... about 48 cm in 10 years and 66–69 cm in 20 years (Figure 3). Thereafter, reader 2’s growth curve ... , longevity in A. georgiana is probably at least 30 years, and possibly greater than 40 years. Using ... estimated to occur at about 20 years in this species, albeit with a potentially wide variation: 67 cm PL ...

    Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Autor(es): Francis, M.P. and M.J. Gallagher

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