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1. Depth distribution and spawning pattern of Dissostichus eleginoides at South Georgia

   Abstract / Description:  Trends in mean length and maturity stage of Patagonian toothfish (Dissostichus ... in addition to a major spawning event in late July/August, there may be a small spawning event in ... London SW7 2QA, United Kingdom Abstract Trends in mean length and maturity stage of Patagonian ... maturity data suggests that in addition to a major spawning event in late July/August, there may be a ... small spawning event in April/May. Detailed examination of maturity-at-depth data suggests that mature ... islands. In all areas fish increase i n s ize w i t h d e p t h (South Georg ia : Zh ivov a n d ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 19–36 : Autor(es): Agnew, D.J., L. Heaps, C. Jones, A. Watson, K. Berkieta and J. Pearce

2. Feeding patterns of nine species of Antarctic fish and assessment of their daily food consumption

   fish species in Antarctic waters. The aim of this study is to collect information on the feeding ... patterns of several commercially non-targeted species in the Indian Ocean sector of the Southern Ocean ... station was carried out in the Kosmonavtov Sea (67°50'S; 41°24'E) in March 1988. All samples ... average amount of consumption for the waters of eastern Antarctica, which has a mean biomass density in ... * * Abstract Little is known about the feeding patterns of non-commercial fish species in Antarctic waters ... -targetted species in the Indian Ocean sector of the Southern Ocean: Nototheniidae (four species ... composition of these species to find out their daily diet. One 36-hour station was carried out in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 321–333 : Autor(es): Pakhomov, Y.A. and V.B. Tseitlin

3. Factors that may influence the accuracy of abundance estimates from CCAMLR tag-recapture programs for Dissostichus spp. and best practice for addressing bias

   programs. The methods that have been used in CCAMLR tag-recapture programs to mitigate such biases, or to ... account for their effects in stock assessments for Dissostichus spp. are also summarised. In nearly all ... are hooked on gear that is subsequently lost, or that are caught in IUU gear, may result in ... estimates of population size. In the CCAMLR area, tagging programs have existed in some fisheries for ... vessels commenced in the fishery at Heard Island and the McDonald Islands (Division 58.5.2) in 1998 ... (Williams et al., 2002) and at South Georgia (Subareas 48.3) and in the Ross Sea (Subarea 88.1) in 2000 ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 63–72 : Autor(es): Welsford, D.C. and P.E. Ziegler

4. Australian research on Antarctic bird and seal diets

   data on the diets of important vertebrate predator species in Prydz Bay and around the sub-Antarctic ... results are collated and summarised, and several important points emerge. In Prydz Bay, on which is ... Pleuragramma antarcticum are important in most diets, and many predators can switch between prey species. The ... Davis Station (68°30'S:77°50'E), in the south-eastern corner of the Prydz Bay Priority Area of CEMP ... species in Prydz Bay and around the sub-Antarctic Heard and Macquarie Islands have been collected during ... important points emerge. In Prydz Bay, on which is centered the CCAMLR Ecosystem Monitoring Programme's ... predators. Euphausia crystallorophias and the fish Pleuragramma antarcticum are important in most diets ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 231-249 : Autor(es): Williams, R.

5. Spawning locations of mackerel icefish at South Georgia

   . There are also indications of a possible second spawning season in January, although the evidence is ... weak. Concentrations of larval icefish within Cumberland Bay are an order of magnitude higher than in ... Rocks. There are also indications of a possible second spawning season in January, although the ... than in adjacent coastal waters and their density declines exponentially offshore. All this evidence ... , spawning, South Georgia, CCAMLR INTRODUCTION Over the past 30 years there has been a fishery, large in ... some seasons, for mackerel icefish (Chanipsoccplznlzls giinnari) in CCAMLR Subarea 48.3 at South ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 107–118 : Autor(es): Everson, I., A.W. North, A. Paul, R. Cooper, N.C. McWilliam and K.-H. Kock

6. Acoustic estimates of krill density at South Georgia, 1981 to 1998

   separate density estimates for northeastern and northwestern South Georgia, and in four of these seasons ... calculate separate density estimates for northeastern and northwestern South Georgia, and in four of these ... (see Priddle et al., 1988). Since Interannual variability in the abundance of t ha t t ime there ... reports of large year-to-year fluctuations in krill has been apparent since the 1920s and 1930s when ... abundance in the vicinity of South Georgia, based shore-based whaling took place from the island on both ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Autor(es): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson

7. Status of krill target strength

   aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... should not be affected by a frequent cause of bias in single-animal measurements, namely thresholding ... , 1972; MacLennan, 1990) has been applied to krill (Euphausia superba) in the Southern Ocean (Miller and ... Hampton, 1989). In order to convert measurements of echo strength to biological quantities, such as the ... 102 ! :/ interest in krill biomass, as witnessed, for example, by the scale of international ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Autor(es): Foote, K.G., D. Chu and T.K. Stanton

8. Using ecosystem monitoring data to detect impacts

   an observed value in an unimpacted system, or (ii) the frequency of values below a fixed reference ... point. The second approach allows inference criteria based on changes in this frequency rather than by ... decline in Antarctic fur seal (Arctocephalus gazella) pup production at South Georgia from the early 1990s ... sites. These methods assess either (i) the expected probability of an observed value in an unimpacted ... inference criteria based on changes in this frequency rather than by reference to a critical probability ... . All methods would have provided a sustained indication of a significant decline in Antarctic fur seal ... management of fish- eries in the Southern Ocean and follows a set of principles that recognise the need to ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Autor(es): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda

9. Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone

   / Description:  In many of CCAMLR’s new and exploratory fisheries, stock assessment techniques are still in ... development. The failure of the tag-recapture program to provide robust assessments in many areas and doubts ... and fishing mortality from length-frequency data alone. In this paper, a number of length-based stock ... assessment methods are revisited and some limitations in their ability to draw robust inferences about stock ... (Dissostichus eleginoides) and Antarctic toothfish (D. mawsoni) in the Convention Area, a research plan, a ... abundance estimates. Tag- recapture data have been considered poor in many instances due to general ... problems with low tagging rates, insufficient overlap in the geographical loca- tion and the length ... Email – philippe.ziegler@aad.gov.au Abstract In many of CCAMLR’s new and exploratory fisheries, stock ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Autor(es): Ziegler, P.E., D.C. Welsford and A.J. Constable

10. 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 ... of species and sizes to net samples collected during three surveys conducted in the Ross Sea under ... . 34 Introduction In the Ross Sea, two similar krill species play a fundamental role in the pelagic ... - bution of each population in the Ross Sea. In principle, the abundance of the two populations can be ... popu- lation is knowable by frequent net sampling, visual analysis of echograms, and in situ target ...

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

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