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1. Management and assessment options for the crab fishery around South Georgia

   / Description:  A new fishery for the lithodid crab, Paralomis spinosissima, started in Subarea 48.3 in 1992 ... . The fishery is also new to CCAMLR, both in terms of the species and fishing gear. We provide an ... overview of the management options for crab fisheries in general and then consider these options in the ... in addition to the 'size-sex-season' controls. Implementation of both sets of controls ... together with the requirements of Article I1 of the CCAMLR Convention. The objectives in sub-paragraph 3 ... Article I1 of the CCAMLR Convention. In the final section, we consider the assessment methodologies and ... of Article I1 may be paraphrased as follows: (i) to prevent a decrease in the abundance of the ... objectives set out in Article I1 of the Convention (see 'The CCAMLR Convention') and could enhance the ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Autor(es): Basson, M. and D.D. Hoggarth

2. Chilean krill fishery: analysis of the 1991 season

   data and its use in studying small-scale spatial distribution of catches. The results show that krill ... fishing in Subarea 48.1 is particularly intense near CEMP sites. Other ways of using of haul-by-haul data ... fishery from 1987 to 1991. Data is presented by split-years and shown under the calendar year in which ... feeding krill and gravid females are avoided by the fishery. In producing frozen kriH, the whole animal ... Hauls In 1991, fishing took place in the northern shelf of the South Shetlands. The season started 20 ... trawling depth was between 44 and 60 m. Our data together with the data presented in Endo and Ichii ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Autor(es): Marín, V.H., A. Mujica and P. Eberhard

3. Archival and satellite-linked data recorders

   provides an overview of currently-available data recorders for use in research on marine animals. These ... recorders are deployed on freely swimming animals and gather data on aspects of an animal’'s diving ... behaviour. The records can be recovered in one of two ways: the data recorder must either be recovered ... animal of interest and subsequently recovered together with the stored data, and Satellite-linked ... animal in the tropics. It is not known if such a system can be employed in the Antarctic where sunrise ... seal hauled out on a beach or ice-floe, but makes geolocation of any animal in the water difficult ... of interrupted transmissions is increased. This may make such transmissions from an animal in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 475-493 : Autor(es): Hill, R.D.

4. Antarctic krill and ecosystem management – from Seattle to Siena

   (2002 – this volume), with the three papers documenting developments during CCAMLR’s first 20 years of ... to be consistent with the objectives of the CAMLR Convention, particularly its Article II. Emphasis ... approach developed in order to calculate a precautionary catch limit for the krill fishery in various ... the three papers documenting developments during CCAMLR’s fi rst 20 years of existence. Résumé Il ... stocks in the Southern Ocean as a whole (Kock, 1992). The latter raised serious concerns about the ... ). Together, both decision rules were designed to act in concert, as well as conservatively, to ensure that ... recruitment to the next season’s ice. Consecutive years of heavy sea-ice cover therefore act in concert to ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 175–212 : Autor(es): Miller, D.G.M

5. Target strengths of Antarctic krill (Euphausia superba)

   and 120 kHz in a sheltered bay at South Georgia. The results indicate that the Target Strength values ... ). Both echosounder and integrator were housed ashore, in the laboratory, together with other equipment ... echosounder was used in its dual 38 and 120 kHz modes together with UNIVERSAL SONAR transducers, each with ... over a 42-hour period. In another case, Event number 20, the number increased by two specimens ... krill together is denoted TScage+N krill in Table 1. Regression of the corresponding backscattering ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Autor(es): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote

6. Status of krill target strength

   aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... on both animal size and transmit frequency, notwithstanding admitted shortcomings. Some recent single ... -animal measurements of target strength for live euphausiids and euphausiid-related species, made under ... effects discussed earlier in this article and differences in animal type), the structure exhibited in the ... should not be affected by a frequent cause of bias in single-animal measurements, namely thresholding ... interference between the echoes from each animal. In order to describe the scattering involving the ... number density were performed at 30 and 20 kHz. Measurements at 30 kHz were performed near Bouvet Island ...

   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

7. 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 ... Reference year 2000 First year of projection 2001 Years to project stock in simulation 60 y Reference ... (1991) who found that biases may occur even when the population was in equilibrium. Fur- ther ... migration. It represented age classes from 0 to 50 years, with the last age class being a ‘plus class’ in ... projection period of 60 years starting arbitrarily in 2000. These catch levels were chosen to provide ...

   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

8. Seabird interactions with longlining operations for Dissostichus eleginoides at the South Sandwich Islands and South Georgia

   mortality was seen and only one bird was caught on a hook; nevertheless many species in these aggregations ... of birds are clearly potentially vulnerable to setting operations in daylight hours. Several species ... grey-headed albatrosses, whose populations are in serious decline at South Georgia, were rare; their ... vulnerability to longlining operations in the South Sandwich Islands may, therefore, be low. Quantitative data ... INTRODUCTION In recent years, decreases in populations of several species of Southern Ocean albatrosses ... saving of $A4.9 million and 30 300 albatrosses annually. The Japanese tuna fishery is in the process ... but were 10 mm in diameter. Pieces of the squid Illex argentinus were used for bait, with roughly 20 ... thank all those people in Chile and the United Kingdom who assisted in the planning and execution of ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 143–153 : Autor(es): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

9. Editorial

   Science coincides with the 30th meeting of the CCAMLR Scientific Committee. Over those 30 years, several ... -based decision-making by CCAMLR. One of the most striking changes over the past 30 years is the increase ... the Southern Ocean. In particular there is a suite of papers that address key aspects of improving ... of analysis of data gathered on fishing vessels to using trends in patents to predict the future for ... decision-making by CCAMLR. One of the most striking changes over the past 30 years is the increase in the ... coincides with the 30th meeting of the CCAMLR Scientific Committee. Over those 30 years, several thousand ... . In particular there is a suite of papers that address key aspects of improving assessment of the ... analysis of data gathered on fishing vessels to using trends in patents to predict the future for krill ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 167 : Autor(es): Editors

10. Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia

    (Champsocephalus gunnari) in Subarea 48.3 employs the CCAMLR mixture analysis program (CMIX) and generalised yield ... accurate identification of age cohorts from the survey data. In this paper a length-based approach is ... data which, in conjunction with the bootstrapped survey biomass data, yields an estimate of the ... showed very good agreement in calculated yields for 2006, 2007 and 2009, and some differences for 2008 ... 20 30 40 50 (b) Hillary et al. 134 In equation (6) the ... τ, there exists a (length) transition matrix Γij, which defines the probability of an animal in ... Length (cm) 10 20 30 40 50 60 Figure 1 ... - aggregated (right). 2009 survey Length (cm) D en si ty 10 20 30 40 50 10 20 30 40 5010 20 30 ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Autor(es): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew

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