Search results
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Rossii revisited: new information on the early history of the fishery for Notothenia rossii in Subarea 48.3
assessments, based on the incomplete data set, had indicated a 1970 biomass of 600 000 tonnes and an ... to be expected from a new fishery. However, on the basis of historical reports and analyses of stock ... histories, it is suggested that 50% of the catch of 400 000 tonnes reported from 1970 was Champsocephalus ... gunnari, rather than N. rossii, and that 25% of the catch in 1969 was also C. gunnari. A VPA run with ...
Meeting Document : WG-FSA-95/17 : Author(s): Agnew, D.J.
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Mapping trends in activity of illegal, unreported and unregulated (IUU) fishing in the CAMLR Convention Area
to provide an overview of the potential spatial and temporal distribution of recent IUU activity in ... is concentrated in the Indian Ocean Sector; however, the spatial and temporal pattern of IUU activity ... indicates the presence of IUU activity in Subarea 48.6 and more persistent activity in the Indian Ocean ... Sector on Ob, Lena, Elan and BANZARE banks as well as on the boundary of the Kerguelen and Heard Island ...
Meeting Document : CCAMLR-XXXII/BG/09 Rev. 1 : Author(s): Secretariat
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Interannual variation in the summer diet of Adélie penguin (Pygoscelis adeliae) at Edmonson Point
Abstract: Diet sampling of Adélie penguins (Pygoscelis adeliae) was carried out at two colonies ... , in the Ross Sea, Antarctica, to study the feeding ecology of this species for the Commission for the ... Conservation of Antarctic Marine Living Resources (CCAMLR) Ecosystem Monitoring Program. The study took place ... composition of diet varied between locations: mean weight of food and krill content were generally higher at ...
Meeting Document : WG-EMM-04/38 : Author(s): S. Olmastroni, F. Pezzo, I. Bisogno and S. Focardi (Italy)
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Age, growth and size at sexual maturity of Macrourus carinatus from the CCAMLR fisheries in division 58.5.2
Abstract: Estimates of age and growth were determined from 156 Macrourus carinatus otolith ... 1993. The estimated range of ages was 4 – 25 years. von Bertalanffy growth parameters were calculated ... for both sexes combined, resulting in values of: L8 = 635 mm, K = 0.088 and t0 =-1.8. The size at ... sexual maturity of M. carinatus was determined from 162 specimens collected during commercial fishing ...
Meeting Document : WG-FSA-02/48 : Author(s): E.M. van Wijk, R. Williams and A.J. Constable (Australia)
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Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997
index of condition which uses the ratio of the measured total mass to the estimated mass is show to ... provide a good indicator of local krill density. The index is likely to be little affected by the ... changes in hill density and therefore can provide indications of short term variations in krill ... availability. Condition index provides a useful proxy for krill density that is likely to be of considerable ...
Meeting Document : WG-EMM-00/44 : Author(s): I. Everson (United Kingdom) and K.-H. Kock (Germany)
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Distribution of salps near the South Shetland Islands during austral summer, 1990/1991 with special reference to krill distribution
Abstract: Distribution and biomass of salps and Antarctic krill (Euphausia superba) were ... was lower than that of E. superba. Two species of salps; Salpa thompsoni and Ihlea racovitzai were ... found, and the former was dominant numerically. Spatial distribution and generation composition of these ... two species was different. Spatial distributions of salps and E. superba did not overlap particularly ...
Meeting Document : WG-EMM-95/54 : Author(s): Terazaki, M., Ichii, T., Kawaguchi, K., Nishikawa, J., Ishii, H., Naganobu, M.
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Preliminary aspects of a simulation model to be used for evaluating the experimental crab fishery
Abstract: At the 1993 meeting of the Working Group on Fish Stock Assessment, members requested ... that work be undertaken to evaluate certain aspects of the experimental management strategy for the ... rate data from the 1991/92 crab fishery are used to motivate the construction of an ontogenetic ... fishery simulation is spatially explicit, and the dynamics of crab abundance are described on a daily ...
Meeting Document : WG-FSA-94/26 : Author(s): G. Watters (USA)
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Estimating the level of illegal fishing using simulated scaling methods on detected activity
, Annex 5, paragraph 3.18). The results of these simulations suggest that more information on IUU fleet ... the number of IUU fishing days, particularly for areas where patrolling may be relatively infrequent ... vessels between detecting IUU activity, thereby estimating the number of IUU fishing days, and deterring ... such activity. For assessment purposes, this highlights a general problem that the method of ...
Meeting Document : WG-FSA-SAM-04/14 : Author(s): Ball, I.
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Preliminary assessment of genetic diversity in bycatch-caught darkbelly skate (Bathyraja meridionalis) from South Georgia
Abstract: Reliable species identification and population assessments of skates are crucial for ... the sustainable management of their vulnerable stocks. However, species identification is a major ... molecular tools to identify specimens of softnose skates (Bathyraja spp.) caught as bycatch from the ... discrepancy between previous genetic studies of B. meridionalis and B. maccaini that challenged the ...
Meeting Document : WG-FSA-2019/19 : Author(s): S. Pérez-Espona, W.P. Goodall-Copestake, P. Hollyman and M. Belchier
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Behaviour of Dissostichus eleginoides fitted with archival tags at Heard Island: preliminary results
Abstract: Thirty nine Dissostichus eleginoides were released in the vicinity of Heard Island ... data they recorded is analysed here. Most of the fish had periods of active vertical movement ... alternating with periods of relative inactivity, loosely correlated with moon phase. The direction of vertical ... bottom of a valley only moving upwards from their resting depth, while those on the intervening ...
Meeting Document : WG-FSA-02/60 : Author(s): R. Williams and T. Lamb (Australia)