Search results
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
Abstract: Shipboard tracking study for krill-eating predators (penguins and female fur seals) at ... areas of krill (≥250g/m2) were rather limited. In contrast, fur sea! foraging areas were formed in ... . 2-3 km in horizontal distance) of higher densities (≥250g/m2). In the inshore foraging areas krill ... showed a diurnal vertical migration, tending to be at deeper depth range (50-100 m deep) in the day time ...
Meeting Document : WG-KRILL-92/27 : Author(s): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)
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Assessment models for Patagonian toothfish in research block 58.4.4b_1 (SSRU 58.4.4bC) for the years 1990-2014
at the estimates of OB_1b model, use of knife edge selectivity at fixed 8 year for disease mortality ... tagging data (OB_1b_notag model) and 5) removal of age observations, and fix of both selectivitties at the ... Abstract: We made five sensitive runs of single-sex age-structured CASAL models for stock status ... assessments of Dissostichus eleginoides in the research block 58.4.4b_1 following the recommendation of the WG ...
Meeting Document : WG-SAM-15/25 : Author(s): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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Results from the groundfish survey conducted in CCAMLR Subarea 48.3 in January/February 2011
Abstract: The 2011 groundfish survey took place at South Georgia and Shag Rocks on the FV Sil ... the shelf. Catch-weighted length frequencies of mackerel icefish indicated that 3+ sized fish ... dominated at Shag Rocks, however 1+ and 2+ sized fish were present in larger proportions at South Georgia. A ... mean biomass of 49,353 tonnes was estimated for mackerel icefish, with a lower 1-sided 95% CL of 31,373 ...
Meeting Document : WG-FSA-11/29 : Author(s): J. Brown, S. Gregory, K. Brigden, R. Benedet, O. Hogg, P. Brewin and L. Featherstone (United Kingdom)
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Beach debris survey Signy Island, South Orkney Islands, 1998/99
of debris at sea. Author(s): Delegation of the United Kingdom Title: Beach debris survey Signy ... Abstract: The ninth annual beach debris survey was carried out at Signy Island, South Orkney ... categories. A total of 83 items weighing 12.96 kg was collected. The number of items recovered was the ... highest since 1996/97 and showed an increase of 86% compared to the previous year. The total mass of items ...
Meeting Document : CCAMLR-XVIII/BG/7 : Author(s): Delegation of the United Kingdom
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Revised research plan for the exploratory fisheries for Dissostichus spp. in Division 58.4.3a in 2014/15
and recaptured only at the western end of the block, as pointed out at the last WG-FSA meeting ... Abstract: In this document, we revised stock status assessments of D. eleginoides in research ... blocks 5843a_1 using CPUE analogy method, Petersen method and CASAL model, although the tagging data of ... number of tag recaptures from the estimated stock sizes using the Petersen and CASAL methods was ...
Meeting Document : WG-FSA-14/20 : Author(s): Delegation of Japan
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Reasons of differences between distribution and density of mackerel icefish (Champsocephalus gunnari) aggregations in the South Georgia area during summer and autumn periods in different years from the bottom trawl survey data
the largest aggregations of food organisms are concentrated at the beginning of the spring period ... . Icefish concentrations were detected at the periphery of a cyclonic meander or in the centre of the ... vertical migrations by foraging fish. All physiological processes of icefish begin to recede at such a ... anticyclonic circulation formed by the Weddell waters. Confinement of the fish to the boundary of water masses ...
Meeting Document : WG-FSA-05/77 : Author(s): Zh.A. Frolkina (Russia)
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Maturity stages for skates (Rajiformes)
-laying. Additionally, the current description of females at stage 2 (maturing) in the CCAMLR observer ... a four-stage key that allows for the collection of data for fish that are at active stages of the ... , important elements of the reproductive cycle may go unrecorded, including females in the process of egg ... manual could lead to some confusion between fish at stage 2 and stage 3 (mature). Suggestions for ...
Meeting Document : CCAMLR-XXXIII/03 : Author(s): J. R. Ellis, S.R. McCully Phillips and V. Laptivovsky (United Kingdom)
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Maturity stages for skates (Rajiformes)
-laying. Additionally, the current description of females at stage 2 (maturing) in the CCAMLR observer ... a four-stage key that allows for the collection of data for fish that are at active stages of the ... , important elements of the reproductive cycle may go unrecorded, including females in the process of egg ... manual could lead to some confusion between fish at stage 2 and stage 3 (mature). Suggestions for ...
Meeting Document : WG-FSA-14/33 : Author(s): J.R. Ellis, S.R. McCully Phillips and V. Laptivovsky (United Kingdom)
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Preliminary acoustic results from the New Zealand IPY-CAML survey of the Ross Sea region in February-March 2008
trawls were carried out at randomly selected locations over the shelf as part of the core biodiversity ... highest at 120 kHz), which is characteristic of species without an air-filled swimbladder. Acoustic target ... Ross Sea region in support of the International Polar Year Census of Antarctic Marine Life (IPY-CAML ... ). The 50 day voyage on the research vessel Tangaroa involved an extensive survey of marine organisms ...
Meeting Document : SG-ASAM-09/05 : Author(s): R. O’Driscoll, G. Macaulay, S. Gauthier, M. Pinkerton and S. Hanchet (New Zealand)
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Optimization of the sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins
analysed for the optimal allocation of observations at each level in nested designs. Recommended numbers ... fixed at 0.1 Cost values are those of argentine logistics, and FORTRAN programms, developed for this ... Abstract: Based on preliminary results of prey size in Adélie penguins, sampling designs intended ... for detection of interannual variations in prey mean sizes and penguin size related selectivity are ...
Meeting Document : WG-CEMP-90/09 : Author(s): E. Marschoff and B. Gonzalez (Argentina)