Search results
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Collection, processing and potential use of sonar data from krill fishing vessels
Sea', routinely use sonars, and we provide example data and swarm descriptions from these vessels ...
Meeting Document : SG-ASAM-14/01 : Author(s): G. Skaret (Norway) and M.J. Cox (Australia)
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Preliminary assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (Division 58.4.3b), based on the analysis of fine-scale catch and effort data
assessing these stocks. At its meeting in July 2007, WG-SAM agreed that fine-scale analysis of catch and ... effort would be a useful way of progressing an assessment of BANZARE fishery (WG-SAM 2007, paragraphs 3.1 ... submitted by scientific observers aboard vessels in the BANZARE fishery. Data were too few, or with ... between historical catch rates and catch compositions and those reported in the 2006/07 season, with ...
Meeting Document : WG-FSA-07/44 : Author(s): J.P. McKinlay, D.C. Welsford, A.J. Constable and G.B. Nowara (Australia)
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Selectivity of standard polish commercial trawl codends on Antarctic fishing grounds
difficult matter will be preparing a codend with proper selectivity properties for South Georgia icefish ... Abstract: steelon codends used in commercial fishery, with a nominal mesh size A = 80 mm and A ... = 100 mm, made of double twines with a thickness of 4.2 mm. The studies covered 6 major fish species. 1 ... . It appears from the study that Antarctic icefish and bumphead notothenia are subject to selection ...
Meeting Document : SC-CAMLR-VII/BG/11 : Author(s): J. Zaucha (Poland)
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Revised research plan for the Spanish exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2: Fundamentals and procedures (this is a revision of WG-SAM-12/13)
are proposed, a depletion experiment together with the tag of some specimens using the DeLury model ... achieving the objectives three study areas with high historical effort have been selected in different SSRUs ... with four different scenarios related to the extent of the area. The regression coefficients between ... the CPUE and the cumulative catch seem to be a practical way to stablish the area (10 nautical miles ...
Meeting Document : WG-FSA-12/69 : Author(s): R. Sarralde, L.J López Abellán and S. Barreiro (Spain)
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LENGTH AND AGE AT SPAWNING OF ANTARCTIC TOOTHFISH DISSOSTICHUS MAWSONI IN THE ROSS SEA
that primary endogenous growth can occur for an extended period with oocytes accumulating at the ... fishing seasons. The female spawning ogive incorporates the proportion of sexually mature fish that do not ... slope region is estimated to be 16.6 yr (range 16.0–17.3) or 133.2 cm (range 130.9–135.7) by length ... slope with the age distribution in the northern area and the lack of evidence for skip spawning in the ...
Meeting Document : WG-FSA-09/37 : Author(s): S.J. Parker and P.J. Grimes (New Zealand)
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Research plan for the 2016/17 exploratory longline fishery of Dissostichus spp. in Subarea 48.6 by South Africa and Japan
distribution of sizes, GSI and Fulton’s condition factors for D. mawsoni in Subarea 48.6 suggest that northward ... spawning migration and southward feeding migration as Ross Sea stock. Life history seems to be related to ... that larvae are driven further eastward. We cannot identify an appropriate stock unit currently. The ... addition, we considered that only recaptures for 1 year at liberty is effective to estimate the ...
Meeting Document : WG-SAM-16/07 : Author(s): Delegations of Japan and South Africa
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Foraging interactions of wandering albatrosses Diomedea exulans breeding on Marion Island with longline fisheries in the southern Indian Ocean
Wandering Albatrosses breeding on Marion Island in order to assess the scale of interactions with known long ... island, in warmer waters, and showed high spatial overlap with areas of intense tuna Thunnus spp. long ... overlap with the local Patagonian toothfish Dissostichus eleginoides long-line fishery. Tracks of birds ... returning with offal from the toothfish fishery, showed a strong association with positions at which ...
Meeting Document : WG-FSA-01/10 : Author(s): D.C. Nel, P.G. Ryan, J.L. Nel, N.T.W. Klages (South Africa), R.P. Wilson (Germany) and G. Robertson (Australia)
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An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort
rate increases. This research suggests that it would be possible to calculate a precautionary ... this new method are similar to those of the Agnew and Kirkwood (2005) method, and this suggests that ... the current method is adequate under circumstances of low evasion and when good knowledge exists that ... the current method suffer from the fact that the observation method used directly affects the system ...
Meeting Document : WG-FSA-05/P7 : Author(s): Ball, I.
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Temporal scales of foraging in a marine predator: implications for interpreting the distribution of prey
must be able to adapt quickly to changes in the spatial patterning of prey. Antarctic fur seals feed ... primarily on krill, which is patchily distributed. When combined with information about swimming speed on ... showed that fur seals foraged at two spatial distributions: (1) a fine-scale (median distance 0.18- 0.27 ... travel durations between bouts of feeding changed between years. These changes suggested either that the ...
Meeting Document : WG-EMM-95/23 : Author(s): Boyd, I.L.
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Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at South Shetland Islands
gained while at sea. However, protein loss expressed in absolute terms or as a proportion of that present ... the breeding group, assuming a diet composed of 75% cephalopods and 25% fish, was estimated at 521 t ... and 174 t respectively for the period examined. Author(s): A.R. Carlini, G.A. Daneri, M.E.I. Márquez ...
Meeting Document : WG-EMM-04/33 : Author(s): A.R. Carlini, G.A. Daneri, M.E.I. Márquez (Argentina), H. Bornemann (Germany), H. Panarello, R. Casaux (Argentina), S. Ramdohr and J. Plötz (Germany)