Resultados de la búsqueda
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An approach to feedback management (FBM) of the krill fishery based on routine acoustic data collection and intermittent land-based predator studies
alternative approach for decades, but still lacks a plan that can be made operational within realistic cost ... and effort levels. Our proposal outlines that acoustic data would be collected, processed and ... can be integrated with finer-scale knowledge of top predator feeding strategies and updated through ... . As the trigger level lacks any form of relationship with the actual stock condition this approach is ...
Meeting Document : SC-CAMLR-XXXVI/BG/20 : Autor(es): Delegations of Norway, China and Chile
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Estimates of abundance of Dissostichus eleginoides and Champsocephalus gunnari from the random stratified trawl survey in the waters surrounding Heard Island in Division 58.5.2 for 2019
average. Invertebrate catch (including jellyfish) in the 2019 survey was lower than that of 2018, with ... ) around Heard Island and McDonald Islands (HIMI) was conducted in CCAMLR Division 58.5.2, with the ... design and the duration of the hauls were similar to recent surveys, but with a new set of randomly ... of the survey. The catch of Dissostichus eleginoides (Patagonian toothfish) was 30.5 t which, while ...
Meeting Document : WG-FSA-2019/03 : Autor(es): G.B. Nowara, T.D. Lamb and P. Ziegler
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PROPOSAL TO VARY THE REQUIREMENT TO TEST SINK RATES FOR INTEGRATED WEIGHT LONGLINE (IWL) GEAR PRIOR TO ENTERING THE CONVENTION AREA
Abstract: This paper proposes that, for fishers whose vessels comply with certain conditions, the ... conditions to be satisfied include that the vessel used IWL gear in the immediate previous season that fully ... complied with the required sink rate and that there have been no changes since then to the IWL, other ... (IWL) before entering the Convention Area is an impost on fishers that is no longer warranted. Testing ...
Meeting Document : WG-FSA-08/36 : Autor(es): I. Hay (Australia)
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Distribution, morphology, growth, reproduction, diet and trophic position of two species of grenadier (Macrourus whitsoni and M. caml) in the Ross Sea region of the Southern Ocean (CCAMLR Subareas 88.1 and 88.2)
scale, Macrourus whitsoni and M. caml seem to be almost completely sympatric by depth and area, with ... either species. Gonad staging data imply that the spawning period of both species may be extended ... of the two species of 94% overall. We found that total length (TL) was no less precise a measurement ... both appearing to be abundant between depths of 900 and 1900 m. There was a small but significant ...
Meeting Document : WG-FSA-12/54 Rev. 1 : Autor(es): M.H. Pinkerton, P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown (New Zealand)
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Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area
2001/02 year class lasted four months. This was estimated based on a retrospective count of daily ... relationship found between fish length and daily otolith increments could be used for age differentiation of ... ; Lisovenko, 1982; Frolkina, 1989, 1999, 2001, 2002) has demonstrated that fi sh with gonads at stages II ... (1980, 1982, 1985) reported the values to be 13.5 and 19.2 cm respectively; and Frolkina (1989, 2001 ... ) reported the mean length of a yearling to be 9–11 cm and that of 2-year-old fi sh to be 17–19 cm. For ... appeared that hatching occurred in September–October 2000 and in June–October 2001 (Figure 4). Therefore ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Autor(es): Shcherbich, L.V
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Management and uncertainty: the example of South Georgia
(including the effects of doing nothing) could provide a procedure for providing advice that could cope with ... : Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... uncertainty is unlikely to be avoided even though further research should reduce its degree. It seems useful ... . From an examination of Articles IX 2(f) and XV 2(e, d) of the CCAMLR Convention it follows that a ... exploitation, perhaps F=0.05, could be sustained with a recruitment around that of the 1970's i.e. around 5 ... exploitation (e.g. F=O.l) coul4 be sustained, and that this could be consistent with a higher recruitment ... pattern of mortalities that are more consistent with apparent changes of fishing effort. It must be ... often made with some degree of uncertainty in scientific advice. Such uncertainty is unlikely to be ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Autor(es): Gulland, J.A.
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The applicability of international conservation instruments to the establishment of marine protected areas in Antarctica
that have relevance to marine protected area (MPA) development provide for action to be taken globally ... with global work to develop high seas protected areas should be undertaken to achieve the goal of a ... , depending on their specific provisions, full application in Antarctic waters may be difficult, inappropriate ... concluded that although direct application of other international conservation agreements is in most cases ...
Meeting Document : WG-EMM-04/32 : Autor(es): S. Grant (United Kingdom)
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Introducing Casal2 for toothfish stock assessments
constructed. Casal2 models can be used for a single population with a single anthropogenic event (i.e., a ... github website. We also suggest that one or multiple assessments of toothfish be included in the Casal2 ... model that allows more flexibility in specifying the population dynamics, parameter estimation, and ... model outputs than CASAL. Models are built with user-defined categories such as area, sex and maturity ...
Meeting Document : WG-SAM-18/14 : Autor(es): S. Mormede
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ANALYSIS OF VARIABILITY OF KRILL SIZE AND FISH BY-CATCH IN JAPANESE KRILL FISHERY BASED ON SCIENTIFIC OBSERVER DATA
formula with the variance terms derived from the Bayesian model. For both krill length and bycatch fish ... CV. The results of this study suggest that scientific data collectionby commercial fishery is an ... rising cost of observer program. Author(s): T. Okuda and M. Kiyota (Japan) Title: ANALYSIS OF ...
Meeting Document : WG-EMM-11/39 : Autor(es): T. Okuda and M. Kiyota (Japan)
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Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using the Japanese fishery data
vertical migration of Antarctic krill (Euphausia superba) associated with the brightness categories of the ... smaller around at daytime during summer in SS and SO. Daily average trawling depth tended to be shallower ... middle autumn and winter in each brightness category. Author(s): K. Taki, T. Hayashi and M. Naganobu ...
Meeting Document : WG-EMM-04/44 : Autor(es): K. Taki, T. Hayashi and M. Naganobu (Japan)