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The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species
Abstract: Managing fisheries to achieve ecosystem objectives is in its infancy. A general ... approach for maintaining ecological relationships and providing for the recovery of depleted populations in ... taking the ecosystem approach in managing fisheries: (i) how might fisheries impact incidentally on an ... account of uncertainties in knowledge of the structure of ecosystems. Estimates of production arising ...
Meeting Document : WG-EMM-12/P04 : Autor(es): A.J. Constable
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Biology and harvesting of Dissostichus eleginoides around the Kerguelen Islands (Division 58.5.1)
species in the fisheries of the Southern Ocean. In Division 58.5.1, a directed trawl fishery has been in ... operation since 1984/85 and has expanded in the deep western sector of the Kerguelen Shelf. This fishery ... biological information on population dynamics, as well as demographic structures and trends observed in an ... is becoming an increasingly important species in the fisheries of the Southern Ocean. In Division ... 58.5.1, a directed trawl fishery has been in operation since 1984/85 and has expanded in the deep ... well as demographic structures and trends observed in an abundance index, is provided. Prospects for ... . REFERENCES CHECHUN,1.S. 1984. Feeding and food interrelationships of some sub-antarctic fishes in the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 85–106 : Autor(es): Duhamel, G.
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Age determination of Notothenia gibberifrons from the South Shetland Islands, Antarctic Peninsula subarea (Subarea 48.1)
- 14.8-38 cm). Otolith and scale readings have been compared in 19 Potter Cove specimens. In some cases ... scale readings gave a result of one year more. This could arise from the difficulty in differentiating ... between false and annual checks in scales. Age determination by otolith cross sections proved to be the ... those in the same age group around South Georgia. Likewise, our values are lower than the ones reported ... compared in 19 Potter Cove specimens. In some cases scale readings gave a result of one year more. This ... could arise from the difficulty in differentiating between false and annual checks in scales. Age ... from the Antarctic Peninsula Subarea are smaller than those in the same age group around South ... Otoliths/Scales/Bones Exchange System established by CCAMLR will help to eliminate discrepancies in age ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 143-160 : Autor(es): Barrera-Oro, E.
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Summary of holdings of Patagonian toothfish (Dissostichus eleginoides) otoliths and size-at-age estimates from Heard and McDonald Islands (Division 58.5.2)
Abstract: Scientific observers aboard vessels in the Australian fisheries in 58.5.2 have ... collected Dissostichus eleginoides otoliths since the fishery commenced in the 1996/97 season. This program ... has yielded data which has assisted with understanding age structure and growth rates of toothfish in ... 21000 otoliths have been collected from toothfish in 58.5.2, and more than 2500 otolith pairs have been ...
Meeting Document : WG-FSA-07/45 : Autor(es): D.C. Welsford and G.B. Nowara (Australia)
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Report on attendance at the Third Meeting of the Committee for Environmental Protection Under the Madrid Protocol
Abstract: This report outlines the participation of the SC-CAMLR Chair in the Third Meeting of ... debris, especially in relation to compliance with Protocol Annex IV; (b) SC-CAMLR should consider the ... designation of Specially Protected Species in respect of its own needs and in relation to available IUCN ... criteria; (c) CCAMLR's consideration of l\-larine Protected Areas should be carried forward and in ...
Meeting Document : SC-CAMLR-XIX/BG/17 : Autor(es): Chair of the CCAMLR Scientific Committee
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Light levels experienced by foraging Antarctic fur seals, Arctocephalus gazella
(Arctocephalus gazella) at Bird Island, South Georgia (54° 00' S 38° 02' W) in the 1994/5 austral ... to minimum starlight (10-6 lux) at night and during deep daytime dives. The change in il1uminance ... with depth did not follow a simple exponential decrease as recorded in clear oceanic waters. TDRs ... recorded strong light attenuation in the top 50 m of the water column. The mean attenuation coefficient was ...
Meeting Document : WG-EMM-99/28 : Autor(es): D.J. McCafferty, I.L. Boyd and T.R. Walker (UnitedKingdom)
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PHYSICAL CONTROLS ON CORAL COMMUNITIES ON THE GEORGE V LAND SLOPE: SOME WORKING HYPOTHESES
been identified as a Vulnerable Marine Ecosystem in the Antarctic. The challenge is now to understand ... slope in depths of 570 – 950 m. Based on these results we propose some working hypotheses to explain ... their distribution. Icebergs scour to 500 m in this region and the lack of such disturbance is probably ... a factor allowing growth of rich benthic ecosystems. In addition, the richest communities are found ...
Meeting Document : WS-VME-09/04 : Autor(es): De Santis, L., Riddle, M.J., Beaman, R.J., Post, A.L., O’Brien, P.E.
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ADDING CATCH AT AGE AND SURVEY DATA TO THE 48.3 TOOTHFISH CASAL ASSESSMENT
Abstract: The catch-at-age based CASAL model for toothfish in Subarea 48.3, which was presented ... in 2007, is developed and extended here to include survey data. Additional adjustments to the model ... but in the past some cohorts have been missed by the survey. Fits to the survey CPUE are generally not ... retardation period and rate of tag loss. When these factors are included in the model the fits to the tag ...
Meeting Document : WG-SAM-09/13 : Autor(es): D.J. Agnew and M. Belchier (United Kingdom)
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Dietary segregation of krill-eating South Georgia seabirds
period in 1986. For five species, Antarctic krill Euphausia superba was the main food (39-98% by mass ... , was different between all seabird species, reflecting some combination of differences in foraging ... ranges. selectivity by predators, or differences in escape responses of krill. For the krill-eating ... success and information on diet in 5-10 other years suggest that in 1986 seabird diet and reproductive ...
Meeting Document : WG-EMM-97/15 : Autor(es): Prince, P.A., Croxall, J.P., Reid, K.
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Informative approaches to ageing Antarctic fishes
considered in terms of the passage of time (chronological age), and it can also be examined as ' ... ;physiological time'. In this regard otoliths and post-mitotic tissues may contain a large amount of ... biological and ecological information about a fish's age and past life history. In otoliths this ... correlated and that species differences in shape exist. Regression analyses of otolith dimensions may make it ...
Meeting Document : CCAMLR/86/FA/07 : Autor(es): R.L. Radtke and K.T. Hill (USA)