Resultados de la búsqueda
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Surface water circulation in krill fishing areas near the South Shetland Islands
with a drogue attached at a depth of 30 m to assess flow patterns at the depth range where krill tended ... deployed in shelf and oceanic waters to the north of the South Shetland Islands. Each buoy was deployed ... buoy tracks, the surface circulation to the north of the South Shetlands shelf was described as a slow ... sluggish southwest current with a series of small-scale circular and semi-circular flows in the shelf ... at a depth of 30 m to assess flow patterns at the depth range where krill tended to be most abundant ... ; cylindrical type - length 8.6 m, diameter 0.94 m in 1994/95) at a depth of 30 m to assess flow pattern at ... merged into large swarms at 58-59's along 49"W, which happens to be on the route of the oceanic ... . Naganobu National Research Institute of Far Seas Fisheries 5-7-1, Orido, Shimizu, 424 Japan Abstract ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 125–136 : Autor(es): Ichii, T. and M. Naganobu
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Connectivity and population structure in Pleuragramma antarcticum along the west Antarctic Peninsula
populations at 1) the north tip of the Peninsula, and 2) the southern WAP encompassing Charcot Island and ... Marguerite Bay, with no mixing between. The presence of a single length mode at Charcot Island and Marguerite ... connectivity, by testing between rival hypotheses of population segregation and linkage. If independent ... , reduction in sea-ice along the WAP may lead to extinction of local populations through drastic mortality of ...
Meeting Document : WG-FSA-10/16 : Autor(es): J. Ashford, J. Ferguson, A. Piñones, J. Torres and W. Fraser
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LENGTH-BASED ASSESSMENT FOR MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3
the population numbers‐at‐length. A comparison of this method and the existing age‐based CMIX/GYM ... ) in sub‐area 48.3 employs the CMIX and GYM packages, which derives population numbers‐at‐age and ... accurate identification of age cohorts from the survey data. In this paper we describe a length‐based ... approach that removes the problem of cohort determination. A stratified bootstrap technique (consistent ...
Meeting Document : WG-FSA-09/27 : Autor(es): R.M. Hillary (Australia), C.T.T. Edwards, R.E. Mitchel and D.J. Agnew (United Kingdom)
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Precautionary, ecosystem-based management for the Antarctic krill fishery: a work in progress
Abstract: The Antarctic krill fishery is expanding at a time when the Antarctic Peninsula is ... enhance its precautionary management of the krill fishery in line with Convention objectives. This paper ... provides an update on the krill fishery; discusses the consideration of climate change in krill fisheries ... management; and addresses key aspects of krill research, ecosystem-based management, monitoring, bycatch, and ...
Meeting Document : SC-CAMLR-XXXVII/BG/17 : Autor(es): Submitted by ASOC
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Scotia Sea Pygoscelid Penguin Tracking and Habitat Analysis Workshop
development of habitat use models over the coming year with a view to check on progress at the forthcoming 10 ... Abstract: During WG-EMM-14, it was noted that characterisation of overlap between land-breeding ... existing tracking data and developing habitat models that predict foraging habitats as functions of ... environmental variables. Consequently, in May 2015, an expert meeting was convened to consider the utility of ...
Meeting Document : WG-EMM-15/09 : Autor(es): P.N. Trathan (United Kingdom), J.T. Hinke (USA) and B. Lascelles (BirdLife International)
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Potentially commercial invertebrates on Ob Bank: Moroteuthis ingens (Oegopsida) and Paralomis aculeata (Anomura) (Division 58.4.4)
during aimed fishery for Lepidonotothen squamifrons. At maximum, the proportion of squid in the total ... prespawning state. The squid aggregation was apparently composed of mating individuals. At has been concluded ... Abstract: The cephalopods of the Antarctic are supposed to have a very high biomass level However ... , they have not been fished nor any fishable aggregations of them detected to date in the CCAMLR ...
Meeting Document : WG-FSA-96/15 : Autor(es): Pshenichnov, L.K.
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Educational poster on hook ingestion
them. The hooks found in albatross colonies at South Georgia in years prior to 2001/02 were of the type ... Abstract: Since the 2001/2002 season CCAMLR has recognised the importance of the high level of ... used in the regulated fishery in Subarea 48.3 (SC-CAMLRR-XXI/BG/7). In 2007 overwintering scientists at ... Bird Island, South Georgia, have noted an increase in the occurrence of hook injuries to wandering ...
Meeting Document : WG-FSA-07/20 : Autor(es): G. Robertson (Australia)
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Assessment and tag program adaption methods for exploratory fisheries in the CAMLR Convention Area: an example application for Division 58.4.3a
initial stock assessment and adaption of catch limits and tagging rates is presented for new and ... catch-at-length/age data and tagging data at-length/age. A simple algorithm, based upon the Petersen ... tagging levels that will produce an expected abundance estimate in the following year of a given precision ... whilst ensuring the sustainable exploitation of the stock as per the CCAMLR management procedure. The ... using the relevant tag mortality parameter. The shedding rate, TS, is a function of the time-at ... in Seber (1982). For a given number of tag-releases, the CV in abundance is at a maximum at zero ... observed number of tags would be very close to being fished-out, at least for certain param- eter draws ... chance at all in obtaining a reli- able estimate of r from the data alone. Normally, the r parameter is ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 101–113 : Autor(es): Hillary, R.M
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
series are typically collected at only a limited number of sites, so surrogate availability information ... , the method is applied to several examples of published studies of Adélie penguin abundance at breeding ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... function of sampling availability. ICESCAPE (Integrating Count Effort by Seasonally Correcting Animal ... . Such time series are typically collected at only a limited number of sites, so surrogate availability ... , the method is applied to several examples of published studies of Adélie penguin abundance at ... variable. The numbers of breeding Adélie penguins, nests and chicks present at a site are known to vary ... . The former are typified by one-off counts collected from a relatively large number of sites at times ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Autor(es): McKinlay, J., C. Southwell and R. Trebilco
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Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles
Abstract / Description: The importance of unmanned aerial vehicles (UAVs) in remote sensing is rapidly ... potential effects of wildlife disturbance by fixed-wing UAVs are investigated. In austral summer 2014/15 ... , UAV overflights were conducted in the Adelié penguin (Pygoscelis adeliae) breeding colony at Point ... . Thomas (Western Shore of Admiralty Bay, King George Island, Antarctica, Subarea 48.1). The impacts of ... conducted in the Adelié penguin (Pygoscelis adeliae) breeding colony at Point. Thomas (Western Shore of ... images at a lower cost than manned airplanes or satellites, and, therefore, offer ecologists a way of ... were done at the altitude of 350 m AGL. Take-offs and landings were from Arctowski Station, approx ... near their nest or at their neighbours. Type V – escape – birds abandoning nests. The number of ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Autor(es): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój