Resultados de la búsqueda
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Dietary segregation of krill-eating South Georgia seabirds
success and information on diet in 5-10 other years suggest that in 1986 seabird diet and reproductive ... Abstract: The diets of six of the main seabird species (two petrels, two albatrosses, two ... period in 1986. For five species, Antarctic krill Euphausia superba was the main food (39-98% by mass ... ranges. selectivity by predators, or differences in escape responses of krill. For the krill-eating ...
Meeting Document : WG-EMM-97/15 : Autor(es): Prince, P.A., Croxall, J.P., Reid, K.
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Cooperación con otras organizaciones: acuerdos con organizaciones internacionales
Commission decision to renew these two Arrangements (CCSBT, SPRFMO) for a further 3 years. The Secretariat ... Abstract: CCAMLR has Arrangements with five other organisations. Two Arrangements (Commission for ... for those organisations that also catch toothfish to include cooperation with CCAMLR’s toothfish ... tagging program, and to cooperation with the CCAMLR Catch Documentation Scheme for Dissostichus spp. (CDS ...
Meeting Document : CCAMLR-XXXVII/10 : Autor(es): CCAMLR Secretariat
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RECRUITMENT AND BODY SIZE IN RELATION TO TEMPERATURE IN JUVENILE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) AT SOUTH GEORGIA
forecasts of years of good or poor recruitment for the toothfish fishery at South Georgia Author(s): M ... , South Atlantic. Data from 13 demersal trawl surveys conducted over a 20-year period were analysed ... . Abundance of the 1+ juvenile fish cohort (13 to 15 month old dependent on survey date) was found to vary ... attained after 13-15 months was higher in years of high juvenile abundance and was significantly inversely ...
Meeting Document : WG-FSA-08/P02 : Autor(es): M. Belchier and M.A. Collins
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Diet and prey consumption of Antarctic petrels Thalassoica antarctica at Svarthamaren, Dronning Maud Land and at sea outside the colony
Abstract: The diet of the Antarctic petrel Thalassoica antarctica was studied during two years at ... Svarthamaren, an inland colony situated in Dronning Maud Land, Antarctica and in the pack-ice outside ... found in other diet studies. Estimates of food consumption for birds breeding at Svarthamaren (c ...
Meeting Document : WG-EMM-97/58 : Autor(es): Røv, N., Lorentsen, S., Klages, N.
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A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia
on density data derived from acoustic surveys and on length-frequency data obtained from either ... target or station net hauls is described. This composite index is compared with an index where density ... successful recruitment year due to krill spawned in 1994/95. File: 06watkins.pdf ... recruitment index is dependent on the separation of krill into year classes. This is not an easy task and an ... factors provide an extra level of complication when deciding on the appropriate year classes. The ... Programme has carried out systematic net hauls at up to eight stations within each of two boxes on the ... per haul have been measured the numbers were left as raw numbers. Here I consider two methods for ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Autor(es): Watkins, J.L
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Preliminary tag-recapture based population assessment of Antarctic toothfish in Subarea 48.4
tagging returns to be 982 tonnes in 2018. Applying the CCAMLR agreed precautionary assumption of average ... biomass across the time series and harvest rate of γ = 0.038, implies a 2018/19 yield of 37 tonnes ... the 48.4 Antarctic toothfish as a separate stock. Based on the biological characteristics of the ... 48.2, 48.6 and possibly 48.5. The current method of assessment, based on tag returns, consequently, is ...
Meeting Document : WG-FSA-18/26 : Autor(es): T. Earl and A. Riley
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Acoustic data analysis and models of krill spatial distribution
Abstract: Acoustic data obtained on the 4-5 January 1987 aboard the R/V Professor Siedlecki were ... used in three descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in ... biomass estimate. The wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales ... not vary significantly over most distances between points except for the distances smaller than 1 km ...
Meeting Document : SC-CAMLR-VII/BG/25 : Autor(es): United States of America
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Linking population trends of Antarctic shag (Phalacrocorax bransfieldensis) and fish at Nelson Island, South Shetland Islands (Antarctica)
in the number of breeding pairs of Antarctic shag Phalacrocorax bransfieldensis in two colonies on ... the 1990s up to the mid 2000s over an overall monitoring period of over two decades. It addresses ... of this area, where an intensive commercial fishery for shag prey once operated. The analysis also ... includes comparable information on diet (by examination of regurgitated pellets), foraging patterns, and ...
Meeting Document : WG-EMM-16/P09 : Autor(es): R. Casaux and E. Barrera-Oro
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Homogeneity of body length composition of Antarctic krill within the commercial zone
=163 x=51.7 20 30 40 50 60 Length (mm) Figure 2: Comparisons of kriU length compositions for ... x=47.2 20 Data set 2* 30 40 50 Length (mm) 60 15 10 5 n=182 x=48.7 n=187 x ... " 10 CD x=38.9 x=37.5 l0- w.. 5 0 20 30 4D 50 60 Data set 53* Data set 49** ..-.. 15 ~ n ... .. 10 x=42.0 x=44.5 5 0 20 30 40 50 60 Length (mm) Leng t h (mm) Figure 2 (continued) 24 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 17–28 : Autor(es): Ichii, T.
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THE RISKS OF NOT DECIDING TO ALLOCATE THE PRECAUTIONARY KRILL CATCH LIMIT AMONG SSMUS AND ALLOWING UNCONTROLLED EXPANSION OF THE KRILL FISHERY UP TO THE TRIGGER LEVEL
might be incurred by not deciding on such an allocation (i.e., a risk assessment of status quo ... Abstract: After the Scientific Committee did not reach consensus and advise the Commission on the ... risks associated with three options for a Stage-1 allocation of the precautionary krill catch limit ... ability to achieve the objectives specified in Article II, and ii) the current trigger level is not as ...
Meeting Document : WG-EMM-09/12 : Autor(es): G.M. Watters (USA), S. Hill (United Kingdom), J.T. Hinke (USA) and P. Trathan (United Kingdom)