Resultados de la búsqueda
-
CALIBRATION ERROR IN THE AMLR PLANKTON TIME SERIES
Isaac-Kidd Midwater Trawl (IKMT) from 1992 to 2007 showed a marked decline (~35%) in the volume of water ... filtered beginning in 2000. Analysis of tow time duration, reported ship speed during tows, and mean number ... of rotor counts from the flow meters showed no significant trends. The discrepancy in volume is ... traced to a simple arithmetic error in the calculation of the mouth area of the net. Since 2000, the net ...
Meeting Document : WG-EMM-08/19 : Autor(es): C. Reiss (USA)
-
Penguin foraging behavior in relation to the distribution of prey
of their primary prey, krill (Euphausia superba) in the vicinity of Seal Island, South Shetland ... migration pattern, being dispersed in the upper portion of the water column at night and more concentrated ... midnight, with a reduction in effort around dawn and dusk (local apparent time). The mean and maximum depth ... dives did not exceed the maximum depth distribution of krill. These patterns in diving behavior may ...
Meeting Document : WG-KRILL-93/47 : Autor(es): D.A. Croll, R.P. Hewitt, D.A. Demer and J.K. Jansen (USA)
-
Preliminary report of outcomes of the 2nd international workshop on the ICED Southern Ocean Sentinel, held in Hobart Australia 7–11 May 2012
Headquarters on 7-11 May 2012 in Hobart, Australia, hosted by the Australian Antarctic Division and the ... the discussion on strategies for measuring change in Southern Ocean marine ecosystems, including ship ... benchmarking Southern Ocean ecosystems in 2020 and for establishing routine activities for estimating change in ... involved in this work, particularly through the Working Group on Ecosystem Monitoring and Management and ...
Meeting Document : WG-EMM-12/59 : Autor(es): A. Constable (Australia)
-
Long term variability in the diet and reproductive performance of penguins at Bird Island, South Georgia
Abstract: Inter-annual variability in diet during crèche (December to February) over 22 years ... present in 89 % of samples and were the main prey (> 50 % by mass) in 10 years of the study. Antarctic ... krill Euphausia superba were present in 85 % of all diet samples. Fish were present in 79 % of samples ... and were the main prey in 12 years, with Champsocephalus gunnari and Lepidonotothen larseni the most ...
Meeting Document : WG-EMM-17/P02 : Autor(es): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan
-
Annual report of research fishing operations at Division 58.4.3a in the 2017/18 fishing season
toothfish (Dissostichus eleginoides) in Division 58.4.3a in the 2017/18 fishing season by France and Japan ... . One fishing cruise by French vessel (“ Mascareignes III ”) took place in May 2018 and caught 2.5 ... tonnes of D. eleginoides in 58.4.3a. The data set, C2 and Observer data, were provided by the CCAMLR ... Secretariat on the 21th August 2018. In this paper, the data set during current fishing season (2017/18) was ...
Meeting Document : WG-FSA-18/50 : Autor(es): Delegations of France and Japan
-
Fish by-catch in the krill fishery: 2018 update
Abstract: Data on fish bycatch in the krill fishery from commercial catch data (120 949 hauls ... increase in the data quality from the observer scheme and an increase in the frequency of fish bycatch in ... the commercial krill fishery catch data. As in previous years there was a high degree of overlap in ... the most frequently reported taxa in the C1 data and SISO data, with Lepidonothen larseni the most ...
Meeting Document : WG-FSA-18/10 : Autor(es): CCAMLR Secretariat
-
Proposal for a winter longline survey of Antarctic toothfish in the northern region of Subareas 88.1 and 88.2
up in the spring, may provide access to a productive pagophilic ecosystem for feeding as well as a ... patterns may be influenced by changes in sea ice or circulation patterns that affect observed recruitment ... productivity of the stock assumed in the stock assessment. 3) Biological characteristics of the northern ... . Evidence to date found no change in these characteristics in June, suggesting sampling later in the ...
Meeting Document : WG-FSA-18/40 : Autor(es): Delegation of New Zealand
-
An updated descriptive analysis of the toothfish (Dissostichus spp.) tagging program in Subareas 88.1 and 88.2 for 2006/07
Abstract: Descriptive analyses of the toothfish tagging programme carried out in Subareas 88.1 ... vessels and preliminary data for other vessels that fished in 2007. Release and recapture data that ... described in this paper for the first time. Overall, a reported total of 12 177 Antarctic toothfish have ... . The number of tags recaptured in the Ross Sea in 2007 by New Zealand vessels was the highest annual ...
Meeting Document : WG-SAM-07/5 : Autor(es): A. Dunn, S.M. Hanchet and S.L. Ballara (New Zealand)
-
A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2005/06
nine years in Subarea 88.1 and for five years in Subarea 88.2 with a large amount of data collected on ... toothfish and the associated bycatch. All SSRUs in the two subareas except for 881D and 882C have now been ... combined catch limit of 3451 t. The subarea catch limit was almost reached in both Subarea 88.1 and 88.2 ... catch limit being slightly exceeded in the 2006 season. Concentration of effort within a smaller spatial ...
Meeting Document : WG-FSA-06/29 : Autor(es): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)
-
Oceanological factors affecting formation of mackerel icefish aggregations in the South Georgia area during different seasons of the year
Abstract: In wintering period icefish do not form aggregations, is feeding inactively and ... disperse at the depths more than 250 m within rather narrow temperature range (1.6-1,7ºC). In this period ... the water temperature is a limiting factor restricting fish distribution. In spring-summer icefish are ... feeding at the water temperature from 0.0ºC to 1.9ºC in the South Georgia area and to 2.0ºC near Shag ...
Meeting Document : WG-FSA-05/76 : Autor(es): Zh.A. Frolkina (Russia)