Resultados de la búsqueda
-
Results of study of the oogenesis characteristics of Antarctic toothfish (Dissostichus mawsoni Norman 1937) (Nototheniidae) from Subareas 88.1 and 88.2 (Ross Sea)
mawsoni) reproductive system, caught in December-March, 2004-2005 by the longliner VOLNA in subareas 88.1 ... and 88.2 in the Ross Sea are presented. The morphological parameters, indices of gonads have been ... toothfish ovaries from the stages II to IV show a slow increase in oocyte diameter. It was shown that for ... % of total cell number. The oocytes in the ovaries of analyzed fish did not reach the maximum size ...
Meeting Document : WG-FSA-07/49 : Autor(es): S. V. Piyanova and A.F. Petrov (Russia)
-
Proposal to standardise the submission of meeting documents to working groups
Committee, WG-EMM and WG-FSA (including ad hoc WG-IMAF). In doing so, the Secretariat noted some Working ... Group-specific differences in relation to: submission deadline; exception to the deadline; and approach ... to accepting revised documents. WG-EMM agreed that standardising the Working Groups’ guidelines in ... Secretariat’s work in preparing information and documents for meetings. Consequently, WG-EMM agreed to a ...
Meeting Document : WG-FSA-05/15 : Autor(es): Secretariat
-
Sounds like more krill
Abstract: Antarctic krill, Euphausia superba, comprise the foundation of the food-web in the ... Southern Ocean and are the target of a large fishery. Recently, the total abundance of krill in the Scotia ... Conservation of Antarctic Marine Living Resources (CCAMLR) to revise the precautionary catch level for krill in ... strength (TS). Presented here is a re-analysis of the CCAMLR 2000 data incorporating recent improvements in ...
Meeting Document : WG-EMM-04/41 : Autor(es): D.A. Demer and S.G. Conti (USA)
-
MaxEnt reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia 1996–2000
gathered in the boxes in austral summers 1996 – 2000. Krill densities had previously been determined at ... approximately 0.5 km intervals along transect for each of the ten 80 km transects in each box, providing about ... probable krill density for each of the 32000 0.5 km x 0.5 km cells in each survey box, taking explicit ... account of the spatial relationship between densities in the observed data. Despite some very large ...
Meeting Document : WG-EMM-02/36 : Autor(es): M.H. Wafy, A.S. Brierley, S.F. Gull and J.L. Watkins (United Kingdom)
-
Beach debris survey – Main Bay, Bird Island, South Georgia, 1997/98
revealed a total of 430 items, 49 percent more than the total of 289 items in 1996/97. The increase of the ... winter (April-September) total was 10 percent, from 109 items in 1996/97 to 120 items in 1997/98 both of ... of items collected in the summer was 310, an increase of 72 percent from the 1996/97 total of 180 ... of which clearly came from fishing vessels. The lower levels of debris collected in the winter months ...
Meeting Document : CCAMLR-XVIII/BG/6 : Autor(es): Delegation of the United Kingdom
-
BEACH DEBRIS SURVEY – MAIN BAY, BIRD ISLAND, SOUTH GEORGIA 1995/96
revealed a total of 710 items, 2% less than the record total of 725 items in 1994/95. However, whereas the ... total amount of debris collected during the winter (April-September) was 40% lower than in 1994/95, the ... continuing high levels of man-made debris and the recent rapid increase in levels during summer, coinciding ... with increases in entanglement of Antarctic fur seals, is of growing concern. Furthermore, despite the ...
Meeting Document : CCAMLR-XVI/BG/4 : Autor(es): Delegation of the United Kingdom
-
Climate change and precautionary spatial protection: ice shelves
Abstract: Regional climate change is now known to be well established in the Antarctic ... , particularly in the Antarctic Peninsula region. One of the most evident signs of climate change has been ice ... shelf collapse; overall, 87% of the Peninsula’s glaciers have retreated in recent decades. Ice shelf ... to return that were last present during the last interglacial, a warmer period than at present. In ...
Meeting Document : WS-MPA-11/17 : Autor(es): P.N. Trathan and S.M. Grant (UK)
-
Climate change and precautionary spatial protection: seasonal sea ice
Abstract: Regional climate change is now known to be well established in the Antarctic; however ... respond to climate change is potentially best carried out in regions and with species that have been ... harvesting. If CCAMLR is to embrace the wider implications of climate change in the context of ecosystem ... change, both in the presence of and absence of harvesting. We therefore recommend that locations ...
Meeting Document : WS-MPA-11/18 : Autor(es): P.N. Trathan and S.M. Grant (UK)
-
IDENTIFICATION OF DATA QUALITY METRICS FOR TAGGING DATA SELECTION
quality metrics may be most powerful in distinguishing the trips considered to have good tagging data ... . These include metrics for taxonomic resolution in the observer data, goodness of fit of catch data to ... Benford's Law, and the variation in toothfish catch rates.This reduced set of data quality metrics ... could be helpful in the identification of trips which have similar data quality to the known “good data ...
Meeting Document : WG-SAM-09/19 : Autor(es): D.A.J. Middleton and A. Dunn (New Zealand)
-
Pup production and distribution of breeding Antarctic fur seals (Arctocephalus gazella) at South Georgia
female being ashore at a census and for pregnancy rate (71 % in 1990/91), pup production was estimated as ... 269,000 (95% confidence intervals 188,000- 350,000). The breeding population in 1990/91 was reduced at ... long-term study sites probably because of a short term reduction in food availability. Data from these ... on values from 1983/84 to 1990/91, pup production in 1990/91 would have been 378,000 (S.E. = 19,100 ...
Meeting Document : WG-CEMP-92/39 : Autor(es): I.L. Boyd (United Kingdom)