Search results
-
Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles
). Quantitative information on potential UAV dis- turbance of wildlife is rather scarce – observations on species ... N oi se le ve l: 70 d B a t a di st an ce o f 5 m 10 –5 0 m A G L Im pa ... (p en gu in n oi se ) G oe be l e t a l., 20 15 O sp re y (P an di on ha lia et ... U A V , n o la st in g di st ur ba nc e (q ui ck re tu rn to p re -s ur ve y be ha vi ou ... with penguins looking up and around for a few seconds when the UAV was overhead. Similar symptoms of ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Author(s): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój
-
An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
age structures in the same year and appear to have differences in their growth curves ... of year-class strength from the trawl surveys, using the same methods as for recent assessments ... of Patagonian toothfish (Dissosticht~s eleginoides) by WG-FSA (SC-CAMLR, 1996). The estimates of year-class ... ; and (ii) Shell Bank, which is separated from the plateau by water of depths greater than 500 m. Early ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Author(s): de la Mare, W.K., R. Williams and A.J. Constable
-
Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
Type I and Type II errors. Lack of knowledge about the sex ratio between years makes combining the data ... between years makes combining the data a very doubtful procedure and use of a discriminant function ... /O or cr2/0z sample size cr/O or cr2/0z sample size v in units of % success of a, in b,in standard dis ... of knowledge about the sex ratio between years makes combining the data a very doubtful procedure and use ... one year, and all males the next, then the characteristic will appear to have increased in size ... populations, but will probably not change significantly between years within the same population ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Author(s): Agnew, D.J.
-
Observations on haul-out patterns and trends in the breeding populations of southern elephant seal at Península Valdés (Patagonia) and Stranger Point (25 de Mayo - King George I.)
as three stocks : South Georgia, Kerguelen and Macquarie (Laws, 1960). Population decrease was reported ... present information on the last seven years in two breeding places belonging to the Georgia stock. Two ... reach Antarctic ~aters where they would recover the weight lost during lactation (Vergani, 1986 ... was determined to be representative of the original area and it was used every year to collect the information ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 453-463 : Author(s): Vergani, D.F., M.N. Lewis and Z.B. Stanganelli
-
Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90
statistics from the Soviet krill fishing fleet during the 1989/90 season (sample of 3 614 hauls for the ... fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a minimum in ... hydrodynamic characteristics of the area, for example a complex current around the islands together with ... north-east of the region. The fleet was observed drifting with the current together with krill ... , 1 518 (42%) by BMRT vessels with an engine of 3 000-3 100 hp and 564 (15.6%) by BMRT vessels with ... statistics from the Soviet krill fishing fleet during the 1989/90 season (sample of 3 614 hauls for the ... one fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a ... islands together with topographically-induced effects. Except in November 1989, temporally and spatially ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Author(s): Sushin, V.A
-
Use of indices of predator status and performance in CCAMLR fishery management
over several years (see SCAR 1979, p. 306; BIOMASS 1980, p. 16; BIOMASS 1982, p. 6; SC-CAMLR-IV ... in the marine environment, evidence for short-term changes (year-to-year differences or trends over three ... to five years) will rarely be available even at 90%, let alone 95% levels of statistical significance ... fishery policy on a year-to-year basis, we need to develop a system that takes notice of changes where ... factors potentially influencing or correlated with the changes. The relative merits and feasibilities of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 353–365 : Author(s): Croxall, J.P.
-
Standardization of fishing effort for Champsocephalus gunnari in the South Georgia area (Subarea 48.3)
different classes (countries, types of vessel, fishing gear, months and years). Multiple regression is used ... 48.3 is derived using a multiplicative model and data from many different classes (countries, types ... of vessel, fishing gear, months and years). Multiple regression is used to solve the model and the resultant ... a multiplicative model and data from many different classes (countries, types of vessel, fishing gear, months ... and years). Multiple regression is used to solve the model and the resultant yearly standardized CPUE ... coefficients of fishing mortality. For this purpose values of fishing effort for a number of years of fishing ... trawls, in recent years midwater trawls have been used. This impedes the formation of a sequence ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 327–336 : Author(s): Gasiukov, P.S.
-
Maximum entropy reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia, 1996–2000
successfully for many years in numerous branches of physical science to reconstruct images from incomplete ... are shown for the western and eastern survey boxes in Figure 1. All maps are at N scales = 6, apart from ... there are some very large differences in mean krill density between years (ranging from 36 to 12 ... between years for each box. In the west, in three of the four years for which data are available ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 91–100 : Author(s): Wafy, M.H., A.S. Brierley, S.F. Gull and J.L. Watkins
-
Modelling krill recruitment
that: In fact no generality is lost if we put E[A,] = 1 everywhere, and so: If the recruitment in each year ... a krill population we need, in each year of a simulation, a random recruitment in terms of number ... of years are independent, identically distributed random variables. However, what we can estimate ... , and the model is exercised for n years without exploitation prior to calculating the mean unexploited ... other parameters consistent with the observed proportional recruitment parameters. A procedure is given ... for generating families of recruitment functions which are consistent with the statistical uncertainty ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 49–54 : Author(s): W.K. de la Mare
-
Champsocephalus gunnari stock status in the South Georgia area
. The recruitment was taken at the lowest possible level for all these years (400 million specimens). Catch-per-unit ... . The recruitment was taken at the lowest possible level for all these years (400 million specimens). Catch-per-unit ... these years (400 million specimens). Catch-per-unit-effort was also taken at the lowest level. T AC ... 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table Legends Age (years) and weight (gr ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 1-18 : Author(s): Borodin, R. and P. Kochkin