Search results
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Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
a certain proportion of birds. Two overlapping normal distributions are used to show ... of birds with greater than 80% success, the difference between the true and apparent mean is likely ... a discriminant function with greater than 80% success may be used to derive statistically robust estimates ... Type I and Type II errors. Lack of knowledge about the sex ratio between years makes combining the data ... one year, and all males the next, then the characteristic will appear to have increased in size ... femelles. 11 n'est plus necessaire de determiner les sexes si l'on utilise la procedure qui consiste ... was made that one way to avoid the problem of sex detennination would be to combine males and females ... an apparent mean for one sex which is significantly different from the true mean for that sex. Thus if we ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Author(s): Agnew, D.J.
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Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
for at least one year. Individual oocytes are then recruited into the vitellogenic phase over at least a 6–12 ... by approximately May each year. The age at 50% spawning for females on the Ross Sea slope region is 16.6 years (95 ... by approximately May each year. The age at 50% spawning for females on the Ross Sea slope region is 16.6 years (95 ... at a younger age with an A50% of 12.8 years (95% CI 11.9–14.0) or 120.4 cm (95% CI 114.8–126.7 ... is then one year older than the age used for the hindcasting method, and size is accordingly different ... ) regions. As the male analysis used a forecasting method, age is one year older at spawn- ing and length ... . To compare the forecasting and hindcasting methods, fish ages for the forecast- ing method were advanced one ... % of Lmax (for females, 64% for males). However, one unique aspect of this late age-at-spawning ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Author(s): Parker, S.J. and P.J. Grimes
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Method for collecting of data on traumatic death of krill passed through the trawl meshes
of krill individuals some part of them could pass through cover of net bag and escape of catch. In contact ... individuals, passed through meshes of net bag cover of fishing gear was carried out with specially made net ... and R.O. Lebedev (Russia) Title: Method for collecting of data on traumatic death of krill passed through ... individuals some part of them could pass through cover of net bag and escape of catch. In contact with threads ...
Meeting Document : WG-EMM-12/43 : Author(s): V.V. Akishin, I.G. Istomin, V.A. Tatarnikov, A.F. Petrov and R.O. Lebedev (Russia)
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Proposal for a CCAMLR sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
of the survey, the target fish age and length classes to be monitored, appropriate survey strata size ... fish age and length classes to be monitored, appropriate survey strata size and location, the number ... Abstract: The exploratory fishery for Dissostichus spp. has now been operating for 14 years ... in Subarea 88.1 and for nine years in Subarea 88.2. Associated research has led to an assessment ...
Meeting Document : WG-SAM-11/16 : Author(s): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)
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WG-EMM-15
and D.J. LeRoi WG-EMM-15/P07 Selectivity and two biomass measures in an age-based assessment of Antarctic ... . stakeholders’ objectives and protection priorities for one or more marine protected areas in Planning Domain ... (Australia) WG-EMM-15/45 Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk ... sections for age determination C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia) WG-EMM-15/46 ...
Meeting
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The foraging range of Adélie penguins at Béchervaise Island, Mac. Robertson Land, Antarctica, and its overlap with the krill fishery
. Birds feeding chicks also made journeys of one to two days ranging up to 12 km after 17 January when ... journeys of one to two days ranging up to 12 km after 17 January when the sea became ice free to the coast ... Shetland and South Orkney Islands and reflects the distance offshore of krill, one of their major food ... Orkney Islands and reflects the distance offshore of krill, one of their major food sources. ... chicks also made journeys of one to two days ranging up to 12 km after 17 January when the sea became ... Orkney Islands and reflects the distance offshore of krill, one of their major food sources. Resume ... AND DISCUSSION Ten birds were instrumented utilising seven PTTs. Twenty-one foraging trips were recorded ... as they travelled away from the colony. Once the birds started to return they did so directly and quickly following ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 337–344 : Author(s): Kerry, K.R., J.R. Clarke and G.D. Else
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ABUNDANCE AND BIOLOGICAL INFORMATION ON TOOTHFISH IN DIVISION 58.4.4a & b BY SHINSEI MARU NO. 3 IN 2007/08 SEASON
, Shinsei Maru No. 3, from July 23 to September 27, 2008. The survey was undertaken in two Phases (Phase ... % in numerical number and 90-96 % in weight to the total samples in SSRUs. Mean CPUE of toothfish in number ... 1 and Phase 2, respectively. Mean CPUE of toothfish in weight by SSRU ranged from 64.0 to 80.7 kg / 1,000 ... (10-minute latitude x 20-minute longitude) standard stratification method, mean CPUE for the Division ...
Meeting Document : WG-SAM-09/10 : Author(s): K. Taki, T. Ichii, M. Kiyota and S. Kawahara (Japan)
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Experimental evaluation of the effectiveness of weighting regimes in reducing seabird by-catch in the longline toothfish fishery around South Georgia
. Two experiments were conducted: (i) a comparison of the use of one stone at each attachment site ... (single weight) and the other had the two-stone setup (double weights). In the second experiment one ... with the vessel in large numbers. Typically, one or two birds of this species were present during setting ... oiseaux est marquee lorsque l'on utilise des poids de 8,5 kg par rapport aux poids de 4,25 kg, mais on ne ... effects of different weighting regimes on the incidental mortality of birds caught on longlines fishing ... attached at 40 m intervals on a Spanish-rigged longline. There was a significant reduction in bird ... intervals should be used. Results suggested that seabird by-catch on lines using effective weighting regimes ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 119–131 : Author(s): Agnew, D.J., A.D. Black, J.P. Croxall and G.B. Parkes
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Potential interactions between wandering albatrosses and longline fisheries for Patagonian toothfish at South Georgia
% of their uplinks were over the South Georgia shelf, most of the remainder being in one or two specific areas ... of their breeding season (which lasts and involved a total of five vessels, only one almost one complete year ... need frequent feeding and one parent remains at the nest brooding or guarding the young chick ... , injury to or death of one parent at this time will certainly cause the young chick to die. Furthermore ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 101–110 : Author(s): Croxall, J.P. and P.A. Prince
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A review of the trophic role of mesopelagic fish of the family Myctophidae in the Southern Ocean ecosystem
and spring periods feeding intensity is only half to one-third of the summer levels (Kozlov and Shust, 1991 ... of one species of squid, 18 species of fish (.Nototheniidae - 8, Channichthyidae - 7, Bathydraconidae ... of this particular squid (Klumov and Yukhov, 1975) and that myctophids account for 50 to 60% of that amount, one ... - et macroplancton consommee par les Myctophidae met en evidence le niveau eleve d'abondance et de ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 71–77 : Author(s): Kozlov, A.N