Search results
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
of the median unexploited spawning biomass Abstract / Description: Two Monte Carlo simulation models, the krill ... Two Monte Carlo simulation models, the krill yield model and the generalised yield model (GYM ... age structures to estimate S,,. Two types of comparisons are made. In the first case ... M ~ A H ~ H H O ~ ~ ~ ~ B C T B ~ H H O ~ ~ H ~ ~ ~ C T O B O ~ ~ ~ H O M ~ C C ~ I B XOAe 0)JHOrO 3KCTpanOnR~I?OHHOrO IIepHOAa H (ii) MeAHaHHOe COCTORHMe HepeCTOBOrO 3aIIaCa B KOHUe ... 5, is a single calculation of the spawning biomass in a population with a deterministic age structure based ... multiple random determinations of a pre-exploitation age structure (the number of determinations is able ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Author(s): Constable, A.J. and W.K. de la Mare
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Statistical problems in krill stock hydroacoustic assessments
: Two primary issues are at question for hydroacoustic assessments of krill. The first is the methods ... to be not the absolute amount of biomass present in an area, but rather how it is distributed. The issue of patchy years ... Two primary issues are at question for hydroacoustic assessments of krill. The first is the methods ... to be not the absolute amount of biomass present in an area, but rather how it is distributed. The issue of patchy years ... surveys in two consecutive years giving identical biomass for a surveyed area, in one, the biomass ... and variance of the population. Because of the high sampling frequency of a hydroacoustic survey (one sample ... ) or biotic ones due to migratory behaviour. Micronekton and nekton (especially large zooplankton and fish ... ) may swim fast enough in a single day to traverse from one transect to another and hence be sampled ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 301–309 : Author(s): Macaulay, M.C.
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Age and growth of Antarctic euphausiacea (crustacea) under natural conditions
Paper Title: Age and growth of Antarctic euphausiacea (crustacea) under natural conditions ... Age and growth of Antarctic euphausiacea (crustacea) under natural conditions ... Peninsula and the south-eastern Weddell Sea. Life spans range from two years for Euphausia frigida to six ... and the south-eastern Weddell Sea. Life spans range from two years for Euphausia frigida to six years ... - 369 - SC-CAMLR-VI/BG/24 AGE AND GRcwrH OF ANTARCTIC ... and the south-eastern Weddell Sea. Life spans range from two years for Euphausia frigida to six years ... triacantha, and a three-year life span proposed. Male Euphausia cr¥stallorophias have a shorter life span ... la duree d'une generation pour chaque espece sont brievement decrits. De fa90n generale, les ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 369-370 : Author(s): Siegel, V.
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Modelling krill recruitment
, the proportion of recruits is a function of S, the survival rate from one age class to the next, which is given ... A, is the number of animals in age class i, and n is the age of the oldest age class present in non-negligible ... , is the ratio of numbers in age class t to the numbers in that age class and above, that is: where ... by: If M is assumed to be independent of age up to age n, and infinite thereafter, then in an equilibrium population ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 49–54 : Author(s): W.K. de la Mare
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Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
inoides and one (dataset B) is from a shallow-water artisanal longline fishery for the same species ... are potentially quantifiable; however many of the older data are not available in sufficient detail. This is one ... regressions performed on each data series. At its 1994 meeting, WC-FSA used a one-tailed Student's ... different processes affecting CPH as catch accumulates. Although one of the datasets shows apparently ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Author(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young
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A preliminary assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea based on data from predators
a further 51 400 tonnes. M. hyadesi probably has a life span of two years and a circumpolar distribution ... . M. hyadesi probably has a life span of two years and a circumpolar distribution, but its biology and ecology ... target species from two families, Loliginidae and Ommastrephidae. Fisheries for the latter have been ... Cephalopod fisheries world-wide mainly target species from two families, Loliginidae ... )KHbIM MOPCKHM CJIOHOM, npH 3TOM npOtlHe BH~bl MoryT ,l{OnOJIHHTeJIbHO nOTpe6J1SITb no MeHblleti Mepe ... . M. hyadesi probably has a life span of two years and a circumpolar distribution, but its biology and ecology ... ** Abstract Cephalopod fisheries world-wide mainly target species from two families, Loliginidae ... ~OBOrO BblJlOBa H tlaCTblMH nepexo- ~aMH Ha 3KCnJIyaTaIJ,HIO npOtlHX BH~OB. TaKHM 06pa30M BepOSITHO ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 479–480 : Author(s): Rodhouse, P.G.
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An iterative model to construct an age/length key to assess the age composition of a new fishery for Dissostichus eleginoides in Chilean waters
Paper Title: An iterative model to construct an age/length key to assess the age composition ... estimation of age composition of catch requires that age/length data and random length frequency have been ... sampled from the same population. If such sampling is not possible the estimates of the age distribution ... could be biased. By using an iteration algorithm it is possible to overcome this limitation. The age ... that age distribution derived from the model is not significantly different from the one obtained ... . O~~~~~~--~~---L--~~~~ 2 4 6 8 10 12 14 16 11 20 Edod COMPOSitiON tAPTURA EDAD ABR - "UN 1992 21.000 ... 2: PHCYHOK 1: PHCYHOK 2: 20 List of Tables Age composition of D. eleginoides catches obtained ... estimation of age composition of catch requires that age/length data and random length frequency have been ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 11–20 : Author(s): Robotham, V. H. and Z. Young U.
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Survey design to estimate krill abundance during FIBEX
Paper Title: Survey design to estimate krill abundance during FIBEX Abstract / Description: One ... One of the primary aims of FIBEX (First International BIOMASS Experiment), 1981 was to study ... was done in two phases. In the first phase a fairly evenly dispersed subsample of transects was surveyed ... . The survey was done in two phases. In the first phase a fairly evenly dispersed subsample of transects ... . B aToH pa60Te onHCbIBaeTC51 nJIaHHpOBaHHe cbeMKH, HCnOJIb30BaHHoe B IOrO-BOCTOqHOM aTJIaHTHqeCKOM ... ABUNDANCE DURING FIBEX I. Everson, I. Hampton, G.M. Jolly Abstract One of the primary aims of FIBEX ... of potential living resources (SCAR 1977). Estimation of krill abundance was identified as being one ... of the key topics for study and this became one of the major investigations for FIBEX (First International ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 253–263 : Author(s): Everson, I., I. Hampton and G.M. Jolly
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
, there is a 20-year time series of data on the repro- ductive performance of krill-dependent predators ... des filets n'affichent qu'une difference de l%, ce qui met en Pvidence la n6cessitP d'obtenir des ... XMWHHKOB AJIX OQeHKM YaCTOTHOrO PaCnpeAeJIeHMR AJIUH TOrAa, KOrAa Ha CyAHe MOrYT UCIIOJIb30 ... in predator performance. Clearly, in order to consider the interaction between these two factors, measures ... from land-based predators directly with automated on-board data collection systems it will be possible ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Author(s): Reid, K. and A.S. Brierley
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Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)
) was measured and weighed and their effectiveness as predictors of fish length and fish mass determined. The two ... and weighed and their effectiveness as predictors of fish length and fish mass determined. The two measures ... five separate surveys and one season of the commercial fishery around South Georgia. Sampling periods ... ~aR KpHBaR OnBCbIBaeTCX YpaBHeHkteM L, = 6,275 X L,',878. PHCYHOK 2: rpa@HK pa36poca - o614ax AnHHa ... oco6eB OTHOCHTenbHO MaCCbI OTOIIUTOB. n o ~ o 6 p a ~ ~ a ~ KpBBaR OnBCbIBaeTCX YpaBHeHBeM L, = 9,763 ... regression model allowing for parallel lines for each year (F4.846 = 30.57, p < 0.001); including extra ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Author(s): Everson, I., B. Bendall and A. Murray