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1. A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty

   Paper Title:  A generalised model for evaluating yield and the long-term status of fish stocks ... under conditions of uncertainty Abstract / Description:  This paper presents a general fish stock ... projection model for assessing the long-term annual yield which satisfies objectives for the maintenance of ... period and set a further constraint on the long-term status of the stock relative to the pre-exploitation ... up the number of fish in each age class at the start of the simulation period. Each age class is ... and spawning stock is calculated for each age class during the projection. At the completion of the ... fish in age class a at time of year t in year y. The term M.m(a + t ) gives the rate of natural ... mortality which applies to age class a at time of year t . M is the average rate of natural mortality ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Автор(ы): Constable, A. and W.K. de la Mare

2. Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen Islands areas

   Paper Title:  Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen ... Islands areas Abstract / Description:  The benefits of conservation measures are generally based on the ... rebuilding of the depleted stocks and improvement in yields. It is desirable that such measures be based on ... the expected rate of recovery relative to rates of fishing. A simulation model based on a ... group also estimated that the stock could be expected to increase at an approximate rate of 30% per ... presents projections of the stocks and catch over the next 20 years for the major species of concern at ... over time, at least relative to the effects of recruitment. With these fixed parameters, the ... caught. The estimated fishing mortality at age was rather variable from year to year. The age of first ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 229-298 : Автор(ы): Hennemuth, R.C., K.D. Bisack and G. Duhamel

3. Analysis of variability of krill size and fish by-catch in the Japanese krill fishery based on scientific observer data

   Paper Title:  Analysis of variability of krill size and fish by-catch in the Japanese krill ... size of scientific observer data collected on Antarctic krill commercial fishing vessels, the ... Bayesian model. The models were composed of multistage cluster units (i.e. year, subarea, vessel, cruise ... variability in the size structure of the krill population, which is presumably derived from large variability ... mean krill length at subarea j in year i; μ is grand mean of krill length in the whole study area ... . Observation model The observed krill length of individual q in haul l of vessel k operating at subarea j in ... mean number of by-catch fish at subarea j in year i; μ' is the grand mean of the log-transformed ... mean number of by-catch fish caught by haul l of vessel k operating at subarea j in year i. The terms ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 31–47 : Автор(ы): Okuda, T. and M. Kiyota

4. Validation of sink rates of longlines measured using two different methods

   Paper Title:  Validation of sink rates of longlines measured using two different methods Abstract ... / Description:  Sink rates of integrated weight longlines (lines with 50 g.m –1 lead integrated into two strands ... of the ground line – IW-50 lines) were measured during commercial fishing operations using two ... methods: electronic time depth recorders (TDRs) and pieces of string of known length wrapped around empty ... on the sink rates caused by the anchors at either end of the lines. When lines were set during the ... the internal temperature sensors of the TDRs and kept them at the same temperature as the seawater ... a measure of how a sinking longline behaved in the propeller-wash zone near the surface and at ... pressure transducer communications port 183 Validation of longline sink rates The time at which the ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 179–187 : Автор(ы): Wienecke, B. and G. Robertson

5. A balanced model of the food web of the Ross Sea, Antarctica

   Paper Title:  A balanced model of the food web of the Ross Sea, Antarctica Abstract / Description ... :  A quantitative food web of the Ross Sea is presented here as a step towards investigating ecosystem ... effects of the fishery for Antarctic toothfish (Dissostichus mawsoni). The model consolidates quantitative ... information on trophic links across all the major biota of the Ross Sea and tests for data consistency. The ... of the Antarctic Slope Front (Jacobs, 1991) which, in part at least, hydrodynamically separates the ... Ross Sea (Norkko et al., 2004) is estimated to be unimportant to flows of material at the scale of ... of animals that died due to predation but were not consumed at the time; (v) transfers of biota ... ‘closest’ to the initial set of estimated parameters as defined below. The problem at this stage is non ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 1–31 : Автор(ы): Pinkerton, M.H., J.M. Bradford-Grieve and S.M. Hanchet

6. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

   Paper Title:  Possible effects of different levels of krill fishing on predators – some initial ... suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group for the ... CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... krill fishing on krill predators. First, estimates are made of the parameters of predator survival rates ... . one realised after any transient effects from the commencement of fishing at an intensity y have ... widening. The survival rates and breeding success of krill predators must depend, to some extent at ... least, on the level of krill biomass. Both will tend to be good at high biomass levels, and poor at ... for some of the parameters. To render the effects at work in the analysis of this paper more ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Автор(ы): Butterworth, D.S. and R.B. Thomson

7. Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass

   Paper Title:  Analyses of acoustic line-transect data from the waters around South Georgia ... : estimation of krill (Euphausia superba Dana) – biomass Abstract / Description:  A large-scale acoustic survey ... of zooplankton stocks in the waters around South Georgia was carried out during November and December ... 1981. The data have been analysed using various definitions of strata. The total biomass in the area of ... at random to reduce the possibility of systematic errors. Each transect was divided into six ... (MVBS). 226 At the end of each section various 'station' activities were carried out as part of ... -107.8 Pulse duration was measured at 0.6 msec. Not all of the acoustic targets will have been krill ... . An estimate of the mean bottom depth was available for each section. The CTD profiles collected at ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Автор(ы): Murphy, E., I. Everson and A. Murray

8. Mesopelagic fish of the Southern Ocean - summary results of recent Soviet studies

   Paper Title:  Mesopelagic fish of the Southern Ocean- summary results of recent Soviet studies ... a part of the general multi-disciplinary program of research on Antarctic biological resources ... are sufficient to allow a description of the general ecology and distribution of these species. Some ... recently published results of these studies. A general description of mesopelagic myctophids is followed by ... hours in the upper 50 to 100 m layer and descending to the deep waters at night. These types of ... conclusion that at all stages of their life history they are confined to the ACC waters although each ... assessed at about 1.7xl06 tonnes (Filin et al., 1991). Recent biomass assessments of all mesopelagic ... intensity is greatest in autumn/winter. In summer, the gonads of adult specimens are at maturity Stages Ill ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 433–457 : Автор(ы): Sabourenkov, E.N.

9. Sources of variance in studies of krill population genetics

   Paper Title:  Sources of variance in studies of krill population genetics Abstract / Description ... :  There has been a long-term interest in the population genetics of Antarctic krill species because of ... their ecological and economic importance. The possibility that there are distinct genetic stocks of ... these species would affect the design of management strategies for their conservation. A recent ... polymerase (Promega) and 10 pmol of each primer were included. The reactions had an initial incubation at ... 72ºC 1 min for 40 cycles. A 6 min incubation at 72ºC followed to fi nish synthesis of incomplete ... for each individual. 10 μL of each completed PCR amplifi cation was restriction digested at 37ºC ... s st ud ie s of t hr ee k ri ll sp ec ie s. A ll st ud ie s to d at e us e ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 107–116 : Автор(ы): Jarman, S.N. and S. Nicol

10. Distribution and relative abundance of juvenile icefish (Champsocephalus gunnari) from a trawl survey of the South Georgia shelf in June–July 1985

    Paper Title:  Distribution and relative abundance of juvenile icefish (Champsocephalus gunnari ... ) from a trawl survey of the South Georgia shelf in June–July 1985 Abstract / Description:  A trawl ... survey of the distribution and relative abundance of juvenile icefish (Champsocephalus gunnari) in South ... juvenile trawl of 13.6 m. The size range of juvenile icefish collected was 82–146 mm. Catches were the ... -bottom (2-5 m off the sea-bed), mid-Water and near surface. The duration of each haul was 10 minutes at ... station at one location was sampled with 16 tows. * the term "stratum" refers to the shelf zone of ... of 16 hauls was conducted to study vertical distribution of the juvenile mackerel icefish at one ... . The day-time catches of juvenile fish were in general 8.5 times higher than those at night. This ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 55-63 : Автор(ы): Boronin, V.A., G.P. Zakharov and V.P. Shopov

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