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Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3
Paper Title: Towards an initial operational management procedure for the krill fishery in ... (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status ... , and an algorithm for specifying the levels of regulatory mechanisms (e.g., a catch control law) that ... depends on the results of the assessment. The development and selection of a procedure requires a basis ... the availability of CPUE data) is assumed to commence after 10 years of annual catches of 0.4 million ... than would occur in practice under the procedure described here. After this initial five year period ... that the size of the resource has fallen too low. To this end a target CPUE level (CPDEtar) is chosen ... projection period considered, rather than the average biomass at the end of the period as might be the case ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Автор(ы): Butterworth, D.S.
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Analysis of haul data from the South Georgia krill fishery
Paper Title: Analysis of haul data from the South Georgia krill fishery Abstract / Description ... : Data from individual hauls carried out by vessels operating in the South Georgia krill fishery between ... 1994 and 1996 were examined and a range of descriptive measurements reflecting the fishery operation ... were produced. The measurements emphasise that the krill fishery at South Georgia was geographically ... tightly clustered towards the end of the season. After each haul is complete, the distance to the next ... at South Georgia occurs during the austral winter and spans the end of one CCAMLR reporting year ... and the beginning of the next. Therefore to aid clarity in this study, data have been analysed by ... fish; fishing end time: the time at which hauling started and the net stopped fishing; * haul end ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Автор(ы): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes
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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 ... projection model for assessing the long-term annual yield which satisfies objectives for the maintenance of ... the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ... probability that the spawning biomass will become depleted to below some specified level over a specified ... respective start and end times of the spawning season within the year. Computation of the Functions ... the estimated median of the pre-exploitation spawning biomass, So (after Butterworth et al., 1994 ... end of the projection run and the lowest biomass between the current and end times. Modelling ... the current time to the end of the projection period shown in Figure 1. In a single run, the model ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Автор(ы): Constable, A. and W.K. de la Mare
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The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species
Paper Title: The ecosystem approach to managing fisheries: achieving conservation objectives for ... for the recovery of depleted populations in food webs supporting fisheries. This paper addresses the ... following general questions for applying the ecosystem approach to managing fisheries: (i) how might ... fisheries impact incidentally on an ecosystem, (ii) what should be the conservation objectives for predators ... and run for 500 years before a trial begins. The trial is run for 100 years with fishing beginning ... zero after 20 years. Prey 2 is more abundant (-3x) than Prey 1 in the absence of fishing and then ... increases its mean abundance over 10 years after the fishery begins as a result of the reduction in its ... CCAMLR Scier~ce, Vol . 8 (2001): 37-64 THE ECOSYSTEM ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 37–64 : Автор(ы): Constable, A.J
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Phytoplankton distribution in the mixed layer: implication to krill abundance
Paper Title: Phytoplankton distribution in the mixed layer: implication to krill abundance ... Abstract / Description: A one dimensional Lagrangian model of random walk is presented to study the ... distribution of phytoplankton in the Antarctic Ocean. Since little is known about mixed layer dynamics in the ... Antarctic Ocean, we estimate the depth of the mixed layer and its turbulence intensity from an Ekman layer ... does not give the same answer as averaging them after integration." An individual life history can ... beginning of the simulation 1 000 particles are located at the surface. Presumably phytoplankton ... time. At the end of the simulation 11 000 particles were traced. Table 1 summarizes simulation cases ... particle over the whole simulation. The particle leaves the mixed layer roughly after 5 days and is ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 331–356 : Автор(ы): Yamazaki, H. and T.R. Osborn
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Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program
statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program Abstract / Description ... : A potential method is presented for combining data collected as part of the CCAMLR ecosystem ... monitoring program (CEMP) into a single index for each of predator, prey and environmental parameters. The ... paper is divided into four main parts. The first part develops the proposed method of forming summary ... after its use) or as random occurrences. Ideally the value of the index in a given year should be ... new value after either 10 or 20 years to have value = 2.0. The variance of the distribution with ... depend on the fact that the shifted values are accumulated at the end of the data series because the ... as anomalies in a data series that follows after the baseline data. The critical values for ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 101–117 : Автор(ы): de la Mare, W.K. and A.J. Constable
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Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia
Paper Title: Effects of different harvesting strategies on the mackerel icefish Champsocephalus ... gunnari around South Georgia Abstract / Description: The effects of a number of harvesting strategies on ... the mackerel icefish (Champsocephalus gunnari) have been simulated for a period of 30 years. These ... 50% F 0.1 with F increasing three or five years after a good recruitment; pulse fishing at an ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Автор(ы): Köster, F.W. and K.-H. Kock
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Foraging behaviour and reproductive success in chinstrap penguins: the effects of transmitter attachment
Paper Title: Foraging behaviour and reproductive success in chinstrap penguins: the effects of ... transmitter attachment Abstract / Description: The use of radio telemetry has been accepted as a standard ... method with which to monitor foraging trip duration in penguins by the CCAMLR (Commission for the ... Conservation of the Antarctic Marine Living Resources) Ecosystem Monitoring Program (CEMP). This paper reports ... ) at the beginning of the observation period were used as a control group. No transmitters were ... group that contained chicks (Le., nests that failed were excluded) for the beginning and conclusion of ... observations. Nest failure rate was calculated as the number of nests which had failed by the end of ... : AND THE REPRODUCTIVE EFFECTS OF WG-CEMP-91/33 SUCCESS IN TRANSMITTER D.A. CroU, IL ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 291–303 : Автор(ы): Croll, D.A., J.L. Bengtson, P.L. Boveng, M.E. Goebel and J.K. Jansen
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
Paper Title: Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR ... conducted from September to October 2006 in the northern part of the Kerguelen Plateau (CCAMLR Statistical ... Division 58.5.1). The swept-area method was used in the depth range from 100 to 1 000 m with 207 random ... stratified stations. Estimates of biomass and abundance were produced for eight commercial species. The total ... 1987 and 1988 (SKALP surveys; see Duhamel, 1993a), nearly 20 years after the beginning of fish- ery ... the setup of a controlled fishery and the beginning of a French interest in the fish- ery. However ... that the POKER 2006 survey sampled the size range of the stocks in the area after the selectivity of ... after the POKER 2006 survey) for three increasing depth ranges (500–1 000, 1 000– 1 500 and >1 500 m ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Автор(ы): Duhamel, G. and M. Hautecoeur
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Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area
) (Channichthyidae) in the South Georgia area Abstract / Description: The otolith microstructure of juvenile ... a trawl survey of juveniles in February–March 2002 on the South Georgia shelf. Juvenile fish ... comprised two year classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of ... daily otolith growth increments decreased from 6 μm during the first 100 days (total length (TL) 4.5 cm ... - ment zones were selected at the beginning, mid- dle and end of the period, then their width was ... increments per zone and the mean otolith width at the end of the 100-day period estimated. Daily ... ) (CHANNICHTHYIDAE) IN THE SOUTH GEORGIA AREA L.V. Shcherbich AtlantNIRO 5 Dmitry Donskoy Street Kaliningrad ... 236000, Russia Email – atlant@baltnet.ru Abstract The otolith microstructure of juvenile mackerel icefi ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Автор(ы): Shcherbich, L.V
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