Search results
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Results of fish larvae sampling by means of fine-meshed samplers attached to a bottom trawl
inset was fixed in the end of the 12 mm samplers of larvae. After this change, with a few exceptions ... different mesh sizes is given in Table 1. At the beginning of the bottom survey (stations 19-226) the 12 mm ... bottom trawl Abstract / Description: Fine-meshed samplers were attached to the top of a bottom trawl in ... order to provide information on the composition, distribution and abundance of Antarctic fish larvae in ... the near-bottom zone, which is usually not sampled using plankton nets. The efficiency of various ... sized meshes for sampling larvae in the bottom zone and the resistance of the samplers to damage during ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 69-86 : Author(s): Ślósarczyk, W. and I. Wójcik
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Phytoplankton distribution in the mixed layer: implication to krill abundance
not give the same answer as averaging them after integration." An individual life history can only ... with uniform intensity. 3.2 Simulations At the beginning of the simulation 1 000 particles are located ... at every 24 hours over 10 day simulation time. At the end of the simulation 11 000 particles were traced ... roughly after 5 days and is trapped in the base of the mixed layer for a day and half. The particle ... 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 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 331–356 : Author(s): Yamazaki, H. and T.R. Osborn
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Statistical power to detect changes in growth rates of Antarctic fur seal pups
pups at monthly intervals beginning about 30 days after mean pupping date and concluding prior ... on which pups should be weighed. If the first sample is weighed 30 days after mean pupping date, three ... additional samples at monthly (say 28-day) intervals would conclude on the 114th day after mean pupping ... Abstract / Description: Numerical simulations were used to investigate the power of methods for detecting ... changes (between years) in pup growth rates, the loss of power associated with obtaining weight samples on ... only three dates in a season, and potential means of increasing the power of the CCAMLR Ecosystem ... (60°59.5'S, 55°24.5'W), the simulations suggest that following the protocol of the Standard ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Author(s): Boveng, P., J.L. Bengtson and M.E. Goebel
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Foraging behaviour and reproductive success in chinstrap penguins: the effects of transmitter attachment
) at the beginning of the observation period were used as a control group. No transmitters were attached to adults ... ., 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 observations divided by the number of nests ... : Start 1.74 1.4 1.70 End 1.43 1.23 1.33 % Change -18% -12% -22% Nest Failure Rate 12% 35% 40% 299 ... 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 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 291–303 : Author(s): Croll, D.A., J.L. Bengtson, P.L. Boveng, M.E. Goebel and J.K. Jansen
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Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01
by including surveys at the very beginning and end of the fi eld season (October and March) in addition ... variances) after Jolly and Hampton (1990). In order to identify any signifi cant between- survey ... or just the four surveyed at each end of the season provides reassurance that meaningful data can ... arrive at South Georgia predominantly by a route that introduces them fi rst to the eastern end ... acoustic surveys of Antarctic krill (Euphausia superba) were conducted around South Georgia in the 2000/01 ... March 2001 (late-season). The surveys were the first in a newly planned five-year series of observations ... designed to complement and extend an existing time series regularly maintained by the British Antarctic ... Survey since 1996 (and on a more ad hoc basis since the early 1980s). We hoped that conducting several ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Author(s): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst
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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
to or after its use) or as random occurrences. Ideally the value of the index in a given year should ... normal distribution initially with mean = 1.0, which shifts to a new value after either 10 or 20 years ... on the fact that the shifted values are accumulated at the end of the data series because the statistic ... that follows after the baseline data. The critical values for identifying anomalies were calculated ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 101–117 : Author(s): de la Mare, W.K. and A.J. Constable
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
20 years after the beginning of fish- ery. The first biomass estimates were produced from ... to the second phase in the fishery’s development with the setup of a controlled fishery and the beginning ... survey sampled the size range of the stocks in the area after the selectivity of the mesh size had been ... , CPUE) for D. eleginoides long- line catches reported during October/November 2006 (immediately after ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Author(s): Duhamel, G. and M. Hautecoeur
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The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)
areas to start at the beginning of the second fishing season. After Phase 2 normal fishing operations ... such as P. granulosa. This species reaches a similar maximum size to P. spi- nosissima after 12 years (Lovrich ... within the gill cavity after hatching and may cause damage to the gills. The level of infestation ... of the fishery on these patterns; the presence and location of aggregations; the recovery of areas after intense ... Paper Title: The biology, ecology and development of fishery management advice for the anomuran ... crabs at South Georgia (CCAMLR Subarea 48.3) Abstract / Description: This review summarises the ... available information on the biology and ecology of the lithodids at South Georgia and provides an overview ... of the development of a management regime for them. Finally it aims to highlight areas in which ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 1–15 : Author(s): Belchier, M., T. Peatman and J. Brown
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Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area
were selected at the beginning, mid- dle and end of the period, then their width was measured ... of increments per zone and the mean otolith width at the end of the 100-day period estimated. Daily ... ) (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 ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Author(s): Shcherbich, L.V
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Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance index
capacity. Krill needs to be processed immediately after being caught because it starts to degrade quickly ... it was not recorded in the logbook. As it is normally about 10 min before and after towing (Japan Deep Sea Trawlers ... season starts in December and ends in November, there was a fi shing season in the early 1980s when ... until the 1992/93 season. After this, it again showed a rapid increase reaching a maxi- mum ... krill abundance index Abstract / Description: Haul-by-haul logbook catch and effort data from the ... Japanese krill fishery for the 1980/81 to 2003/04 fishing seasons were analysed. For a number of ... . The results strongly suggest that the krill fishery in the South Georgia area is operating at a ... critical level of krill availability which is just enough to maintain the best factory performance. In this ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 1–28 : Author(s): Kawaguchi, S., S. Candy, S. Nicol, K. Taki and M. Naganobu