Search results
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Can toothfish catches be used to predict the presence of vulnerable benthic invertebrate taxa?
of VME indicator taxa was not rare (45% of hauls caught at least one VME taxon), many individual taxa ... taxon distributions could exist, but not be detectable in catch data. One scenario is if the fishing ... locations are close enough to VMEs to attract toothfish to the baits, but far enough away that VME ... ° S 80° S 160° E 150 °E 170°E 180° 170°W 160°W 150°W Parker and Smith 90 Table 1: Explanatory ... invertebrate taxa? Abstract / Description: Accurate estimation of the impact of bottom fishing on vulnerable ... observers on New Zealand vessels during the 2009/10 Ross Sea longline fisheries to correlate toothfish catch ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 87–96 : Author(s): Parker, S.J. and M.H. Smith
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An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort
, or equal to, the precautionary assessment with some given level of confidence (for example 80%) File ... of confidence (for example 80%) ... . Vessel Starting date Ending date One 30 44 Two 60 74 Three 90 104 Four 120 134 Five 150 164 Six ... and incidental mor- tality which can be attributed to illegal fi shing. Illegal fi shing is one component of IUU ... this document. In the simplest case one would like to determine how to scale the number of observations ... which is not observed. For one defi nition of detun ectedf it could be incorporated ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Author(s): Ball, I
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Estimates of fish stock biomass around South Georgia in January/February 1985
in stock size to 10 – 20% of that estimated before the onset of heavy fishing. In C. gunnari the fishery ... is dependant on the abundance of the recruiting year class. Conservation measures adopted by CCAMLR in 1984 ... – 20% of that estimated before the onset of heavy fishing. In C. gunnari the fishery is dependant ... on the abundance of the recruiting year class. Conservation measures adopted by CCAMLR in 1984 are discussed ... to 128 ,000 t can thus partly be explained by the recruitment of one or two abundant year ... (> 35 cm) were still common, recent catches were seen domi na ted by 3 years old. fish (age class II ... - - 6 - niles (age class O and 1) the entire population had been sampled adequate- ly. In comparison ... level and was only little more than one third of the 40 000 t estimated for the virgin stock in 1975 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Author(s): Kock, K.-H.
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Beyond MSY: a consideration of definitions of management objectives
in Article II of the CCAMLR Convention. The criteria will depend on whether the main concern ... out in Article II of the CCAMLR Convention. The criteria will depend on whether the main concern ... , and as function of the two main characteristics of the fishery - the age at first capture (which may ... procedure (Beverton and Holt 1957). Typical results for North Sea plaice for two ages of first capture ... a strong year-class has just recruited and higher when it is old. This will bring the average age ... be sustained is one corresponding to full exploitation of the weaker year-classes - but a much less than full ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Author(s): Gulland, J.A.
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
large-scale oceanic strata: one in the southwest Atlantic located in the Scotia Sea, and the other ... strata: one in the southwest Atlantic located in the Scotia Sea, and the other to the north ... of krill which are used in models to estimate sustainable yield in Area 48. The survey design includes two ... . Full analysis of the results of the CCAMLR-2000 Survey will take several years and will result ... sustainable yield in Area 48. The survey design includes two large-scale oceanic strata: one in the southwest ... ; and that six hours per day would be required to sample two stations, one station would be sampled around ... ), considered to be one of the key species in the Antarctic marine food web, is prey to a wide variety ... probability of being sampled. However, one problem arising from a simple randomisation procedure ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Author(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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Book review – Biogeographic Atlas of the Southern Ocean
Paper Title: Book review – Biogeographic Atlas of the Southern Ocean Abstract / Description ... : XII + 498 pp. File: book-review.pdf ... Book review – Biogeographic Atlas of the Southern Ocean ... these gap areas is one solution, which cannot be achieved without considerable effort and expense, perhaps ... opinion due to the relative paucity of data. CCAMLR Science, Vol. 22 (2015): 45–46 45 Book review ... Committee on Antarctic Research, Cambridge: XII + 498 pp. Book review 46 The latter part of the atlas ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 45-46 : Author(s): Reid, K.
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Midwater trawl catchability as an aspect of a quantitative assessment of krill biomass conducted using a trawl census survey
. It could be proven that with two trawls operating in the same area, one could expect the coefficient Kq ... KPHJI5I. Bbl60p OnTHMaJIbHOH KOHCTPYKU,HH pa3HOr JIy6HHHoro npOMblCJIOBOrO TpaJIa MO)KeT 6blTb ... of the statistical probability theory of fishing trawls were used in theoretical research. This theory allows one ... by Samyshev and Aseev, is a midwater weighted trawl operating with one towing rope. The length of the trawl ... variable which depends on both the behavioural and distributional characteristics of the target species and ... . Mathematical modelling fishing trawls as well as hydroacoustic research on catchability properties of trawls ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 257–272 : Author(s): Kasatkina, S.M.
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A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels
operations (ICES, 2007). The duration of the interference is less than one transmit–receive period (one ... www.imos.org.au/basoop.html). However, one of the impediments that restricts the utility of such data ... noise. One method is based on a 7 × 7 convolution filter, which was subsequently used ... is that the N × N erosion filter will be invalid if there are N × N or more samples of noise retained within one slid- ing ... degraded by interference noise due to the lack of synchronisation of the acoustic instruments found on some ... of the vessels. A simple method to remove significant interference noise was introduced based on ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Author(s): Wang, X., J. Zhang and X. Zhao
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Detection and quantitative estimation of krill concentrations by hydroacoustic instruments
spread over several miles and can be registered as one or a number of layers at different depths ... at different times in the one location often differ considerably. Krill abundance measured in the day-time ... - This condition ensures reliable reception and registration by the recorder and integrator of no less than one ... . O h . l' .. 6,7) h h . h h f h' h ur t eoret~ca ~nvest~gat~ons s ow t at w~t t e use 0 ~g frequency narrow beam ... instruments was established on board the research vessel Odissey during the international expedition under the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Author(s): Yudanov, K.I.
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CCAMLR ecosystem monitoring and a feedback management procedure for krill
, the approach taken to monitor and assess the status of the ecosystem needs to be one that minimises errors ... of replicate control areas are required in addition to the experimental areas (even if only one experimental ... l'ecosysteme de la CCAMLR met au point une technique pour deceler des baisses it court terme de performance ... . r JIaBHbIM npOMbICJIOM B 30He .lleHCTBH5I KOHBeHIJ,HH AHTKOM 51BJI5IeTC5I npOMbICeJI KPHJI5I. B HaCT05lIQeH ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Author(s): Constable, A.J.