Search results
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Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics
otolith morphometrics Abstract / Description: That the predominant by-catch of grenadier by the toothfish ... , was recognised in 2010 with the identification of a new species, M. caml. Grenadier are the main by-catch ... That the predominant by-catch of grenadier by the toothfish fishery in the Ross Sea region ... with the identification of a new species, M. caml. Grenadier are the main by-catch in the toothfish fishery and modelling ... Grenadiers (Family Macrouridae) are taken as by-catch in many of the toothfish fisheries in the Southern ... are the main by-catch in the fishery for Antarc- tic toothfish (Dissostichus mawsoni) in the Ross Sea region ... (CCAMLR Subareas 88.1 and 88.2) (Stevenson et al., 2014). A by-catch of 10 tonnes of grenadiers ... ; Pinkerton and Bradford-Grieve, 2014; Mormede et al., 2014). Grenadier caught as by-catch and found ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Author(s): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott
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On the intensity of sampling krill trawl catches
Paper Title: On the intensity of sampling krill trawl catches Abstract / Description: This paper ... of adequate sample size to obtain representative krill length-frequency distributions from commercial catches ... measurements of length from commercial krill; catches should be made, as far as possible, by a single observer ... be detectable between catches. Account must be also taken of the desired biological characteristics which ... CATCHES D.G.M. Miller* Abstract This paper uses actual krilllength-frequency data in an attempt ... -frequency distributions from commercial catches. The possible effect of two other factors (within-trawl ... . Attention is drawn to the following: • all measurements of length from commercial krill catches should ... to the minimum length differences which should be detectable between catches. Account must be also taken ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Author(s): Miller, D.G.M.
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A fine-scale model of the overlap between penguin foraging demands and the krill fishery in the South Shetland Islands and Antarctic Peninsula
using the total catch of krill taken within 100 km of penguin colonies in their breeding season ... resource and is based on a detailed model of penguin foraging patterns combined with catch positions ... CCAMLR has been using the total catch of krill taken within 100 km of penguin colonies ... resource and is based on a detailed model of penguin foraging patterns combined with catch positions ... , Australia Abstract CCAMLR has been using the total catch of krill taken within 100 km of penguin ... between years, and that 75 to 90% of the total catch for the subarea was taken between December ... catch taken within this 'critical period-distance' as an indicator of the potential overlap between ... distribution of colonies and catches in more detail. They have shown that although a high percentage ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Author(s): Agnew, D.J. and G. Phegan
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Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic
pattern, occurring most often in the afternoon, while very few interactions were observed at night. Catch ... no cetaceans were present. Catch rates were slightly higher in the presence of sperm whales and it is possible ... with lower catch rates, indications are that depredation by sperm whales can lead to a decrease in catches ... . Catch rates were significantly lower when killer whales were present when compared to hauls during which ... at night. Catch rates were signifi cantly lower when killer whales were present when compared to hauls ... during which no cetaceans were present. Catch rates were slightly higher in the presence of sperm ... (toothfi sh). However, in areas with lower catch rates, indications are that depredation by sperm whales ... can lead to a decrease in catches. Some mitigation measures have been tried by vessels to reduce ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Author(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins
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Evaluation of the results of trawl selectivity experiments by Poland, Spain and USSR in 1978/79, 1981/82 and 1986/87
different characteristics of experimental codends, length frequency distribution of stocks sampled, catch ... rates and catch composition. Details of these data were analyzed and minimum mesh sizes for several ... codends, length frequency distribution of stocks sampled, catch rates and catch composition. Details ... characteristics of experimental codends, length frequency distribution of stocks sampled, catch rates and catch ... of the codends and netting used, the length distribution of fish in the stock sampled, catch rates and catch ... twine is not well defined and SF point in Figure 1 is only a rough estimate. The effect of catch ... of 2 to 3 hours resulted in some cases in large catches of 2 to 5 tonnes and thus affected the selectivity ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 163–196 : Author(s): Slosarczyk, W., E. Balguerias, K. Shust and S. Iglesias
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Diet study of Antarctic toothfish caught in the east Antarctic based on stomach content, fatty acid and stable isotope analyses
ratios were determined and compared with those of species caught as by-catch and collected from toothfish ... of Channichthyidae caught as by-catch and several species collected from toothfish stomachs, including unidentified ... as by-catch and collected from toothfish stomachs. Stomach content analyses showed that Antarctic toothfish ... toothfish were very similar to those of Channichthyidae caught as by-catch and several species collected ... ratios were determined and compared with those of species caught as by-catch and collected from ... weaken lower trophic levels by removals of fish such as grenadiers and skates as by-catch (Kock, 2001 ... of consum- ers by considering the advantages and limitations of each technique (Alfaro, 2006; Jo et al ... as by-catch and several species collected from toothfish stomachs, including unidentified icefish, Arctozenus ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 29–44 : Author(s): Park, H.J. , I. Yeon, E. Han, Y.J. Lee, S.M. Hanchet, G.W. Baeck, Y. Kwon, S.G. Choi, D.W. Lee and C.K. Kang*
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The Kerguelen database
of individual trawls, total catches and catch per species. Four species (Champsocephalus gunnari, Notothenia ... squamifrons, N. rossii and Dissostichus eleginoides) represent about 99% of the total catches. Length ... a distribution of the fishing effort, position of individual trawls, total catches and catch per species. Four ... ) represent about 99% of the total catches. Length frequency distributions of the species are also provided ... catches and catch per species. Four species (Champsocephalus gunnari, Notothenia squamifrons, N. rossii ... and Dissostichus eleginoides) represent about 99% of the total catches. Length frequency distributions ... 99% of the total catches. Some data can be presented using figures and tables ... as the main fishing grounds of the area. - 26 - The monthly total catches, catches per species, fishing ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 23-54 : Author(s): Duhamel, G.
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Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
to the isobaths and in depths down to 1 500-2 000 m. Numerically, catches were dominated by Patagonian toothfish ... (Dissostichus eleginoides), with 2 822 individuals caught (83% of total catch). Grenadiers of the genus ... Macrourus were the second most abundant taxon (248 individuals). The total catch by weight was 21.430 tonnes ... to seabed topography, species composition of catches, and relative abundance and size structure ... -2 000 m. Numerically, catches were dominated by Patagonian toothfish (Dissostichus eleginoides ... ), with 2 822 individuals caught (83% of total catch). Grenadiers of the genus Macrourus were the second most ... abundant taxon (248 individuals). The total catch by weight was 21.430 tonnes, of which D. eleginoides ... , species composition of catches, and relative abundance and size structure of D. eleginoides caught ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Author(s): López Abellán, L.J. and J.F. González Jiménez
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Otolith and body size relationships in bigeye grenadier (Macrourus holotrachys) in CCAMLR Subarea 48.3
holotrachys) caught as by-catch in the Patagonian toothfi sh (Dissostichus eleginoides) fishery in Subarea ... A large sample of otoliths from bigeye grenadier (Macrourus holotrachys) caught as by-catch ... of otoliths from bigeye grenadier (Macrourus holotrachys) caught as by-catch in the Patagonian toothfi sh ... INTRODUCTION Fish of the family Macrouridae (rattails and grenadiers) are regularly taken as by-catch ... catch by weight in these fi sheries (van Wijk et al., 2000). In other fi sheries ... ), reported macrourid by-catch is less, between 1–2% of the total catch weight. However, even ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 133–143 : Author(s): Morley, S. and M. Belchier
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Standardization of fishing effort for Champsocephalus gunnari in the South Georgia area (Subarea 48.3)
area (Subarea 48.3) Abstract / Description: Traditional calculation of catch-per-unit-effort series ... Traditional calculation of catch-per-unit-effort series is inflexible in its use of data types ... calculation of catch-per-unit-effort series is inflexible in its use of data types and has no estimate ... of information recorded in the STATLANTB form, a sequence of catch-per-unit-effort values was developed by years ... of fishing. Standardized values of fishing effort were then calculated by dividing summary catch ... by respective values of catch-per-unit-effort. This method is simple, but possesses a number of disadvantages ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 327–336 : Author(s): Gasiukov, P.S.