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Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
Paper Title: Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the ... -at-spawning for female and male Antarctic toothfish (Dissostichus mawsoni) from fish sampled in the ... Ross Sea spanning the 2000–2009 fishing seasons. A characterisation of the oocyte developmental cycle ... of D. mawsoni shows that once development begins, oocytes grow and accumulate at the cortical alveoli ... ovaries of fish sam- pled after the spawning season (hindcasting). This evidence consists of post ... Kellermann (1991), samples with the most advanced oocyte stage of cortical alveoli (end of the primary ... difference is a result of three factors: (i) females generally begin developing when older; (ii) the female ... small fish that begin vitellogenesis later. The potential bias in hindcasting is that if remnant ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Autor(es): Parker, S.J. and P.J. Grimes
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Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish
Paper Title: Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea ... counted in estimates of total fishing removals or otherwise accounted for in stock assessment models. The ... mortality resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea ... average 208 tonnes of Antarctic toothfish mortality may be unaccounted for annually. While the current ... that these hooks were unlikely to cause further fish mortality after being lost. The following ... : Total number of hooks set before grooming, number of hooks on those sets retained after the grooming ... procedure and the proportion of data remaining after grooming by gear type. Gear Before After Proportion ... Table 1: Total number of hooks set before grooming, number of hooks on those sets retained after the ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Autor(es): Webber, D.N. and S.J. Parker
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Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys
Paper Title: Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and ... selected colonies of penguins distributed around the coasts of the South Shetland and South Orkney Islands ... distribution in Subarea 48.2, probably as a result of more variable hydrographic conditions. About 50% of the ... catch in Subarea 48.1 from December to March was taken within 40 km of the coast, and 90% within 80 km ... considered in the management of commercial harvesting. After an initially rapid expansion to 500 000 ... contours (start and end of the continental slope are shown. A = Anvers Island, B = Brabant Island, L ... DANA) CATCHES IN THE SOUTH SHETLANDS AND SOUTH ORKNEYS DJ. Agnew* Abstract A set of concentric ... zones of 20 km width was defined around selected colonies of penguins distributed around the coasts of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 287–303 : Autor(es): Agnew, D.J.
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The utilization of seabird censuses for krill monitoring
Paper Title: The utilization of seabird censuses for krill monitoring Abstract / Description ... : The possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ... krill abundance. A vector close to multi-normality was obtained, thus suggesting that refinements of the ... technique will allow the discrimination of krill levels by means of bird counts thereby providing an ... curves coming from different plots should be compared with caution after rescaling the drawings ... - 393 - THE UTILIZATION OF SEABIRD CENSUSES FOR KRILL ... MONITORING E.R. Marschoff, J.G. Visbeek and L.R. Fontana (Argentina) Abstract WG-CEMP-87/9 The ... possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ocean is ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Autor(es): Marschoff, E.R., J.G. Visbeek and L.R. Fontana
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Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the Southern Ocean Atlantic sector
Paper Title: Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the ... properties. Analysis of the benthic invertebrate megafaunal assemblages of shelf habitats within the Atlantic ... sector, from scientific survey trawl catches, reveals distributional patterns. For the northern Antarctic ... Peninsula and the South Shetland Islands, the data indicate a two-layered pattern based on standardised ... with GPS from the start to the end of bottom trawling (seabed contact), and the average trawl mouth ... BIOGEOGRAPHIC PATTERNS OF BENTHIC INVERTEBRATE MEGAFAUNA ON SHELF AREAS WITHIN THE SOUTHERN OCEAN ATLANTIC ... incorporates a range of data on physical, environmental and biological properties. Analysis of the benthic ... invertebrate megafaunal assemblages of shelf habitats within the Atlantic sector, from scientific survey trawl ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 167–192 : Autor(es): Lockhart, S.J. and C.D. Jones
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Diet study of Antarctic toothfish caught in the east Antarctic based on stomach content, fatty acid and stable isotope analyses
Paper Title: Diet study of Antarctic toothfish caught in the east Antarctic based on stomach ... content, fatty acid and stable isotope analyses Abstract / Description: To identify the major prey items ... for Antarctic toothfish (Dissostichus mawsoni) in the small-scale research unit (SSRU) 5841C in the ... between them. δ 15 N values of Antarctic toothfish were higher than for the other species collected ... freezing immediately after being extracted, and taken to the laboratory. All fish samples for FA and ... min. After cooling, 1 ml of hexane was added to the mixture. Vortexing was undertaken after capping ... min, ramping to 150°C at 30°C min–1, and holding at 250°C for 10 min after ramping at 2°C min–1. The ... cumulative prey curves for D. mawsoni started to level off after 32 stomachs (Figure 2). Fish were the most ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 29–44 : Autor(es): 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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Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys
Paper Title: Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from ... 1994 to 1997, Dr Eduardo L. Holmberg surveys Abstract / Description: The diet composition of the ... superba), followed by the amphipod hyperiid Themisto gaudichaudii, was the main food item around South ... Georgia and Shag Rocks in the period investigated, except in 1994, when the order of importance of these ... Georgia, CCAMLR INTRODUCTION mainly around South Georgia and Shag Rocks - intensively u p to the end ... survey, stomach contents were analysed qualitatively on board immediately after the catch was taken. On ... CCAMLR Science, Vol. 5 (1998): 103-123 ANALYSIS OF THE ... 1248,1010 Buenos Aires Argentina Abstract The diet composition of the mackerel icefish (Champsocephalus ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Autor(es): Barrera-Oro, E., R. Casaux and E. Marschoff
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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 ... uses actual krill length-frequency data in an attempt to address the problem of the determination of ... . The possible effect of two other factors (within-trawl variability and sample decomposition) which may ... influence length-frequency data quality is also considered. Attention is drawn to the following: • all ... the effect of elapsed time after capture (i.e., decomposition of samples) on measurements of length ... WG-KRILL-90/27 ON THE INTENSITY OF SAMPLING KRILL TRAWL ... address the problem of the determination of adequate sample size to obtain representative krill length ... -frequency distributions from commercial catches. The possible effect of two other factors (within-trawl ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Autor(es): Miller, D.G.M.
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Krill population biology during the 1991 Chilean Antarctic krill fishery
Paper Title: Krill population biology during the 1991 Chilean Antarctic krill fishery Abstract ... during krill fishing operations around the South Shetland Islands on board the Chilean factory vessel ... . The fishing ground was divided into two areas: Area A, north of the South Shetland Islands; and Area B ... , north of Elephant Island. The samples were grouped by time of capture: daytime, twilight and night-time ... WG-KRILL-92/33 KRILL POPULATION BIOLOGY DURING THE 1991 ... fishing operations around the South Shetland Islands on board the Chilean factory vessel Kirishima ... from 1.5 to 3 cm). Two subsamples of 100 specimens each were taken from 50 samples and analysed. The ... fishing ground was divided into two areas: Area A, north of the South Shetland Islands; and Area B, north ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Autor(es): Mujica R., A., E. Acuña S. and A. Rivera O.
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Seabird mortality in the Patagonian toothfish longline fishery around Crozet and Kerguelen Islands, 2001–2003
Paper Title: Seabird mortality in the Patagonian toothfish longline fishery around Crozet and ... Kerguelen Islands, 2001–2003 Abstract / Description: The legal Patagonian toothfish (Dissostichus ... eleginoides) longline fishery operating in the French Exclusive Economic Zones (EEZs) of Crozet and Kerguelen ... August 2003. Overall, the white-chinned petrel (Procellaria aequinoctialis) was the most frequently ... 58.7) at the end of the 1990s. We propose that the size of breed- ing populations, which is much ... (2005): 53–80 53 SEABIRD MORTALITY IN THE PATAGONIAN TOOTHFISH LONGLINE FISHERY AROUND CROZET AND ... Dejean, BP 400 97 458 Saint-Pierre Cedex La Réunion, France Abstract The legal Patagonian toothfi sh ... (Dissostichus eleginoides) longline fi shery operating in the French Exclusive Economic Zones (EEZs) of Crozet ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 53–80 : Autor(es): Delord, K., N. Gasco, H. Weimerskirch, C. Barbraud and T. Micol