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Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region
Paper Title: Estimation of krill (Euphausia superba) mortality and production rate in the ... data of an identical survey with RV Polarstern in 1987/88. Seasonal variation between summer and winter ... ratio of 0.88 to 0.94 for different years. The exchange rate of water masses and krill biomass within ... surveys from different years to detect the degree of interannual variation in krill abundance. The ... spawning in preceding years. From the 1987/88 age group composition a total mortality of Z = 0.96 (r ... frequencies from whale stomachs and found high abundances of 20 to 30 mm juvenile krill. These size groups ... longevity in years) Recently published results on number of krill age groups range from six groups ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Autor(es): Siegel, V.
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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
fishery in the South Shetland Islands and Antarctic Peninsula Abstract / Description: CCAMLR has been ... using the total catch of krill taken within 100 km of penguin colonies in their breeding season ... distribution of the krill fishery in Subarea 48.1 (South Shetland Islands). As this index has proven unsuitable ... of fishing in Subarea 48.1 over the period 1988 to 1991 was highly consistent between years, and ... analysis, mean foraging distance for chinstrap penguins was increased by 50% (from 20 to 30 km), although ... Macaroni 190 285 123 19 26 3 Foraging Angle -30% (percentage change in parenthesis ... extent than in subsequent years. Thus, whereas previously 1989 would have been considered an anomalous ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Autor(es): Agnew, D.J. and G. Phegan
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
in the southern Ross Sea Abstract / Description: To infer important prey resources for Antarctic ... toothfish (Dissostichus mawsoni) in the southern Ross Sea, their lipid composition was determined and ... compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected ... toothfish in February 2012. Results of fatty acid (FA) and stable isotope analyses from this study provide ... ) and 120–135 cm (D). Values are mean ± SD. 70 60 50 40 30 20 10 0 % c om po si tio n ... OCT Octopodidae Octopus 10 0 20 0 30 SZT Pogonophryne scotti Plunderfish 25 0 0 3 28 PRA Pasiphaea ... . 0 ± 0. 7 C 18 :1 n9 c 20 .2 19 .5 ± 6 .4 21 .7 ± 0 .3 14 .1 30 .1 ± 2 .8 ... Science, Vol. 20 (2013): 21–36 21 FATTY ACID AND STABLE ISOTOPE ANALYSES TO INFER DIET OF ANTARCTIC ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Autor(es): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
at a deeper range from 50 to 100 m in the day while at a shallower range from 20 to 50 m at night. In ... Paper Title: Differences in distribution and population structure of krill (Euphausia superba ... in inshore regions where krill frequently occurred but higher density areas of krill (~250 g/m 2 ... ) were rather limited. In contrast, fur seal foraging areas were found in offshore regions where krill ... , tending to be at a deeper range from 50 to 100 m in the day while at a shallower range from 20 to 50 m at ... the slope front. Subsurface current patterns (30 to 35 m depth) in the foraging areas were assessed ... (50 to 100 m) in the daytime, while at a shallower layer (20 to 50 m) at night (Figure 4). In the ... behaviour in relation to vertical distribution of kriH. 1. Animal Ecol., 54: 1-8. ICHII, T., H. ISHII and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Autor(es): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu
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Use of indices of predator status and performance in CCAMLR fishery management
Paper Title: Use of indices of predator status and performance in CCAMLR fishery management ... used in the management, by CCAMLR, of commercial fisheries. It reviews reasons why it is important for ... CCAMLR formally to use such data in its fishery management operations and discusses the constraints ... inherent in the CEMP data, both from predator monitoring and harvesting perspectives. An outline of a ... most existing fishery management agreements. A particular issue, not explicitly addressed in Article ... environment, evidence for short-term changes (year-to-year differences or trends over three to five years ... last year and with average(s) of previous years. Determine level of statistical significance of ... PERFORMANCE IN CCAMLR FISHERY MANAGEMENT J.P. Croxall Abstract This paper investigates how data on, or ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 353–365 : Autor(es): Croxall, J.P.
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A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia
successful recruitment year due to krill spawned in 1994/95. File: 06watkins.pdf ... Paper Title: A composite recruitment index to describe interannual changes in the population ... substantial differences, due in part to bias arising from a large number of krill in just one of the station ... %), while between 1994 and 1998 the number of 1+ krill found in the population increased with a very ... years, either because of changes in distribution or sampling techniques. Similarly, the larger year ... + year class only formed a significant proportion of the population in three of the seven years. This ... years in which the R2 index shows a high value (particularly 1988/89 and 1991/92) the R1 index shows ... + krill seen in the previous two years but the 2+ krill (mean size 34.2 mm) were small. It is, therefore ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Autor(es): Watkins, J.L
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ANALYSIS OF KRILL OBSERVER COVERAGE IN SUBAREA 48.3
fishing for krill in Subarea 48.3 were analysed using Variance Components Analysis. Krill mean and median ... length and larval fish bycatch were analysed. In Subarea 48.3, a partial coverage sampling programme has ... been implemented since 2002. Observers have been placed on approximately 50% of vessels fishing in any ... one season, and have been present on board for about 30% of the fishing season. They have achieved a ...
Meeting Document : WG-EMM-09/25 : Autor(es): D.J. Agnew, P. Grove, T. Peatman, R. Burns and C. Edwards (United Kingdom)
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An assessment of the impact of krill fishery on penguins in the South Shetlands
Paper Title: An assessment of the impact of krill fishery on penguins in the South Shetlands ... ) fishery and penguins during the penguins' breeding season (December to March) in the South Shetland ... krill catch is very low in December while the catch rate for the following three months is roughly ... constant (3 000 to 10 000 tonnes/10-day period) due to an increase in fishing intensity in areas closer to ... 20 or 30 X 30 n miles from recent surveys (1989/90 and 1990/91). The krill biomass for each of ... about 3 to 25 km offshore, irrespective of annual conditions, i.e., even in a krill-poor year (AMLR ... IMPACT OF THE KRILL FISHERY ON PENGUINS IN THE SOUTH SHETLANDS T. Ichii, M. Naganobu and T. Ogishima ... penguins' breeding season (December to March) in the South Shetland Islands (Subarea 48.1) was made based ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Autor(es): Ichii, T., M. Naganobu and T. Ogishima
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Assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3
recent years. Projections indicate that a constant catch of 2,420 tonnes in the 2020 and 2021 seasons ... Abstract: Assessment of the Patagonian toothfish (D. eleginoides) in Subarea 48.3 indicates that ... the current status of the stock is at 50% of B 0. Spawning biomass has been relatively constant in ... toothfish (Dissostichus eleginoides) in Subarea 48.3 Microsoft Word File: fsa-2019-28.docx Approval ...
Meeting Document : WG-FSA-2019/28 : Autor(es): T. Earl
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Mitigation of seabird captures during hauling in CCAMLR longline fisheries
/ Description: In recent years there has been an increased focus on reducing seabird captures that occur during ... Paper Title: Mitigation of seabird captures during hauling in CCAMLR longline fisheries Abstract ... hauling in CCAMLR longline fisheries. Haul captures were first recognised by CCAMLR as a problem as early ... MRAG Ltd 18 Queen Street, London W1J 5PN United Kingdom Abstract In recent years there has been an ... BEDs have been used in fisheries in Division 58.5.2 over the period of three years. Discussion ... operations in Divisions 58.5.2 and 58.4.2. During that year, although there was zero mortality recorded dur ... MITIGATION OF SEABIRD CAPTURES DURING HAULING IN CCAMLR LONGLINE FISHERIES E. Reid BirdLife International ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 155–162 : Autor(es): Reid, E., B. Sullivan and J. Clark