Résultats de la recherche
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VME detection thresholds: preliminary results of a study on the case of the sea pens (Pennatulacea) of the CCAMLR sector 58.4.4b
CCAMLR SAM Working Group 2018. However, despite the important level of the catches, no VME detection ... threshold triggering out the establishment of an immediate fishing exclusion zone have been reached. Here ... Workflow Status: Content Approved Document Release Consent: No Delegation responsibility for releasing ... Abstract: CCAMLR has defined Vulnerable Marine Ecosystems (VME) detection thresholds based on the ...
Meeting Document : WG-EMM-2019/52 : Auteur(s): A. Martin and M. Eléaume
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Preliminary assessment of Patagonian toothfish, Dissostichus eleginoides, in the vicinity of Heard Island and McDonald Islands (Division 58.5.2), based on a survey in May–June 2006 using the Generalised Yield Model
58.5.2 in the vicinity of Heard Island in May-June 2006 to provide the information for an assessment of ... yield for the area of Division 58.5.2 to the west of 79°20’ E using standard CCAMLR methods. It also ... length density data from the 1999 survey ii) the exclusion of year classes 6+ which have been included in ... investigates the impact on the recruitment series and predicted yields of: i) excluding the unusually high ...
Meeting Document : WG-FSA-06/45 Rev. 1 : Auteur(s): D.C. Welsford, A.J. Constable, T. Lamb and T. Robertson (Australia)
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On commercial significance of krill aggregations
operation areas and compare it with critical density values for marine animals feeding on krill. The results ... considerably exceeds a critical value of krill density for aquatic animals feeding on krill and has been ... Abstract: We made an attempt to estimate krill commercial biomass density within the fleet ... numbering 22000 hauls for the period of 1986-1990 and those from Ukrainian trawlers for the period of 2001 ...
Meeting Document : WG-EMM-03/31 : Auteur(s): S.M. Kasatkina (Russia)
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Korean research project on the ecosystem structure and function of the Ross Sea region MPA (2017–2022)
the budget for the said project for 5 years (2017-2022). The goal of the project is to understand the ... Abstract: The Ross Sea region has been known as an ecologically important area in the Antarctic ... with an extraordinary rich biota. To conserve marine living resources and the ecosystem of the Ross Sea ... Status: Content Approved Delegation responsibility for releasing documents: Korea, Republic of ...
Meeting Document : SC-CAMLR-XXXVI/BG/17 : Auteur(s): Delegation of the Republic of Korea
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Analysis of variability of krill size and fish by-catch in the Japanese krill fishery based on scientific observer data
Bayesian model. For both krill length and by-catch fish number, vessel sample size shows marked effects on ... Bayesian model. The models were composed of multistage cluster units (i.e. year, subarea, vessel, cruise ... , subareas and vessels. The potent interaction effect between year and subarea suggests large spatio–temporal ... the coefficient of variation (CV), although haul sample size affects CV for only krill length data up ... th (m m ) 60 50 40 30 20 (a) Adult size in Subarea 48.1 Overall trend Year E st im at ... Year E st im at ed m ea n le ng th (m m ) 60 50 40 30 20 (c) Adult size in Subarea ... 40 30 20 (e) Year Area Y–A Ves. Cruise Haul Ind. Va ria ... . However, extending the time on board leads to an increased financial cost for sci- entific observer ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 31–47 : Auteur(s): Okuda, T. and M. Kiyota
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Temporal variability and the interrelationships between CEMP parameters collected on Adélie penguins at Béchervaise Island
examined for Adélie penguins over a period of 12 years. Data were collected from 1990/91 to 2001/02 at ... chicks when two-thirds were crèched and fully crèched chick counts) display large temporal variability ... are critical for chick survival. There was a strong negative correlation between female foraging trip ... breeding success and foraging trip duration was low for males. Male foraging trips during the crèche period ... 90 30 / 11 / 19 90 05 / 12 / 19 90 20 / 12 / 19 90 25 / 11 / 19 90 18 / 12 ... 97 30 / 11 / 19 97 03 / 12 / 19 97 20 / 12 / 19 97 21 / 11 / 19 97 20 / 12 ... 00 04 / 12 / 20 00 04 / 01 / 20 01 30 / 11 / 20 00 14 / 12 / 20 00 13 / 2 ... chicks when two-thirds were crèched and fully crèched chick counts: CV > 30%) (Figure 2 and Table 3 ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 75–90 : Auteur(s): Emmerson, L.M., J. Clarke, K.R. Kerry and C. Southwell
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On the consequences of differentiating between adult and sub-adult survival rates in the krill-predators model
adults and sub-adults, with different survival rates for these two groups. Broadly speaking, the sub ... is unable to achieve compatibility with survival rate data for the Antarctic fur seal coupled to an ... split of the overall density dependence effect between the first year and following sub-adult years of ... Abstract: The krill-predators model is generalised by splitting post-first-year animals into ...
Meeting Document : WG-EMM-95/39 : Auteur(s): Butterworth, D.S., Thomson, R.B.
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Potential climate change effects on the habitat of Antarctic krill
Abstract: Antarctic krill is an obligate cold water species, an increasingly important fishery ... resource and a major prey item for many fish, birds and mammals in the Southern Ocean. The fishery and the ... sector into two zones: A band around the Antarctic Circumpolar Current in which habitat quality is ... that the direct effects of warming could reduce the area of growth habitat by up to 20%. The reduction ...
Meeting Document : WG-EMM-13/20 : Auteur(s): S.L. Hill, T. Phillips and A. Atkinson (United Kingdom)
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Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the Southern Ocean Atlantic sector
Peninsula and the South Shetland Islands, the data indicate a two-layered pattern based on standardised ... sector, from scientific survey trawl catches, reveals distributional patterns. For the northern Antarctic ... total biomass data and the composition of phyla that contribute to that biomass. An examination of ... . Patterns of benthic invertebrate biomass are also described for the South Orkney Islands, as well as ... averaged 17.9 m and 9.1 m respectively. The target time for a gear deployment was 30 min on the bottom ... target time for a gear deployment was 30 min on the bottom. Time on the bottom was measured by means of ... communities for com- parative purposes, with an ultimate aim of identi- fying and understanding broader-scale ... - elled into baskets. Up to 20 baskets of benthos were transferred to the sorting area for weighing ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 167–192 : Auteur(s): Lockhart, S.J. and C.D. Jones
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Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements
estimates and others can be explained by a number of factors such as: an underestimation of the range or the ... of the demand for krill by predators. Even if these low krill biomass estimates are correct, regional ... survey of the South Atlantic in January 2000 may result in an effective biomass which is greater than the ... into account when managing an expanded krill fishery, and the appropriateness of using the existing ... conducted regularly in some areas for nearly 20 years, and there is now a good appreciation of the range ... catch limit (1.5 million tonnes per year) for Area 48, based on surveys in Subareas 48.1,48.2 and 48.3 ... provide an overall range for E. superba. The range of krill distribution was estimated by joining the ... highest estimates of density from Table 2 for each region gives an overall biomass figure of 155.2 ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Auteur(s): Nicol, S., A.J. Constable and T. Pauly