Résultats de la recherche
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2013 random stratified trawl survey
vicinity of Heard Island during April 2013. This paper provides a preliminary assessment of mackerel ... icefish population structure, abundance and yield for the area of Division 58.5.2 to the west of 79° 20’ E ... using standard CCAMLR methods. A large cohort of fish, estimated to be 3+, dominates the population in ... both abundance and biomass. Two scenarios for harvest are presented – a typical two year projection of ...
Meeting Document : WG-FSA-13/23 : Auteur(s): D.C. Welsford (Australia)
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An updated spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
population was restricted to those cells in which at least 5% of cell area was of a depth deemed suitable as ... that a proportion of the mature fish spawn each year. The model estimation of the maturity ogive is now ... similar to that estimated by histological analysis. This model represents our current best model of the ... spatial distribution and movement of Antarctic toothfish in the Ross Sea region given the movement ...
Meeting Document : WG-SAM-14/31 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Committee for Environmental Protection: 2015 Annual Report to the Scientific Committee of CCAMLR
Abstract: Cooperation between the Scientific Committee of CCAMLR (SC-CAMLR) and the Committee for ... Environmental Protection (CEP) has been steadily increasing over the last few years to the mutual benefit of ... between the Chairs of the CEP and SC-CAMLR, the report of the CEP meeting is presented to SC-CAMLR by the ... CEP Observer to SC-CAMLR and the report of the meeting of SC-CAMLR is presented to the CEP by the SC ...
Meeting Document : SC-CAMLR-XXXIV/BG/14 : Auteur(s): CEP Observer to SC-CAMLR (Dr P. Penhale, USA)
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Using effective sample sizes to evaluate the efficiency of length samples collected by at-sea observers in the krill fishery in Subarea 48.1
. Although analyses in the past have looked to the optimal design of the observer program, in terms of levels ... of coverage of vessels and hauls (e.g., Agnew et al., 2009; 2010), less attention have been focussed ... characterise how many krill are measured by observers, and for how many hauls. We then simulate the impact of ... combination (effective sample size). The median number of krill measured per haul was around 200 (range 0-652 ...
Meeting Document : WG-SAM-16/39 : Auteur(s): N. Kelly, S. Kawaguchi, P. Ziegler and D. Welsford
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Using predators and their prey to characterise the status of the marine ecosystem at South Georgia
Abstract: Increased awareness about the present status of marine systems, including those where ... fisheries target the prey of natural predators, has led to recommendations about how information on the ... status of marine predators might be used to inform ecosystem-based management approaches. In the ... Antarctic, sustained ecological research has generated long-term data on the performance of marine predators ...
Meeting Document : WG-EMM-16/28 : Auteur(s): P. Trathan, S. Fielding, S. Hill, M. Belchier and J. Forcada
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Metabarcoding analysis of zooplankton collected from Division 58.4.1 in 2014/15 using NGS platform
biodiversity of zooplankton in the Indian Ocean of Antarctica, Division 58.4.1 in 2014/15. Compared with the ... previous method, next generation sequencing (NGS) using Miseq platform produces the large amount of ... large-sized (>1 mm) and small-sized (< 1mm) fractions, respectively. Based on the low numbers of ... only if additional barcode data of small-sized zooplankton or those with soft tissue are supplemented ...
Meeting Document : WG-EMM-16/33 : Auteur(s): Delegation of the Republic of Korea
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Integrated analysis of the by-catch data in the Ross Sea toothfish fishery
Abstract: The indices of exploratory toothfish fishery in the Ross Sea for the period of 2008 ... hooks) and normalized target catch ratio. There was evidence of distinct differences in the mean (and ... the flag States, should be considered as the primary cause of the observed variability in the ... target catch ratio in the Ross Sea. The observed influence of the longline gear types (Autoline ...
Meeting Document : WG-FSA-16/13 Rev. 1 : Auteur(s): S. Kasatkina
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Analysis of the longline fishery data in the Ross Sea (SSRUs 881B, C and G)
Abstract: The analysis of the toothfish fishery data in the northern part of the Ross Sea (SSRU ... -2015. The variability of catch per haul (kg) and CPUE (kg/1000 hooks) depending on the hauling ... possible presence of number of high CPUE and catches, which are outside the upper limit of confidence ... interval of 99,7% CI. These CPUE and catch values are statistically unreliable and questionable high with ...
Meeting Document : WG-FSA-16/14 : Auteur(s): S. Kasatkina
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Independent reviews of CCAMLR stock assessments – a discussion paper
process to facilitate independent reviews of CCAMLR stock assessments (CCAMLR-XXXII, paragraph 5.14). We ... the Commission could complement the efforts of the Scientific Committee by noting the need for action ... on this topic and supporting the Scientific Committee in their development of a procedure ... as a mechanism for transparency of the stock assessment process, particularly if reports of such ...
Meeting Document : SC-CAMLR-XXXV/BG/20 : Auteur(s): Delegation of the USA
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Spawning pattern and type of fecundity in notothenioids collected around the Elephant and South Orkney Islands
Abstract: The frequency distribution of oocytes diameter and relative fecundity (FR) of 4 ... counting were carried out using an image analyzer in sub-samples of ovaries at different stages of ... development, while the determination of RF was performed by a gravimetric method. Five were the main ... distinctive finding derived from this study: (i) in mature ovaries of all species immature oocytes or pre ...
Meeting Document : WG-FSA-16/22 : Auteur(s): G. Plaza, P.M. Arana, F. Becker, A. Zavatteri and V.H. Castillo