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1. In situ target strength measurements of Antarctic zooplankton (Euphausia superba and Salpa thompsoni) at 120 khz and 200 khz, corroboration of scattering models, and a statistical technique for delineating species

   (5):2985-2988 (1993)], the TS of in-situ krill are shown to fit a deformed cylinder model [T.K ... cumulative distributions (CDF's) of Δσbs derived from the differences in abs measurements at two ... , Antarctica, during the Austral Summer of 1994. Author(s):  D.A. Demer and R.P. Hewitt (USA) Title:  In situ ... Abstract:  In-situ measurements of target strength (TS) were made of Antarctic zooplankton ...

   Meeting Document : WG-Krill-94/12 : Autor(es): D.A. Demer and R.P. Hewitt (USA)

2. Acoustic assessment of potential bias in abundance estimates of mackerel icefish from trawl surveys

   that a significant proportion of the stock occurred in midwater. If this is the case, then bottom trawl ... acoustic signal are discussed. The vertical distribution of mackerel icefish in relation to the diel light ... Abstract:  In 2000, CCAMLR asked the Working Group on Fish Stock Assessment (WG-FSA), whether ... trawl surveys are the most reliable and appropriate method to survey stocks of mackerel icefish ...

   Meeting Document : WAMI-01/05 : Autor(es): E. van Wijk, T. Pauly, A. Constable and R. Williams (Australia)

3. PRELIMINARY ESTIMATION OF PENGUIN BREEDING ABUNDANCE AT SPATIAL-SCALES OF RELEVANCE TO CCAMLR: INCORPORATING UNCERTAINTY IN COUNT DATA

   breeding population, and would only account for uncertainty in the accuracy of the count data. However, the ... work was seen as useful in illustrating both the database of penguin count data compiled for the ... Abstract:  One recommendation from the Predator Survey workshop was the undertaking of some ... estimation of SSMU-specific gentoo and Adélie breeding abundance in Area 48, and similar analyses of east ...

   Meeting Document : WG-EMM-08/53 : Autor(es): H. Lynch, R. Naveen (USA), J. McKinlay, C. Southwell (Australia), P. Trathan (United Kingdom), W. Trivelpiece, S. Trivelpiece (USA) and D. Ramm (CCAMLR Secretariat)

4. Growth and maturation of Euphausia superba Dana in northern areas of its distribution range (with reference to South Georgia and Bouvet Island areas)

   maturation rates as well as the average minimal sizes of E.superba are appreciably higher in the former than ... South Georgia area as compared to Bouvet Island. The differences in the growth and maturation rates of ... in the latter area. This is attributed to milder climatic conditions and better food supply in the ... E.superba between these two areas persist with a change of climatic epochs. During the warmer climatic epoch ...

   Meeting Document : SC-CAMLR-VIII/BG/22 : Autor(es): Delegation of USSR

5. Precision of growth band determination from eyestalk sections of Antarctic krill (Euphausia superba) preserved in formalin

   feedback management of krill fisheries. Samples stored in 70% ethanol provide an opportunity to detect the ... common in previous decades. Out of 162 Antarctic krill individuals preserved in 5% formalin, the growth ... the precision of the growth bands.Results show decreased CV and APE values and an increase in the EPA ... specimens preserved in formalin, and will benefit the stock assessment and acoustic estimation of this ...

   Meeting Document : WG-EMM-18/P16 : Autor(es): G.P. Zhu, Y. Yang, Q. Song and H.T. Zhang

6. Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts

   values of standardized CPUE indices in the Subarea 48.1 for the last 25 years. We continue to investigate ... the changes in fishing methods but is result of the influence of changing environment. Impact of ... management procedures for krill fishery in Subarea 48.1 as well as in Area 48. The source of this information ... Abstract:  In previous years we revealed that period 2006-2011 is characterized by the highest ...

   Meeting Document : WG-EMM-14/21 : Autor(es): S. Kasatkina and P. Gasyukov (Russia)

7. Analysis of variability of krill size and fish by-catch in Japanese krill fishery based on scientific observer data

   –2008 were analysed by using a hierarchical Bayesian model. The models were composed of multistage ... biological process error in the population dynamics from fishery process as observation error. In both krill ... -temporal variability in size structure of krill population, which is presumably derived from large ... variability of recruitment causing difficulty in predicting krill population dynamics. Variances of observer ...

   Meeting Document : WG-EMM-12/68 : Autor(es): T. Okuda and M. Kiyota (Japan)

8. Identification of marine Important Bird and Biodiversity Areas for penguins in South Shetland and South Orkney Islands: a comparison of two different approaches

   reported here provide a new method for the designation of a network of marine IBAs in Antarctic waters for ... on pre-existing approaches but revised according to the specific ecology of Pygoscelis penguin ... , and 2) revision of parameters for the kernel analysis (the smoothing factor and the utilization ... distribution); • We applied the revised method to 24 datasets of tracking data (three species, seven colonies ...

   Meeting Document : WG-EMM-17/35 : Autor(es): M.P. Dias, A.P.B. Carneiro, V. Warwick-Evans, C. Harris, K. Lorenz, P. Trathan

9. INTERACTIONS OF PATAGONIAN TOOTHFISH FISHERIES WITH KILLER AND SPERM WHALES IN CROZET EXCLUSIVE ECONOMIC ZONE: AN ASSESSMENT OF DEPREDATION LEVELS AND INSIGHTS ON POSSIBLE MITIGATION SOLUTIONS

   belonging to four different pods were involved in 81.3% of the interaction events. We also estimated that a ... total of 64 sperm whales interacted with the fishery on the Crozet EEZ in 2008. Significant variations ... . Based on the analyse of killer whales movements in relation to fishing vessel, when facing depredation ... longline fishery is exposed to high levels of depredation by killer and sperm whales. In this context, this ...

   Meeting Document : WG-IMAF-09/12 : Autor(es): P. Tixier, N. Gasco, G. Duhamel and C. Guinet (France)

10. ANALYSIS OF VARIABILITY OF KRILL SIZE AND FISH BY-CATCH IN JAPANESE KRILL FISHERY BASED ON SCIENTIFIC OBSERVER DATA

    hierarchical Bayesian model. The model was composed of multistage cluster units (i.e., years, subarea, vessels ... , and haul) based on a state-space model, which can separate biological process error in the population ... dynamics from observation error caused by the fishery activity and individual observation. In both krill ... variability of krill population structure and a difficulty in predicting krill population dynamics. Variances ...

    Meeting Document : WG-EMM-11/39 : Autor(es): T. Okuda and M. Kiyota (Japan)

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