Resultados de la búsqueda
-
Power analyses of CEMP indices for penguins at Admiralty Bay and fur seals at Cape Shirreff and Seal Island
probability of rejecting the null hypotheses when they were, in fact, true), three periods of monitoring, and ... 21 levels of annual percent change in the CEMP indices. We conducted a number of “combined analyses ... type of overall trend. We displayed the results of our analyses in a tabular format designed to ... Abstract: We used the program MONITOR to conduct a set of power analyses for CEMP indices ...
Meeting Document : WG-EMM-03/52 : Autor(es): G.M. Watters, R.P. Hewitt, W.Z. Trivelpiece and M.E. Goebel (USA)
-
Dietary segregation of krill-eating South Georgia seabirds
ranges. selectivity by predators, or differences in escape responses of krill. For the krill-eating ... Abstract: The diets of six of the main seabird species (two petrels, two albatrosses, two ... period in 1986. For five species, Antarctic krill Euphausia superba was the main food (39-98% by mass ... . The size of the krill taken was similar between seabird species, although there were small but ...
Meeting Document : WG-EMM-97/15 : Autor(es): Prince, P.A., Croxall, J.P., Reid, K.
-
Diets of Antarctic toothfish estimated from fatty acids and stable isotopes
the particular importance of accumulation of lipid deposits in their tissue. Toothfish trophic niche ... whole population level. In contrast, the model calculations provided an estimation of dietary shift ... Antarctic toothfish, by-catch and their stomach contents were collected for the past five years in the eight ... locations of he Antarctic Waters. We investigated ontogenetic and spatial variability in resource ...
Meeting Document : WG-FSA-17/12 : Autor(es): C.-K. Kang, S.-G. Choi, J. Lee, J. Lee and D. An
-
An exact time of release and recapture stock assessment model applied to Macquarie Island Patagonian toothfish (Dissostichus eleginoides)
released fish is assigned a length of time in the available population according to its estimated release ... Abstract: This paper presents an assessment of the harvested population of Patagonian toothfish ... , catches, recaptures, natural mortality, and annual net recruitment are used to assess the population of ... one of the main fishing regions of Macquarie Island: Aurora Trough. The pre-tagging abundance is ...
Meeting Document : WG-FSA-00/43 : Autor(es): G. Tuck, W. de la Mare, W. Hearn, R. Williams, A. Smith, X. He and A. Constable (Australia)
-
Time series of Drake Passage Oscillation Index (DPOI) from 1952 to 2006, Antarctica
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... krill recruitment and density in the Antarctic Peninsula area with an environmental factor; strength of ... and density of Antarctic krill (Euphausia superba DANA) is important as variability in krill stocks ... affects the Antarctic marine ecosystem as a whole. Naganobu et al. (1999) had assessed variability in ...
Meeting Document : WG-EMM-06/13 : Autor(es): M. Naganobu and K. Kutsuwada (Japan)
-
DEVELOPMENT OF A METHODOLOGY FOR DATA QUALITY ASSESSMENT
biological sampling data from a fishing trip. In particular these measures aim to quantify the prevalence of ... in the quality of particular data sets from different trips in the Ross Sea Antarctic toothfish ... Abstract: Measures are developed which aim to summarise the quality of fishing event, catch, and ... position or time reporting errors, the diversity of catch, the extent to which catch data follow Benford ...
Meeting Document : WG-SAM-08/13 : Autor(es): D.A.J. Middleton and A. Dunn (New Zealand)
-
A von Bertalanffy growth model for Division 58.5.2 fitted to length-at-age data and a comparison of predicted with observed growth from mark–recapture data
of AGR using the MLPLB estimated VB parameters were closer to the mean trend in observed values with ... years old) to the VB model is also given in order to give more realistic predictions of mean length-at ... and showed that the bias is relatively small for the range of release lengths in the data. Predictions ... ) data used to obtain the samples of fish for ageing used length-bin sampling involving a fixed sample ...
Meeting Document : WG-FSA-SAM-06/07 : Autor(es): S.G. Candy, A.J. Constable, T. Lamb and R. Williams (Australia)
-
RESOURCES EVALUATION OF ANTARCTIC KRILL EUPHAUSIA SUPERBA DANA USING AREAL TRAWLING AND HYDRO-ACOUSTIC DATA
revealed. Standard measures for the population densities of krill in natural habitat are not available ... krill and minimizing miscalculations in evaluations of congestions. Evaluations regime applied for the ... in evaluating the density of populations. Author(s): L.A. Kovalchuk (Ukraine) Title: RESOURCES ... analyses procedures applied for trawling and hydro-acoustic sampling have to in compliance with the rules ...
Meeting Document : WG-SAM-08/P01 : Autor(es): L.A. Kovalchuk (Ukraine)
-
An evaluation of reduced target strength estimates reported for krill (Euphausia superba)
assumptions made in calculating target strength. Whether the results of these papers are valid is critically ... ) density dependent effects; and 3) compounding of diel effects. The possible bias in the calculations of ... there is 8-12 db of possible error in the calculations. This is most if not all of the difference cited ... on the same experiment and report new calculations of the target strength of krill (Euphausia superba ...
Meeting Document : WG-KRILL-90/13 : Autor(es): M.C. Macaulay (USA)
-
Distribution of Antarctic krill concentrations exploited by Japanese krill trawlers and minke whates
sectors. In early summer (December) the areas of operation for both fisheries were affected by the ... latitudinal position and shape of the pack-ice edge. Harvesting was frequently conducted in the vicinity of a ... distribution. Krill harvesting areas in the vicinity of the shelf breaks were often coincident with ... Abstract: The distribution of krill (Euphausia superba) concentrations derived from Japanese ...
Meeting Document : SC-CAMLR-VIII/BG/31 : Autor(es): Delegation of Japan