Search results
-
Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (CCAMLR Subarea 48.3), Antarctica, during austral winter from 2002 to 2008
. anderssoni and G. nicholsi from larvae to adults were found, suggesting that these species may have their ... samples. Additionally, the size distribution of P. choriodon was unimodal, indicating that individuals in ... warmer areas. Author(s): T. Iwami, M. Naganobu, K. Taki and M. Kiyota (Japan) Title: Annual changes in ...
Meeting Document : WG-EMM-10/22 : Author(s): T. Iwami, M. Naganobu, K. Taki and M. Kiyota (Japan)
-
Variation in the diet of the blue-eyed shag Phalacrocorax atriceps throughout the breeding season at Half-Moon Island, South Shetland Islands
important in mass (79%), followed by N. nudifrons and T. newnesi. The overall composition of the diet was ... qualitatively and quantitatively similar to that reported for the 1992/93 austral summer at the same colony ... . However, the pellet analysis throughout the 1993/94 breeding season showed that large N. coriiceps were ...
Meeting Document : WG-EMM-95/78 : Author(s): Barrera-Oro, E., Casaux, R.
-
An iterative model to construct an age-length key to assess the age composition of a new fishery for Dissostichus eleginoides in Chilean waters
Abstract: Traditional calculation of catch age composition estimate requires that the age-length ... data and random length frecuency be sampled from the same population, in other case an age-length key ... with the aplication of a single age-length key to all monthly length distribution using the nonlinear ...
Meeting Document : WG-FSA-92/23 Rev. 1 : Author(s): H. Robotham V. and Z. Young U. (Chile)
-
Interannual variation to the gonad cycle of the mackerel icefish
Abstract: Spawning by Antarctic fish is generally considered to be seasonal and restricted to a ... brief period during the autumn and winter. Arising from this it has been assumed that the gonadal ... variation are discussed with respect to feeding conditions. Author(s): I. Everson (United Kingdom), K.-H ...
Meeting Document : WG-EMM-00/45 : Author(s): I. Everson (United Kingdom), K.-H. Kock (Germany) and J. Ellison (United Kingdom)
-
Monitoring a marine ecosystem using responses of upper trophic level predators
level predators that specialise in foraging upon krill (Eupuasia superba Dana). These variables included ... index (CSI). 2. Sensitivity analyses showed that missing values had a large effect upon the accuracy of ... . Individual variables had widely varying influence upon the CSI but, in general, those with longer time series ... had the greatest influence. 3. Principal components analysis showed that variables representing ...
Meeting Document : WG-EMM-01/25 : Author(s): I.L. Boyd and A.W.A. Murray (United Kingdom)
-
Risk maps for Antarctic krill under projected Southern Ocean acidification
development even if the embryos are transferred to seawater with current levels of CO 2. Krill embryos appear ... -dimensional circumpolar projection of future p CO 2, predict that by 2100 the Weddell Sea and the waters to ... south of the Polar Front is predicted to be unsuitable for hatching by the year 2300, which would lead ... to collapse of the krill population. This is the first report that explores the circumpolar impacts ...
Meeting Document : WG-EMM-14/P06 : Author(s): S. Kawaguchi, A. Ishida, R. King, B. Raymond, N. Waller, A. Constable, S. Nicol, M. Wakit and A. Ishimatsu
-
Density and biomass of Antarctic krill around South Shetland Islands using by 2-dB difference method
peripheries (33.8), with the length of the aggregations exceeding their height. It was evident that most krill ... backscattering strength (Sv) frequencies (38 and 120 kHz), a clear acoustic distinction could be made between ... of the South Shetland Islands (64.5) was higher than that in the south (35.9) and the Elephant Island ...
Meeting Document : SG-ASAM-17/04 : Author(s): S.-G. Choi, K. Lee and D. An
-
Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island data set
the Pacific water is encountered, there are indications of vigorous mixing processes of Bransfield Straits ... is associated with abundant Krill populations. It is speculated that mixing of Weddell and Pacific waters near ... the Pacific water is encountered, there are indications of vigorous mixing processes of Bransfield Straits ... is associated with abundant Krill populations. It is speculated that mixing of Weddell and Pacific waters near ...
Meeting Document : SC-CAMLR-VII/BG/19 : Author(s): United States of America
-
Decline of Antarctic fur seal (Arctocephalus gazella) population at SSSI No. 32, South Shetlands, Antarctica, during 1997/98: a discussion of possible causes
Abstract: Little is known of what happened after the exploitation period with the population of ... date logistic model that describes pup population increase from 1965/66 to 1997/98. During this last ... also lower than last year. We hipothesize that large scale fluctuations in physical oceanographic ... be changing krill abundance and distribution, in turn affecting local predator reproductive ...
Meeting Document : WG-EMM-98/17 : Author(s): R. Hucke-Gaete, D. Torres, A. Aguayo and V. Vallejos (Chile)
-
Growth and shrinkage in Antarctic krill Euphausia superba is sex-dependent
period is critical to their success. Laboratory evidence suggests that krill may shrink in body length ... during this time in response to the low availability of food. Nevertheless, verification that krill can ... and compared our results with those obtained from a combination of science and commercial sampling ... of the ovaries and is not necessarily an outcome of winter hardship. The sex-dependent changes that ...
Meeting Document : WG-EMM-16/P04 : Author(s): G. Tarling, S. Hill, H. Peat, S. Fielding, C. Reiss and A. Atkinson