Resultados de la búsqueda
-
Movement and growth of tagged toothfish around South Georgia and Shag Rocks (Subarea 48.3)
Abstract: In 2000 the UK started a toothfish (Dissostichus eleginoides) tagging programme. The ... of the fish recaptured to date were tagged and released during the experimental pot fishing in 2000 ... the same longline vessel in 2002 after up to two months at liberty. The fish tagged during the ... recaptures of these fish tagged at South Georgia or elsewhere in the South Atlantic. Similarly, tags ...
Meeting Document : WG-FSA-02/28 : Autor(es): T.R. Marlow, D.J. Agnew and I. Everson (United Kingdom)
-
CCAMLR measures regulating the tagging of Dissostichus species, metrics used to assess vessel tagging performance, the potential for some anomalous results, and general recommendations on tagging; a view from the hauling room
species) in exploratory fisheries carried out within the Convention Area are described. Following the ... first season of implementation we describe several circumstances which will cause anomalies in the tag ... overlap statistic used to monitor tagging performance. These relate to differences in the length ... distribution of Dissostichus species within the assessed management division (ASD) or changes in the tagging ...
Meeting Document : WG-FSA-11/50 : Autor(es): J.M. Fenaughty (New Zealand) and J. Brown (United Kingdom)
-
DRAFT SOFTWARE USER GUIDE FOR: ICESCAPE: INTEGRATING COUNT EFFORT BY SEASONALLY CORRECTING ANIMAL POPULATION ESTIMATES
in the R language for statistical computing (R Development Core Team 2008), aims to adjust raw count ... data for availability and perception bias, and account for sampling fractions less than unity, in order ... conditions. In Antarctica, adjustment for availability is particularly important, because difficulties in ... accessing breeding sites often lead to counts of land-breeding predators being taken at suboptimal times in ...
Meeting Document : WG-SAM-09/16 : Autor(es): J. McKinlay, C. Southwell and R. Trebilco (Australia)
-
Histopathology of Antarctic krill, Euphausia superba, bearing black spots
superba, since January, 2001. To study the nature of the black spots, the krill were sampled in the winter ... of 2003, 2006, and 2007 in the South Georgia region, the Antarctic Ocean. Histological observations ... bacteria or amorphous material. In the 2007 samples, 42% of the krill had melanized nodules. Most of the ... genes. More than three bacterial species or strains were also confirmed by in situ hybridization for 16S ...
Meeting Document : WG-EMM-08/P09 : Autor(es): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu
-
UPDATED BIOLOGICAL PARAMETERS FOR THE ANTARCTIC STARRY SKATE, AMBLYRAJA GEORGIANA, FROM THE ROSS SEA
Abstract: Photographs of skates taken by observers on New Zealand toothfish longliners in the ... examined in the laboratory. There was no significant difference between the median length at maturity for ... of these were returned in good condition and were considered likely to survive. Estimates of the ... proportion released in good condition are in the range 50–80%, depending on assumptions about whether skates ...
Meeting Document : WG-FSA-08/20 : Autor(es): M.P. Francis and S. Mormede (New Zealand)
-
Important aspects of prey distribution for the formation of foraging areas of chinstrap penguins and Antarctic fur seals at Seal Island
. Chinstrap penguins foraged in two modes during chick-brooding period: daytime foraging chinstrap penguins ... foraged in the inshore region, while overnight foraging penguins foraged in the slope region. It was ... difficulty in perceiving prey at night. Antarctic fur seals foraged mostly in the slope/offshore region ... during pup-rearing period. It was suggested that important factors may be mainly 4) and 6). In conclusion ...
Meeting Document : WG-EMM-97/28 : Autor(es): Bengtson, J.L., Hiruki, L.M., Naganobu, M., Ichii, T., Meyer, W.R., Cameron, M.F., Boveng, P., Takao, T., Miura, A., Jansen, J.K., Kawaguchi, S., Hayashi, T.
-
A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward Islands
at the Prince Edward Islands was conducted during December 2008, repeating a previous survey in ... supported twice as many non-breeding birds. Burrowing petrels comprised 96% of prey in skua middens at ... coverage in 2008, whereas the number of skua nests on Marion Island was barely half that counted in 2001 ... , continuing an apparent decrease in this species at Marion Island since the 1980s. There is no evidence that ...
Meeting Document : WG-EMM-10/P03 : Autor(es): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
-
Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys
Abstract: The current CCAMLR protocol specifies daytime acoustic sampling in order to avoid ... issues of diel changes in acoustic scattering strengths. However, due to logistic constraints, acoustic ... a regular basis deployed stationary platforms in the main area for commercial krill harvesting at ... the South Orkney Islands since 2014, and in this report some of these data have been analysed in order ...
Meeting Document : WG-EMM-2019/32 : Autor(es): T. Klevjer, G. Skaret and B.A. Krafft
-
The living planet index
Abstract: UNEP-WCMC is developing further an approach for measuring and communicating trends in ... biodiversity captured in the Living Planet Index. The Index is based on average trends in populations of ... several hundred vertebrate species from around the world, and UNEP is interested in including CCAMLR data ...
Meeting Document : WG-EMM-04/16 : Autor(es): Secretariat
-
Diets of sympatrically breeding Adélie, gentoo and chinstrap penguins from Admiralty Bay, South Shetland Islands, Antarctica, 1981 to 2000
-annual variability in mean food load sizes during chick rearing and there was a high degree of coherence ... among the three species in the years of high versus low food loads. Adélie and chinstrap penguin adults ... experienced significant declines in body weight during the chick provisioning period in several of the latter ... Living Resources (AMLR) marine surveys in the area. Finally, we examined the digested portion of the ...
Meeting Document : WG-EMM-03/29 : Autor(es): W.Z. Trivelpiece (USA), K. Salwicka (Poland) and S.G. Trivelpiece (USA)