Résultats de la recherche

1. Impact of predation by Cape fur seals Arctocephalus pusillus on Cape gannets Morus capensis at Malgas Island, Western Cape, South Africa

   000 in 2005/06. This amounted to about 29%, 83% and 57% of the overall production of fledglings at the ... sustainable. There was a 25% reduction in the size of the colony, the second largest of only six extant Cape ... increase in the seal population and altered management of the islands. At Malgas Island, most gannet ... (Morus capensis) fledglings around Malgas Island in the 2000/01 breeding season, 11 000 in 2003/04 and 10 ...

   Meeting Document : WG-EMM-06/9 : Auteur(s): A.B. Makhado, R.J.M. Crawford and L.G. Underhill (South Africa)

2. Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia

   (Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ... . frigida) in 2000. There was no clearly dominant prey group in 1999. The five-year average proportion of E ... frequency occurrence of T. gaudichaudii both increased with a decreasing proportion of E. superba in the ... gross energy content of individual meals was often above average in years when the diets contained fewer ...

   Meeting Document : WG-EMM-12/17 : Auteur(s): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)

3. Antarctic icefishes (Channichthyidae) – a unique family of fishes – a review

   haemoglobin. With the exception of one species, icefish live only in the cold – stable and oxygen – rich ... environment of the Southern Ocean. It is still questionable how old icefish are in evolutionary terms: they ... – winter. The incubation period spans from 2 months in the north of the Southern Ocean to more than 6 ... Abstract:  Icefish are a family of species unique among vertebrates in that they possess no ...

   Meeting Document : WG-FSA-04/10 : Auteur(s): K.-H. Kock (Germany)

4. Congruent, decreasing trends of Gentoo Penguins and Crozet Shags at sub-Antarctic Marion Island suggest food limitation through common environmental forcing

   ] melanogenis breeding annually at Marion Island, one of South Africa’s Prince Edward Islands in the south-west ... the compositions of their diets. Therefore, trends in their populations may be driven by food ... between the mid-1990s and the mid-2000s, exhibited a partial recovery in the late-2000s and then decreased ... to their lowest recorded levels in 2012/13. In both instances, the partial recoveries in the late ...

   Meeting Document : WG-EMM-14/P09 Rev. 1 : Auteur(s): R.J.M. Crawford, B.M. Dyer, L. Upfold and A.B. Makhado

5. Effect of a shore-based sampling program on Notothenia coriiceps populations

   summers of 1992/93 to 1994/95 at one specific zone (site 1) with those taken in the same last summer at ... in length (TL) of the fish was observed throughout the whole period. The fish from sites 2 (x=32.4 cm ... than those from site 1 caught in the summers of 1994/95 (x=28.8 cm) and 1993/94 (x=30.2 cm), but were ... similar in size to those sampled in the summer of 1992/93 (x=31.7 cm), just when the sampling programme ...

   Meeting Document : WG-FSA-99/24 : Auteur(s): R. Casaux and E. Barrera-Oro (Argentina)

6. Monitoring a marine ecosystem using responses of upper trophic level predators

   offspring growth tended to explain the greatest proportion of the variability in the CSI and this was ... 1977 and 1998. There was no trend in the CSI from variables representative of foraging conditions ... acute but transient variability that is amplified in the response of upper-trophic level predators ... . There is less certainty that trends in populations are a consequence of shifts in the degree to which ...

   Meeting Document : WG-EMM-01/25 : Auteur(s): I.L. Boyd and A.W.A. Murray (United Kingdom)

7. 30 years of krill fisheries management – challenges remain

   concern since key spawning, recruitment and nursery areas of krill are located in the Southwest Atlantic ... sector, an area that has been warming rapidly, resulting in a reduction in the extent and duration of ... establishment of CM 51-07 – distributing the trigger limit among statistical subareas – was a step in the right ... frequently. The reproduction and survival of krill are significantly affected by sea ice cover. This is of ...

   Meeting Document : CCAMLR-XXX/BG/19 : Auteur(s): Submitted by ASOC

8. Review of fishery monitoring and forecast procedures

   closed 68 fishing areas, and the total catches of Dissostichus in areas closed using the forecast model ... will be inaccurate. A range of management options are considered in response to a catch overrun. The ... Abstract:  The Secretariat monitors the catches of all target and by-catch species (or species ... averaged 98.5% of the relevant catch limits. The forecast model relies on the assumption that the fishery ...

   Meeting Document : WG-SAM-13/06 : Auteur(s): Secretariat

9. POPULATION ASSESSMENTS OF GENTOO PENGUINS (PYGOSCELIS PAPUA) BREEDING AT AN IMPORTANT ANTARCTIC TOURIST SITE, GOUDIER ISLAND, PORT LOCKROY, PALMER ARCHIPELAGO, ANTARCTICA

   Abstract:  Goudier Island is located in the Palmer Archipelago, to the west of the Antarctic ... Peninsula; it is one of the most frequently visited tourist sites in Antarctica. A number of gentoo penguin ... six visited colonies, two showed an important and significant statistical decline in the number of ... (Pygoscelis papua) breeding colonies are located on the island and these have been the focus of one of the ...

   Meeting Document : WG-EMM-09/P07 : Auteur(s): P.N. Trathan, J. Forcada, R. Atkinson, R.H. Downie and J.R. Shears

10. Linking population trends of Antarctic shag (Phalacrocorax bransfieldensis) and fish at Nelson Island, South Shetland Islands (Antarctica)

    in the number of breeding pairs of Antarctic shag Phalacrocorax bransfieldensis  in two colonies on ... , respectively, with both factors adversely affecting the population trends of this bird. In line with these ... influenced by the concomitant decrease in abundance of two of their main prey, the nototheniids Notothenia ... the 1990s up to the mid 2000s over an overall monitoring period of over two decades. It addresses ...

    Meeting Document : WG-EMM-16/P09 : Auteur(s): R. Casaux and E. Barrera-Oro

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