Résultats de la recherche
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Book review: Fish and Fish Resources of the Antarctic
began regular, largescale multidisciplinary studies here in the early 1960s. Starting from the first ... research expeditions in Antarctica. The introduction notes that until the 1960s Antarctic waters were still ... Antarctic Research), and later, after the coming into force of the Convention on the Conservation of ... here in the early Starting from the first South Atlantic expedition carried out by the research ... for the future harvesting of fish stocks based on the fisheries potential of areas with high ... of areas with high fish productivity and to allocate areas according to the numerical dominance of ... with high abundance and population biomass are represen- tatives of only two local families ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 165–168 : Auteur(s): Shust, K.V
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Biological characteristics of Antarctic fish stocks in the southern Scotia Arc region
sexual maturity and length at first spawning in Champsocephalus gunnari was one year later on the ... takes one year or more, whereas in others gonad maturation was completed within one season. Length at ... , despite substantial catches in the first four years of the fishery and ample opportunity to sample these ... catches. The only scientific surveys of these stocks during these years were conducted by Germany in 1985 ... with large variations from year to year (Kock, 1989b; Everson et al., 1996). Previous investigations ... ~psoceplzaltis gtinnari was one year later on the southerly grounds than at South Georgia. The distribution of ... Charnpsocephalus gunnari and later the nototheniid Patagonotothen gtintheri around Shag Rocks, with some of the ... for some years in the late 1980s. Since the early 1990s, the fishery was almost exclusively a ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 1–41 : Auteur(s): Kock, K.-H., C.D. Jones and S. Wilhelms
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The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
the low Antarctic were made in the late 1970s/early 1980s. Those estimates were constrained by a ... were extended to the mesopelagic realm and the high-Antarctic Zone in the late 1980s and early 1990s ... nototheniids, and that the importance of krill in fish diets varies substantially both with time and location ... on various scales, as well as with the availability of alternate prey in the different regions in the ... of sexually mature 3–4-year-old E. carlsbergi while south of the APFZ 2–3-year- old immature fish ... in the late 1970s/ early 1980s. Those estimates were constrained by a paucity of biomass estimates ... mesopelagic realm and the high-Antarctic Zone in the late 1980s and early 1990s when these areas were ... , and that the importance of krill in fish diets varies substantially both with time and location on ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Auteur(s): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams
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A rationale for conservation areas within Antarctic waters
) within a unit. To date, apart from an early effort to identify separate stocks of whales (discussed ... separating demersal fishing operations on discrete banks and shelves. with the increasing emphasis now on ... each fishing country in the near future". While a rather arbitrary separation into a number of major ... distribution of a key food species, are consistent with the distribution of the major consumers. The ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 513-535 : Auteur(s): Chittleborough, R.G.
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A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands
as significant. The material for the current study was obtained with trammel nets at Potter Cove ... species in relation to Notothenia neglecta, a species with similar ecological habits in the fjords. Since ... depletion of the stocks due to commercial exploitation in the area in the early 1980s. File: 15-Barrera-Oro ... , King George/25 de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half ... number of specimens of N. neglecta. Differences between years have been tested with a nested ANOV A ... material for the current study was obtained with trammel nets at Potter Cove, King George/25 de Mayo 1 ... Notothenia neglecta, a species with similar ecological habits in the fjords. Since sampling by this method ... stocks due to commercial exploitation in the area in the early 1980s. Resume La tendance au declin ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Auteur(s): Barrera-Oro, E. and E. Marschoff
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A review of the diet and at-sea distribution of penguins breeding within the CAMLR Convention Area (submitted to the 2008 Joint CCAMLR-IWC Workshop)
(Cherel, 2008). Diet could vary through the trip owing to areas with different prey availabilities being ... from wind. Kooyman and Ponganis (2007) fitted 10 juveniles with PTTs on their first trip from the ... associated with each approach. It then proceeds to review all published information on the diet and at-sea ... useful for comparison with the findings of their own stud- ies, to identify important gaps in current ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 75–114 : Auteur(s): Ratcliffe, N. and P. Trathan
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Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region
Meteor along the Antarctic Peninsula from 26 December 1989 to 14 January 1990. Results were compared with ... data of an identical survey with RV Polarstern in 1987/88. Seasonal variation between summer and winter ... ratio of 0.88 to 0.94 for different years. The exchange rate of water masses and krill biomass within ... ). Abundance was higher during the post-spawning season 1984/85 with 3 795 x 109 krill and highest in early ... = -0.999) was calculated, which corresponds with a survival rate of 38 % from one year to the next. The ... of a species with a multi-year life-cycle can be obtained by summing up the results for single age ... -age data with a two to three year life cycle will, however, strongly affect the results by increasing ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Auteur(s): Siegel, V.
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Results of Soviet investigations of the distribution and ecology of pelagic squids (Oegopsida) in the Southern Ocean
total of 326 squid specimens were collected at 124 stations with sampling by midwater nets. 125 ... stomachs. All species are divided into three major groups in accordance with their habitats: tropico ... specimens of that total were identified as Brachioteuthis riisei. In recent years (1978-1984) the collection ... " started in 1962) were fruitless in this respect and until now no specimens have been caught with the ... fauna (Oegopsida) in the Antarctic. Later, in late Miocene-early Pliocene, the Antarctic was separated ... -1977 a total of 326 squid specimens were collected at 124 stations with sampling by 1nidwater nets ... found in sperm whale stomachs. All species are divided into three major groups in accordance with ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 79-111 : Auteur(s): Lubimova, T.G.
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Temporal variability and the interrelationships between CEMP parameters collected on Adélie penguins at Béchervaise Island
Béchervaise Island, Eastern Antarctica. Parameters relating to chick survival (brooding nest counts, counts of ... . The low degree of correlation between parameters collected before incubating nest counts with those ... are critical for chick survival. There was a strong negative correlation between female foraging trip ... breeding success and foraging trip duration was low for males. Male foraging trips during the crèche period ... success was negatively correlated with female foraging trip duration during the guard phase. Their ... - incubation count of all nests with eggs, brooding nest count during early guard/late incubation, a chick ... with male crèche foraging trip duration (r = -0.64). In general, the CVs for the additional CEMP ... Breeding success at Béchervaise Island was found to be strongly correlated with parent forag- ing trip ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 75–90 : Auteur(s): Emmerson, L.M., J. Clarke, K.R. Kerry and C. Southwell
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CCAMLR ecosystem monitoring and management: future work
managing fisheries with the maintenance of ecological relationships included in the conservation objectives ... for dealing with uncertainty. This paper reviews progress in developing ecosystem-based management ... scale during the early stages of the fi shery and to 0 1 2 3 0 1 2 3 D en si ty 0 10 20 30 ... 40 50 60 Year 0 1 2 3 (a) (b) (c) Figure 2: Potential effects of fi shing on krill density ... its ecosystem approach to managing fi sheries with the maintenance of ecological relationships ... agreed objectives, and (iv) methods for dealing with uncertainty. This paper reviews progress in ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Auteur(s): Constable, A.J