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Interactions of Patagonian toothfish fisheries with killer and sperm whales in the Crozet Islands Exclusive Economic Zone: an assessment of depredation levels and insights on possible mitigation strategies
whales were found to be responsible for the largest part of this loss (>75%), while sperm whales had ... for the largest part of this loss (>75%), while sperm whales had a lower impact (>25%). Photo-identification ... - erogeneity in capture probability variations, was selected. After correction by the proportion of dis ... by a fishing vessel leaving the zone and use that information to find it over great dis- tances. Furthermore ... whales were found to be responsible for the largest part of this loss (>75%), while sperm whales had ... ), represents a major issue. The implications of the latter can be economic, with significant losses ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 179–195 : Author(s): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
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Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels
and the newly developed Chilean longline (a modified version of the former method to avoid fish loss by toothed ... method to avoid fish loss by toothed whales) were tested in the experiment. Spanish-system longlines ... method to avoid fish loss by toothed whales) were tested in the experiment. Spanish-system longlines ... - fish fishery (Moreno et al., 2006) to minimise fish loss to toothed whales and was recently adapted ... fishing. The Tierra del Fuego is a 53.6 m Japanese-built (1972) tuna vessel con- verted to the Spanish ... from the netting bags would be minor compared to loss of rocks from the bags. Each 8.5 kg weight ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
r i e I s l and (Lloris a n d Rucabado, 1991). Even though Yukhov (1972), based o n data from the analysis of sperm ... to the east of Isla de los Estados (55"S, 63"W). This species is also present to the north of 48"s up to 37 ... and cephalopods (Tarverdiyeva, 1972; Lloris and Rucabado, 1991; McKenna, 1991), while postlarvae and juveniles ... stages feeding on euphausiids and other zooplankters (Hart, 1946; Tarverdiyeva, 1972; Duhamel ... Paper Title: Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in ... the southwestern Atlantic Abstract / Description: The diet of Patagonian toothfish (Dissostichus ... Argentinian continental shelf/slope, the length of D. eleginoides ranged from 30 to 95 cm total length (TL ... juvenile and adult stages, and ranged between 18 and 212 cm TL. The diets of fish of various sizes and both ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Author(s): García de la Rosa, S.B., F. Sánchez and D. Figueroa
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Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994
and resourcefulness during and after the fire on board. We also honour the memories of those who died: Capitan ... . Albatross mortality and associated bait loss in the Japanese longline fishery in the Southern Ocean ... -seven line sets were observed and 98 deaths of seabirds were recorded over 20 sets; no deaths occurred ... during hauls. The 16 sets made at night contributed 15% of overall mortality, all of white-chinned ... petrels (Procellaria aequinoctialis); the four day sets contributed 85% of deaths, with giant petrels ... disproportionately affected in relation to the size of their breeding population at South Georgia when compared to ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Author(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
died out through natural mortality; (ii) it has been fished out; and (iii) it has been subject ... ) respectively. For the mark-recapture data, the tag loss rate was assumed to be zero since each tagged fish ... be sensitive to the values used for tag-loss rate and tag-detection rate. However, unlike the tagging- induced ... Paper Title: Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald ... adopted whereby the relatively long time series of catch-at-age and mark-recapture data from the main ... to 2008. A large proportion of the recaptures of fish released in this fishery were aged and these ... directly from the estimates of population numbers-at-age. The properties of these two models for estimation ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
of krill in the north east region around South Georgia is reasonable. Further stratifications were made ... offshore and is associated with the colder water regions to the east. 3.2 Kriging Analysis A simple ... , 1988). This water mass was the cooler water region to the east where the higher densities of krill ... sample region (Figure 3). 18 transects Each of the nine long transects split in the middle (Figure ... Paper Title: Analyses of acoustic line-transect data from the waters around South Georgia ... : estimation of krill (Euphausia superba Dana) – biomass Abstract / Description: A large-scale acoustic survey ... of zooplankton stocks in the waters around South Georgia was carried out during November and December ... 1981. The data have been analysed using various definitions of strata. The total biomass in the area of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Author(s): Murphy, E., I. Everson and A. Murray
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Estimates of fish stock biomass around South Georgia in January/February 1985
Pseudochaenichthys georgianus n = 1525 10 20 JO 4o so length (cm) fie;, 12: Length f'requency dis tribution ... catches were concentrated to the east and southeast of the island in divisions 61 and 62 (fig. 3 , fig ... convention area - Atlantic, Indian and Pacific Ocean sectors of the Antarctic (from 1962 to 1983 inclusive ... Paper Title: Estimates of fish stock biomass around South Georgia in January/February 1985 ... estimate stock sizes of the commercially exploited Notothenia rossii, N. guntheri, N. gibberifrons ... around South Georgia. Due to the small data base and the scarcity of comparative information the state of ... , Ch. aceratus and Ps. georgianus have been considerably affected by the fishery. Stock sizes of N ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Author(s): Kock, K.-H.
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A rationale for conservation areas within Antarctic waters
of 1970/71 to 1972/73, Gilbert and Erickson (1977) proposed six residual pack ice regions - 521 ... A (January-February, 1972) and in location B (January, 1973) enabled densities to be compared with earlier ... pack ice recorded in the summers of 1970;71 to 1972;73, Gilbert and Erickson proposed zones for seal ... ~ 5 : I I I I I I - 528 - DEGREES EAST DEGREES WEST I 20 40 60 eo 100 120 140 160 180 160 140 120 100 80 60 11 ... : The application of potential conservation measures listed in Article IX 2 of the Convention requires ... ‘the designation of regions and sub-regions based on the distribution of populations of Antarctic ... , first priority has been given to surface circulation of southern waters and the distribution of krill ... . This has been supplemented by (limited) information on the distribution of major consumers including ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 513-535 : Author(s): Chittleborough, R.G.
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Growth and age/length structure of populations of Notothenia (Lepidonotothen) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean
on the Kerguelen Shelf (1969 to 1972), and during the period reflecting the current state of the exploited ... varied from 1 to 15 years. In the first years of the fishery (1969 to 1972) primarily older aged fish ... 29.7 32.2 34.3 36.2 37.9 39.4 40.8 (1969-1972) Both sexes 20.1 23.3 26.3 29.1 31.7 34.0 36.2 38.3 ... 796 970 1148 1329 1508 (1969-1972) Both sexes 129 221 337 472 625 792 969 1152 1338 1526 ... Paper Title: Growth and age/length structure of populations of Notothenia (Lepidonotothen ... ) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean Abstract / Description ... : Age, growth and age/length composition of populations of grey rockcod (Notothenia (Lepidonotothen ... ) squamifrons), inhabiting areas of the Ob and Lena Banks and the Kerguelen Island Shelf, are presented in this ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Author(s): Zaitsev, A.K.
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Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).
the size–age structure of pop- ulations based on length-frequency distributions (Marr, 1962; Makarov, 1983 ... of E. superba range from 3 to 8 years (Marr, 1962; Makarov, 1983; Aseev, 1984; Ikeda, 1984; Candy ... . Antarctic, 22: 107–120 (in Russian). Marr, J.W.S. 1962. The natural history and geogra- phy ... Paper Title: Distribution and size–age composition of Antarctic krill (Euphausia superba) in the ... composition and biological condition of Antarctic krill (Euphausia superba) caught by the Russian krill ... distribution of size–age groups in association with particular water masses indicated that age 2+ krill ... dominated in cold Weddell Sea waters in the southern parts of the fishing area, while older age classes (3 ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Author(s): Sologub, D.O. and A.V. Remeslo