Resultados de la búsqueda
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Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels
Exclusive Economic Zones: an assessment of depredation levels Abstract / Description: Interactions between ... whales. These two species, alone or in co-occurrence with each other, were observed in 71% of the 1 308 ... two species, alone or in co-occurrence with each other, were observed in 54% of the 6 262 longlines ... monitored. Interactions were observed in all fishing areas. The effect of depredation was assessed by ... event during which animals of both species were reported at least once during the same haul. The rate ... 2005 C um ul at ed e ff ec ti ve s of id en ti fi ed in di vi du al s 2003 ... fi sheries: modalities of opportunistic feeding for bottlenose dolphins at Lampedusa Island (Italy ... EXCLUSIVE ECONOMIC ZONES: AN ASSESSMENT OF DEPREDATION LEVELS C. Roche and C. Guinet CEBC-CNRS, UPR 1934 ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Autor(es): Roche, C., C. Guinet, N. Gasco and G. Duhamel
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
Paper Title: Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR ... conducted from September to October 2006 in the northern part of the Kerguelen Plateau (CCAMLR Statistical ... stratified stations. Estimates of biomass and abundance were produced for eight commercial species. The total ... biomass was 245 000 tonnes and Patagonian toothfish (Dissostichus eleginoides) accounted for half of the ... included in CCAMLR Statistical Division 58.5.1. The zone is located at the northern tip of the Kerguelen ... at South Georgia (Kock, 1992). The discovery of a deep-sea stock of Patagonian tooth- fish ... . The krigeage method used was the point kriging, which estimates the values of the points at the grid ... on Everson’s scale with modes at 35 and 38 cm, ages 4 and 5, 4.78 million specimens, 22.5% of fish ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Autor(es): Duhamel, G. and M. Hautecoeur
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Whales: Trophic modelling of the Ross Sea
. Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... methods to estimate the food requirements of cetaceans in the Ross Sea. At the outset, it is important to ... more intensively in the Antarctic in summer than at other times of the year. Reilly et al. (2004) and ... about 120 d/y and consume at a rate approximately 1/10 th of this at other times of the year. In this ... toothed whales is more intense in the summer in the Antarctic than in other areas at other times of the ...
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By-catch, growth and feeding of Antarctic juvenile fish taken in krill (Euphausia superba Dana) fisheries in the South Georgia area, in 1992
Paper Title: By-catch, growth and feeding of Antarctic juvenile fish taken in krill (Euphausia ... an investigation of juvenile Antarctic fish caught during krill fishing by the FV Grigory Kovtun in ... : Champsocephalus gunnari and Nototheniops larseni. The frequency of occurrence of juvenile fish was 18.2% when all ... krill tows were included and 45.5% when only tows made in shelf waters were considered. The abundance of ... between them. At present, as our data on the by-catch of juvenile fish are very limited, it is difficult ... the waters outside the continental shelf. Future research should thus be directed at the study of ... the juvenile stock at age l+ and the rate of natural mortality concurrently with the total taken as ... of the nearshore fish populations at South Georgia. Br. Antarct. Surv. Bull., 59: 63-74. CCAMLR ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 129–142 : Autor(es): Pakhomov, E.A. and S.A. Pankratov
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
Paper Title: Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae ... Chilean fisheries of the Patagonian toothfish, Dissostichus eleginoides is reviewed in order to study ... selectivity of different types and sizes of hooks used in longlines. Original data obtained during 1991 off ... the coast of Valdivia, South East Pacific, are also taken into consideration. The data show that ... hooks. In spite of the finding that differences in length composition of fish caught at the same ... , a proportion of females and their length is also increased in catches taken at greater depth. Due ... OF DISSOSTICHUS ELEGINOIDES (NOTOTHENIIDAE) OFF THE CHILEAN COAST Carlos A. Moreno* Abstract ... Existing information from technical publications on Chilean fisheries of the Patagonian toothfish ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Autor(es): Moreno, C.A.
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Cephalopods: Trophic modelling of the Ross Sea
. Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... into one compartment. Lack of adequate biomass, growth and feeding parameter data at the moment for ... similar to that of the Prydz Bay area at 68°S 75°E (Lu & Williams 1994). Lu & Williams (1994) found that ... . Galitheuthis glacialis: At least two size classes of Galitheuthis glacialis were also caught in Prydz Bay, but ... released one or two at a time. The numbers of eggs produced are known only for a few species. It is ...
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Seals: Trophic modelling of the Ross Sea
. Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... , relatively little is known of their biology (Kooyman 1981a). Mating and birth are likely to occur at sea or ... . Further research using stable isotope analysis of blood samples from seals not at the breeding colonies ... , and samples of muscle or other slower-turnover tissue of seals at the breeding colonies may be ... larger than males. Based on a small sample of measured animals, Ross seals reach at least 2.4 m and have ...
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Bacteria and detritus: Trophic modelling of the Ross Sea
. Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... sea-ice at that time of year is transferred into the water column. It is assumed that the living ... -parasite load), as well as parts of animals that died due to predation but were not consumed at the time ... ). Concentrations of bacteria were typically highest at the surface, decreasing to low levels at c. 300 m ... al. (1997) found that at some times only ~10% of bacteria cells were viable. 0 0.5 1 1.5 2 ...
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Benthos: Trophic modelling of the Ross Sea
. Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... and lack of calibration of numbers to biomass are at the base of difficulties in arriving at ... unevenly distributed at a range of spatial scales, depending on factors including substrate, water depth ... 85 ind m-2 occur at between 4–15 m (Stockton 1984). Typical dry weights of tissue of individuals are ... exceedingly high densities of the infaunal bivalve Laternula elliptica that have been found at Faraglione ...
Document : Site Section: Publications
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Location and intensity of the Soviet krill fishery in the Elephant Island area (South Shetland Islands), 1988/89
Paper Title: Location and intensity of the Soviet krill fishery in the Elephant Island area ... from 21 November 1988 to 25 March 1989. Although the total catch of the USSR in this season reached a ... low. In 1988/89 only one standard fishing vessel operated in the area over 40% of the time. The ... highest catch-per-unit-effort was observed in January 1989 (7.7 tonnes per hour of trawling on average ... computer database: • date, time and haul duration; • coordinates at start of haul; • vessel course and ... towing speed; • haul depth; and • catch per haul. At present the database consists of information on ... /days per five-day period at the end of February to March 1989. Such a level of fishing effort would ... caught in the nearshore zone of Subarea 48.1 at the current rate is comparable with the total amount of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 305–335 : Autor(es): Sushin, V.A. and A.S. Myskov