Résultats de la recherche
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Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
the isobaths and in depths down to 1 500-2 000 m. Numerically, catches were dominated by Patagonian ... although this trend may be confounded by the presence of local seabed features, and juvenile fish in nearby ... Paper Title: Results of a longline survey on seamounts in the southeast Atlantic and in Subarea ... Antarctic Polar Front (Meteor Bank) and in the CCAMLR region (Shona and Spiess seamounts, the western slope ... ) by depth stratum followed a similar trend in all regions (Figure 8). The stratum with largest ... confounded by the presence of local seabed features, and juvenile fish in nearby shallow water. The sex ... longlines (L6pez Abellan and Gonzalez, 1998) of 2 775 to 13 875 m in length, and each with 1 500 to 7 500 ... dominance in the by-catch of the widespread genus Macrourus was common to both areas. The relative ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Auteur(s): López Abellán, L.J. and J.F. González Jiménez
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
southwest (SW) Atlantic sector is a major scale of variability, driven by sea-ice and climate effects on ... include krill in food-web models and to guide modellers to key sources of data. It describes the strengths ... fishery (sustained sampling in one place and wide area and time coverage) and via predators (long time ... . Temporally, the intense (order of magnitude) interannual variability in krill population size within the ... , albeit in krill ‐r ich parts of kril l’s range Krill in 0‐10 m l ayer missed by acoustic surveys ... by the broader krill population may also occur and may serve to maintain the population in a ... concentrations Krill in 0–10 m layer missed by acoustic surveys: small habitat volume but occasionally high ... found in swarm densities Figure 1: Schematic representation of habitat volume occupied by krill. The ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Auteur(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)
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Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area
by the offshore commercial fishery in the area in the late 1970s. This interpretation is consistent ... Paper Title: Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons ... and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area ... continued at Potter Cove from 1991 to 1999, and at Harmony Cove, Nelson Island, in the austral summer of ... . Therefore, changes in the population are expected to be reflected by the catches. Over a period of eight ... carried out by Duhamel (1990) in the Morbihan Gulf, Kerguelen Islands. He reported a reduction in ... Shetland Islands area over a similar period from 1991 to 1998. While the fish species identified in ... ., 1998). Moreover, at the onset of the last decade in waters around the South Orkney Islands - a ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 43–52 : Auteur(s): Barrera-Oro, E.R., E.R. Marschoff and R.J. Casaux
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Patagonian toothfish in international waters of the Southwest Indian Ocean (Statistical Area 51)
eleginoides) took place from 28 June to 27 July 2003. This experiment was carried out by a Spanish longliner ... , following commercial fishing procedures, in a restricted area south of Madagascar and north of Prince Edward ... located at the edge of the principal area of D. eleginoides concentration, in which a residual recruitment ... Paper Title: Patagonian toothfish in international waters of the Southwest Indian Ocean ... , followed by a mixture layer below, and the intermediate sub-Antarctic water masses in the layer deeper ... those obtained by López Abellán and González Jiménez (1999). In this work, the authors related the ... . eleginoides in the area should be able to be found by following these water masses at in- creasing depths ... there is a characteristic size structure dominated by individuals of greater sizes (López Abellán and ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 207–214 : Auteur(s): López Abellán, L.J
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On the presence of Paralomis spinosissima and Paralomis formosa in catches taken during the Spanish survey Antártida 8611
the archipelagos in the Scotia Sea. A total of 345 hauls was conducted, of which 29 took place around ... Paper Title: On the presence of Paralomis spinosissima and Paralomis formosa in catches taken ... m. In the whole of the area surveyed, the two crab species of the genus Paralomis (P. spinosissima ... and P. formosa) were found only around Shag Rocks and South Georgia. P. spinosissima was caught in ... ., distribution, CCAMLR INTRODUCTION In July 1992 exploratory fishing for Antarctic c r abs (Paralomis ... spinosissima a n d Paralomis formosa) was carried out in waters around South Georgia and Shag Rocks by the ... out all around the archipelago except in a small area traversed by a multitude of submarine canyons ... have been caused by a low density of these species in the area, or more possibly by a low level of ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 165–173 : Auteur(s): López Abellán, L.J. and E. Balguerías
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Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys
/without food in Subarea 48.3, did not show a consistent pattern from year to year. Likewise, in the four ... surveys by the Dr Eduardo L. Holinberg from 1994 to 1997, high proportions of fish had empty stomachs, a ... Paper Title: Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from ... mackerel icefish (Champsocephalus gunnari) caught in CCAMLR Subarea 48.3 in late summer from 1994 to 1997 ... of krill in the area based on a dietary analysis of C. gunnari by frequency of occurrence, we have ... consistent pattern from year to year. Likewise, in the four surveys by the Dr Eduardo L. Holinberg from 1994 ... surveys were organised and sponsored by the 'Instituto Antartico Argentino' in conjunction with the ... product of the percentage by number and the percentage by weight of each prey type. Overall, in 6% of ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Auteur(s): Barrera-Oro, E., R. Casaux and E. Marschoff
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Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
both ecological processes and in community structure. Habitats revealed by collapsed ice shelves ... one of the recommendations made by the Antarctic Treaty Meeting of Experts in 2010. File: Trathan et ... communities under ice shelves in the context of recent, rapid, regional climate change Abstract / Description ... : Recent rapid climate change is now well documented in the Antarctic, particularly in the Antarctic ... consistent with the precau- tionary approach advocated by Recommendation 26 of ATME in 2010 (ATCM, 2010). A ... such changes, primarily in the absence of any effects caused by other human activities. In this ... changes in both ecological processes and in community structure. Habitats revealed by collapsed ice ... would fulfil one of the recommendations made by the Antarctic Treaty Meeting of Experts in 2010 ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Auteur(s): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock
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Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)
Paper Title: Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions ... participation in the fishery, with only some Small-scale Research Units (SSRUs, consisting of 10° longitude ... there are two stocks in the area, one in Division 58.4.1 and one in Division 58.4.2, with the division ... very low productivity. Estimates of average biomass were made by comparison of standardised catch rates ... for each stratification as density multi- plied by area size. In the analysis presented here, a ... of toothfish in an area, with animals only being replaced by immigration over the scale of a year ... useful in assessments (Table 5). Although a large number of tags have been released by other nations ... 58.4.2. A reduc- tion in catch limit should be accompanied by more innovative exploratory research, in ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Auteur(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán
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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
Paper Title: Interactions of Patagonian toothfish fisheries with killer and sperm whales in the ... Patagonian toothfish (Dissostichus eleginoides) longline fishery is exposed to high levels of depredation by ... Patagonian toothfish were lost due to depredation by killer whales and both killer and sperm whales. Killer ... pods were involved in 81.3% of the interactions. Significant variations of interaction rates with ... hauled in the presence of cetaceans divided by the total number of longlines set by a given fishing ... depredated by a pod of killer whales and left the area to set its lines in another area, the time necessary ... depredation rates could also be explained by a greater efficiency (i.e. an increase in the amount of fish ... Crozet Islands Longline fisheries are the most impacted by depredation. In tropical and sub-tropical ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 179–195 : Auteur(s): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
Paper Title: Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in ... eleginoides) was investigated in two offshore regions in the southwestern Atlantic: on the Argentinian ... principal fish species in the diet of D. eleginoides on the Argentinian continental shelf were nototheniids ... (Zoarcidae, Moridae, Bathydraconidae, Channichthyidae) and on Decapoda, while juveniles in coastal waters ... Kondakovia longimaiza with an occurrence of 14.7%F and a high percentage by weight in the diet due to the ... ; stratification was made by area and depth intervals. In all three cruises, samples were collected using an ... distributions were determined by grouping individuals in 10 cm total length (TL) classes. Fish were sorted by ... cluster analysis were used to characterise feeding preferences by sex and length categories in each ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Auteur(s): García de la Rosa, S.B., F. Sánchez and D. Figueroa