Résultats de la recherche
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
Paper Title: Variations in echosounder calibration with temperature, and some possible ... VARIATIONS IN ECHOSOUNDER CALIBRATION WITH TEMPERATURE, AND SOME POSSIBLE IMPLICATIONS FOR ACOUSTIC SURVEYS ... profundidad Variations in Echosounder Calibration with Temperature del transductor = 2,3"C) fueron ... that the materials used to construct transducers made them susceptible to changes in character with ... backscattering (S,,) transducer gains are determined by adjusting gain settings in accordance with equations ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Auteur(s): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time
Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... outlines the theory and procedures for calibrating an echo integration acoustic system with a standard ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... with the Cu sphere are, with the exception of the long pulse length, lower than those from the WC ... is normally supplied with a new transducer. This data usually includes the leakage resistance, beam ... -INTEGRATION SYSTEM IN A DEEP TANK, WITH SYSTEM GAIN COMPARISONS OVER STANDARD SPHERE MATERIAL, WATER ... procedures for calibrating an echo integration acoustic system with a standard sphere. It presents the ... results of an extensive calibration of a Simrad EK500 scientific echosounder with a 120 kHz split-beam ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Auteur(s): Demer, D.A. and R.P. Hewitt
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Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends
with various codends Abstract / Description: Selectivity properties of single and doubler-layer twine ... codends (mesh size 120 mm) and single-layer tape codends with a mesh size of 60 and 100 mm were determined ... used in fishing for them requires further research. It should first of all cover twine codends with a ... mesh size of 80 mm, currently used on factory trawlers, as well as codends with a structure resembling ... ANTARCTIC FISH SELECTION BY THE 32/36 BOTTOM TRAWL COMBINED WITH VARIOUS CODENDS J. Zaucha (Poland ... -layer tape codends with a mesh size of 60 and 100 mm were determined. It was found that the ... fishing for them requires further research. It should first of all cover twine codends with a mesh size ... of 80 mm, currently used on factory trawlers, as well as codends with a structure resembling tape ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Auteur(s): Zaucha, J.
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A risk-management framework for avoiding significant adverse impacts of bottom fishing gear on Vulnerable Marine Ecosystems
fishing gear on Vulnerable Marine Ecosystems Abstract / Description: CCAMLR adopted a new conservation ... presence and the consequences of interaction with different types of gear, a risk-management framework is ... interactions of bottom fishing gear with VMEs and associated uncertainties from risk analysis is combined to ... should be reviewed annually to ensure that all relevant or new information has been included, appropriate ... relative effects of fishing on the New Zealand marine environment through risk analysis. ICES J. Mar. Sci ... ., D. Welsford, S. Doust and R. Kilpatrick. 2007. Demersal fishing interac- tions with marine benthos ... @aad.gov.au Abstract CCAMLR adopted a new conservation measure in 2007 to ensure that significant adverse ... with different types of gear, a risk-management framework is proposed, similar to that which has been ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 177–193 : Auteur(s): Martin-Smith, K
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Environment–krill relations in the South Georgia marine ecosystem
atmospheric components of the system, and there are also correlations with CPUE data. The CPUE index generally ... agrees with other data which give direct or indirect indications of krill availability, suggesting it can ... be a useful index for some regions. Associations with ice-edge position and atmospheric components ... were only expressed strongly in years of extreme conditions. The correlation with water temperature was ... Environment-Krill Relations in South Georgia Marine Ecosystem local availability with lower catch rates when ... atmospheric components of the system, and there are also correlations with CPUE data. The CPUE index ... generally agrees with other data which give direct or indirect indications of krill availability ... , suggesting it can be a useful index for some regions. Associations with ice-edge position and atmospheric ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Auteur(s): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky
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Research currently being undertaken by the Republic of South Africa on "dependent and related species" within the Antarctic marine ecosystem
;dependent and related species" within the Antarctic marine ecosystem Abstract / Description: Selected ... seabirds) and their prey (especially krill and squid) in the Antarctic, and closely related marine ... deals with selected components of the bloloBicat sciences Prosramme of the South African National ... investi':la:te their inte1·action with thei1• environrr,ent. Seals Re,,ea:rch on various ;3-spects of ... number <0re st i I I in Pros1·es-s. Re~;earctl Priorities have been set in accordance with those of n ... ~tional and international l'ro'9ramme'S, their obJective-s c:onformin?l with those of the South ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 59-77 : Auteur(s): South Africa
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A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures
framework for allowing flexibility in dealing with biological, spatial and temporal scales. The body of the ... paper is concerned with conceptualising an element of the ecosystem to account for the varying qualities ... Paper Title: A possible framework in which to consider plausible models of the Antarctic marine ... simulation framework, using plausible models of the Antarctic marine ecosystem. This paper develops a ... dealing with biological, spatial and temporal scales. The body of the paper is concerned with ... proposées dans une structure de simulation au moyen de modèles plausibles de l’écosystème marin de ... to assist with manage- ment of the krill fi shery (SC-CAMLR, 2003), and now to begin to evaluate ... will ensure that each element can effectively interact with other elements. Figure 4 illustrates the ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 99–117 : Auteur(s): Constable, A.J
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Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels
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 ... small number of individual killer whales were responsible for most of the interactions with the fishery ... . In the Kerguelen EEZ only sperm whales, alone or in co-occurrence with fur seals, were found to ... removal of fi sh from lines or nets by marine mam- mals, or entanglements with equipment. Reports on the ... of marine mammals with longlines dur- ing the haul was observed between the Crozet and Kerguelen ... for the differ- ent fi shing sectors when no marine mammals were detected interacting with the fi ... dif- ferent fi shing sectors when no marine mammals were detected interacting with the fi shing opera ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Auteur(s): Roche, C., C. Guinet, N. Gasco and G. Duhamel
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Directed research. Antarctic Marine Living Resources (AMLR). A program development plan
grounds. In cooperation with other government agencies and the private sector, the National Marine ... , among other things, that: “(A) The Director of the National Science Foundation, in consultation with the ... States Antarctic Program; (B) The Secretary of Commerce, in consultation with the Director of the ... , shall design and conduct a program of directed scientific research coordinated with the United States ... cooperation with other government agencies and the private sector, the National Marine Fisheries Service ... National Science Foundation, in consultation with the Secretary of State and the heads of other ... Secretary of Commerce, in consultation with the Director of the National Science Foundation, the Secretary ... directed scientific research coordinated with the United States Antarctic Program." The U.S. Program of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Auteur(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)
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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
integrated weight longlines? Abstract / Description: Line setters are used with integrated weight (IW) (50 g ... the sink rates of IW longlines. Time-depth recorders were deployed on lines set with and without a ... line setter using a paired-treatment design. Sink rates of longlines set with and without a line setter ... likely to be most intense. Longlines deployed with the line setter entered the water several metres ... of Fisheries PO Box 1020 Wellington, New Zealand Abstract Line setters are used with integrated ... Ministry of Fisheries PO Box 1020 Wellington, New Zealand M. McNeill Sealord Group Vickerman Street ... Nelson, New Zealand S.G. Candy Department of the Environment, Water, Heritage and the Arts ... , 1994). In an experiment in the New Zealand ling (Genypterus blacodes) fishery, the majority of dives ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Auteur(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith