Résultats de la recherche
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The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model
strategic frameworks for assessing uncertainty in ecosystem dynamics models. Such models have been used ... within CCAMLR to evaluate options for managing the Antarctic krill fishery in the Scotia Sea and southern ... Drake Passage. The model analysed here required 2 311 input values for each of four scenarios and ... to identify the important statistics for consideration when assessing uncertainty in ecosystem ... described in Hill et al. (2007a, 2007b), as an example of good practice for addressing sev- eral types of ... model outputs, and provides an objective basis for targeting data collection and modelling effort to ... Matrix 1 18 5 90 1 Vector or matrix length is the number of relevant modelled areas, except for time ... shorter than a year) 2 There are, in fact, 29 arguments for the main function. Eleven of these are ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Auteur(s): Hill, S.L. and J. Matthews
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Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea
continental slope and shelf of the Ross Sea at depths from 30 to 120 m, during the Italian expeditions of 1997 ... /98, 2000 and 2004. The regression lines for estimating TS from nine experiments were: TS 38 ... main contribution to the scattering for small fish is from soft tissues and for larger sizes from hard ... juvenile stages (size: 45–48 mm; age: second year), coinciding with an increase in lipid content in the ... , for (krb) ranging from 0.2 to 20 is similar to that of a high-pass filter, however, the non-linear ... accounts for over 90% of the echo energy (Foote, 1980a), and distributes the reflected sound more omni ... specific ventral sacs (from 12–15% of first year to 20–32% dry weight (DW) of second year; DeVries and ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Auteur(s): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi
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Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)
blooms is presented for the major provinces surrounding Antarctica. Some of the published information ... regarding phytoplankton species composition and succession is summarised. A review of ecosystem and ... biogeochemical models for the Southern Ocean is presented, with a focus on those models that have been validated ... /06, an interdis- ciplinary survey was conducted of East Antarctica (30°E to 80°E). The suite of ... blooms is presented for the major provinces surrounding Antarctica. Some of the published in- formation ... this review, the term ‘model’ is reserved for biogeochemical simulations, and ‘algorithm’ is used to ... ) data as input. Note the close match in the modelled and observed estimates for each of the six years ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Auteur(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
fishery Abstract / Description: An experiment was conducted on autoline and Spanish-system longline ... . Sink rates to 4 m depth were greatest with 35 m (0.44 m/s) and 50 m (0.33 m/s) between weights. For ... /s should greatly reduce the incidental take of albatrosses. For autoline vessels with gear and line ... hooks in about 25 minutes and 17 280 hooks in about 90 minutes (plus deployment time for the 140 m ... -browed albatrosses) and white-chinned petrels for about 20 and 33 S respectively. At 200 m spacings ... sufficient deterrents for albatrosses (see below). The bird line on the In Sung 66 consisted of a single 80 ... . Longlining. Fishing News Books. Blackwell Science Ltd., UK. Brothers, N. 1995. An investigation into the ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Auteur(s): Robertson, G.G
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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
reported for the period 1983-1990. A trend of increasing N. rossii catches was observed, but the levels of ... inshore sub-populations of N. rossii and G. gibberifrons over the last 16 years was most probably caused ... . coriiceps. We have used N . coriiceps as a reference species to obtain an abundance index for N. rossii ... abundance were analysed using an ANOVA design, grouping the hauls on a sp1it;year basis. The split-year is ... defined as the period from 1 May to 30 April next year. Variance was normalised using the trans ... performed on total and relative catches taken at PC are shown in Table 1. Split-year (1 May to 30 April ...
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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Results of Soviet investigations of the distribution and ecology of pelagic squids (Oegopsida) in the Southern Ocean
description is also suggested for M. hamiltoni, the data on which come only from beaks found in sperm whale ... specimens of that total were identified as Brachioteuthis riisei. In recent years (1978-1984) the collection ... gears, including data published in other countries and in the monographic review "World Ocean ... habits of sperm whales in the Southern Ocean for 13 years were snmmed up, the scope of material on M ... web. Such description is also suggested for M. hamiltoni, the data on which come only from beaks ... de l'esp€ce Brachioteuthis riisei. - 80 - Au cours des derni~res a.nnees (1978-1984), la ...
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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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 ... to the catches of N. neglecta. A similar declining trend had been reported in the 1960s and 1970s for ... , King George/25 de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half ... sampling by this method did not utilize a consistent amount of effort between years, the analysis made use ... , expressed as proportions (Equation 1). An overall declining trend is evident for both species, and its ... WG-FSA-90/14 A DECLINING TREND IN THE ABUNDANCE OF ... material for the current study was obtained with trammel nets at Potter Cove, King George/25 de Mayo 1 ... . neglecta. A similar declining trend had been reported in the 1960s and 1970s for neighbouring sites in the ...
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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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... the Kerguelen Islands zone for 20 years, firstly with trawlers and more recently with longliners ... entered in a single- table database called ‘Kerpêche’ for trawlers (split- years – 1 July to 30 June ... years. In 1987 (Duhamel, 1987), this was estimated to be 56 cm for males and 80 cm for females, but ... – 1979/80 to 2000/01) and in Excel tables for longliners (1990/91 to 2003/04). All these data have been ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Auteur(s): Lord, C., G. Duhamel and P. Pruvost
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Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area
increments. TL varied from 5.5 to 10.4 cm for fish in their first year (120–250 days) to 12.5–13.3 cm in 1 ... relationship found between fish length and daily otolith increments could be used for age differentiation of ... comprised two year classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of ... ) to 2.8 μm at 500 days (TL 13.1 cm). The pelagic stage of egg incubation development for fish of the ... variation in the published length estimates for fi sh of the same age. Kock (1981) reported the mean ... used for age–growth analyses. One otolith of each pair was immersed in an alcohol–water solution ... shown in Figures 1, 2 and 3. For age-reading purposes, the Antarctic split- year system was used, in ... the 1999/2000 (5 speci- mens) and 2000/01 (20 specimens) split-years. The 1999/2000 year class ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Auteur(s): Shcherbich, L.V
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Archival and satellite-linked data recorders
provides an overview of currently-available data recorders for use in research on marine animals. These ... recorders are deployed on freely swimming animals and gather data on aspects of an animal’'s diving ... Recorders, wherein the instrument is attached to an animal and data recovery and/or geolocation are ... data (.e.g. depth, temperature) about an animal of interest and stores these data until the animal ... potential for - 481 - geolocation of the animal. The details of the ARGOS system and the transmission ... of interrupted transmissions is increased. This may make such transmissions from an animal in the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 475-493 : Auteur(s): Hill, R.D.