Результаты поиска
-
Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl
/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs ... according to the standard method for Isaacs-Kidd midwater trawls operating in the layer 0 to 100 m. Overall ... , 48.2 and 48.3) and for the whole study area. Survey results confirm current understanding of the ... greatest variability of krill distribution on the spatial-temporal scale of the survey, which is ... is concentrated and for which krill stock management measures have been implemented on the basis ... needed to obtain such material. Previous surveys carried out annually over nearly 20 years covered only ... article we present an analysis of krill distribution using data obtained during three mesoscale surveys ... Evrika (20 January-9 March 1988) Figure 1: Station grid for krill sampling surveys. Krill ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Автор(ы): Sushin, V.A. and K.E. Shulgovsky
-
The influence of bait quality on the sink rate of bait used in the Japanese longline tuna fishing industry: an experimental approach
Paper Title: The influence of bait quality on the sink rate of bait used in the Japanese longline ... tuna fishing industry: an experimental approach Abstract / Description: Experiments were conducted to ... determine the effects of bait size (large versus small) and bait condition (frozen versus thawed) on the ... . The addition of a 20 g lead sinker to a conventional 20 g tuna hook reduced the sink time of bait ... the effect of added weight (sinkers) on the sink rates of bait. Lead sinkers weighing 10 g, 20 g, 30 ... BAIT QUALITY ON THE SINK RATE OF BAIT USED IN THE JAPANESE LONGLINE TUNA FISHING INDLISTRY: AN ... a thon conventionnel de 20 g, on reduisait le temps d'immersion de l'appat de 50%, soit 2".m-l. Ces ... An experiment was conducted to measure the effects of bait species, bait condition and bait size on ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 123–129 : Автор(ы): Brothers, N., A. Foster and G. Robertson
-
An assessment of the impact of krill fishery on penguins in the South Shetlands
Paper Title: An assessment of the impact of krill fishery on penguins in the South Shetlands ... an adverse impact on the local krill biomass, and hence on penguins, when catch levels are also taken ... Abstract / Description: An assessment of the competition between the Japanese krill (Euphausia superba ... Islands (Subarea 48.1) was made based on available information on the fishery, penguins and krill. The ... 20 or 30 X 30 n miles from recent surveys (1989/90 and 1990/91). The krill biomass for each of ... localised areas. Thus, the present fishery is very unlikely to have an adverse impact on the local krill ... , krill catches were calculated for each square of 10 minutes latitude by 20 minutes longitude (=l0 X 10 ... on the size and location of colonies were available for chinstrap (Pygoscelis antarctica), Adelie ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Автор(ы): Ichii, T., M. Naganobu and T. Ogishima
-
Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula: towards an improved understanding of off-peak census correction factors
Paper Title: Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula ... : towards an improved understanding of off-peak census correction factors Abstract / Description: Penguin ... censuses on the Antarctic Peninsula are often subject to logistical challenges that preclude nest counts ... . In this paper the authors present an analysis relating to both these challenges. Clutch initiation ... mean CID at each of the sites and years for which data were available. On the x-axis is the mean day ... correcting off-peak censuses, this model is applied to two census counts for which exact data on CID is ... on which CIDs were recorded for each of the species at each site in each year. The y-axis ... of cluTch iniTiaTion in Pygoscelis penguins on The anTarcTic peninsula: Towards an improved ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 149–165 : Автор(ы): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece
-
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
Crozet Islands Exclusive Economic Zone: an assessment of depredation levels and insights on possible ... , killer whales alone, and the two species co-occurring were observed on 32.6%, 18.6% and 23.4 ... whales were found to be responsible for the largest part of this loss (>75%), while sperm whales had a ... killer whales were detected between vessels suggesting the influence of operational factors on ... (49%) depredation had occurred in that year. These two factors could account for the lower estimated ... depredation rate for that year, Tixier et al. 190 which could be an artefact related to the method used ... economIc zone: an assessment of dePredatIon levels and InsIghts on PossIble mItIgatIon strategIes P ... , killer whales alone, and the two species co-occurring were observed on 32.6%, 18.6% and 23.4 ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 179–195 : Автор(ы): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
-
A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands
gibberifrons observed in fjords in two sites in the South Shetland Islands Abstract / Description: A declining ... two sites in the South Shetland Islands (Subarea 48.1), is analyzed by a nested ANOVA and demonstrated ... as significant. The material for the current study was obtained with trammel nets at Potter Cove ... , King George/25 de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half ... de Mayo I. and Moon Bay (Climara Station), Livingston I. This paper presents an analysis on the ... , expressed as proportions (Equation 1). An overall declining trend is evident for both species, and its ... similar depths in sites close to Potter Cove and Moon Bay contain data on accumulated catches for non ... NOTOTHENIA ROSSII MARMORATA AND NOTOTHENIA GIBBERIFRONS OBSERVED IN FJORDS IN TWO SITES IN THE SOUTH ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Автор(ы): Barrera-Oro, E. and E. Marschoff
-
Validation of sink rates of longlines measured using two different methods
Paper Title: Validation of sink rates of longlines measured using two different methods Abstract ... / Description: Sink rates of integrated weight longlines (lines with 50 g.m –1 lead integrated into two strands ... of the ground line – IW-50 lines) were measured during commercial fishing operations using two ... lost during the trial. Bottle tests were most useful, depending on sea state and weather conditions ... temperature where they soaked for at least 30 minutes before being deployed. Since the TDRs may hang on the ... , depending on sea state and weather conditions, for measuring sink rates to shallow depths when instant ... day, bottles and TDRs were deployed on the same lines but on separate magazines, because an ... deployment of an instrument about 30 s before it passed through the setting chute. The observer positioned ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 179–187 : Автор(ы): Wienecke, B. and G. Robertson
-
Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3
for the simulation testing of procedures, and an operational definition of CCAMLR Article II to ... on the Krill CPUE Simulation Study. Annual TACs are restricted to an initial ceiling (C c) for a five ... year, depending on how many of the previous three years' CPUE values fall below a target level of ... Paper Title: Towards an initial operational management procedure for the krill fishery in ... an impact on the assessment data generated by the model for the next year of the simulation. In this ... depends on how many of the CPUE values for the previous three years fell below CPUEw (see equation (2 ... unexploited prob. quota for first catch 20 years biomass biomass reduction made five years increase Cc Cr ... . Annual TACs are restricted to an initial ceiling (Cc) for a five year period, with a reference CPUE ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Автор(ы): Butterworth, D.S.
-
Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations
years, seasons and nations Abstract / Description: Patterns of fishing ground selection were ... remained relatively constant in Subareas 48.2 (March–May) and 48.3 (June–August). In 25 years of krill ... of high krill density observed by scientific surveys, and possible reasons for this mismatch are ... further discussed. A revised format for data submission is suggested in order to accommodate possible ... seasons and calendar years: CCAMLR fishing seasons start on 1 December and end on 30 November. For ... Science, 3: 13–30. Hewitt, R.P., D.A. Demer and J.H. Emery. 2003. An eight-year cycle in krill biomass ... period. All data points were assigned to SSMUs (Figure 1). For the 10 n mile x 10 n mile or 30 n mile x ... example, the fishing season starting on 1 December 1995 and ending on 30 November 1996 is expressed as ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Автор(ы): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu
-
Catch per unit effort (CPUE) data from the early years of commercail krill fishing operations in the Atlantic sector of the Antarctic
years on a subarea and area basis, and between oceanic and shelf regions. Results show that the CPUE may ... does not occur over time for the entire area. High average CPUE were observed in the years 1975/76 and ... discussed as an indicator of krill abundance/biomass and caution is expressed in this regard. Depending on ... Paper Title: Catch per unit effort (CPUE) data from the early years of commercail krill fishing ... and for different years (a to g). (e) Season 1984185 12 10 15 20 25 30 35 40 45 50 55 60 65 ... hours for the split-year (1 July to 30 June); (iii) mean monthly catch/hour for the split-year ... subareas in single years, between years on a subarea and area basis, and between oceanic and shelf regions ... Comparison between Subareas in Single Years Average values of the CPUE indices for Subareas 48.1 to 48.3 ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 31–50 : Автор(ы): Siegel, V., V. Sushin and U. Damm
Страницы
- « первая
- ‹ предыдущая
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- …
- следующая ›
- последняя »