Search results
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Species identification and age estimation for the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea
origin and lateral line (mean in parentheses) <27 22–31 (26) 25–59 (36) Pyloric caeca (mean ... 4. running ripe 5. spent. Data were collated by centimetre size class, and mean snout–vent length ... stage 2 or greater. The regression equations derived above were used to convert mean vent length ... at maturity into mean total length at maturity and mean age at maturity. RESULTS Species Identifi cation ... whitsoni) from the Ross Sea Abstract / Description: Samples of macrourid rattail by-catch from the ... toothfish fishery in the Ross Sea dependency in 2002 were identified by observers and returned to New ... Zealand for subsequent confirmation of their identity by researchers from the National Institute of Water ... the geographic source of the aged sample. Counts of translucent zones were made from baked and cross ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 37–51 : Author(s): Marriott, P., P.L. Horn and P. McMillan
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The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring Program
in the CEMP. The extensive dependence of this species in these ISRs on Euphausia superba, (including ... in winter), its residence in the ISRs in winter and its early attainment of sexual maturity are all ... Regions (ISRs) of the CCAMLR Ecosystem Monitoring Program), we suggest (and provide a full bibliography of ... features of special relevance to the CEMP. File: 30-Croxall-and-Williams.pdf ... dependence of this species in these ISRs on Euphausia superba, (including in winter), its residence in the ... ). Only in one year (1985) did the proportion of E. superba fall below 65%. During the winters of 1987 ... and 1988, E. superba was also the main component (c. 90%) of the diet at South Georgia (Williams, in ... krill is the main (70%+) component of the diet (Jablonski, 1985; Trivelpiece et al., 1987). In both ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 483–488 : Author(s): Croxall, J.P. and T.D. Williams
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CPUE indices used in Soviet krill fishery statistics from 1977 to 1992 and their possible utility for evaluation of relative changes in krill biomass
). A relatively high correlation between mean monthly values of CVDF and CEVDF, and CVDF and CHT was observed ... . However, the correlation between daily mean values was quite low as a result of significant fluctuations ... end products, i.e. human consumption, krill meal and frozen krill. Daily mean CVDF and CHT calculated ... of trawling (CHT). A relatively high correlation between mean monthly values of CVDF and CEVDF, and CVDF ... ) and catch per hour of trawling (CHT). A relatively high correlation between mean monthly values of CVDF ... and CEVDF, and CVDF and CHT was observed. However, the correlation between daily mean values was quite low ... . Daily mean CVDF and CHT calculated for specifi c strategies were well correlated. Depending on the fi ... are infl uenced by many factors, means that they may not always be appropriate for that purpose (Siegel ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 165–177 : Author(s): Litvinov, F.F., A.Z. Sundakov and V.I. Arkhipov
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Possible effects of different levels of krill fishing on predators – some initial modelling attempts
adult survival (S?) This rate is taken (in the first instance) to be equal to the estimate of mean ... inconsistency is that the mean adult survival rate estimates provided by CCAMLR (1993) do not pertain ... fixed y), but fluctuates over time. This means that S, and SI also fluctuate over time, as determined ... predator species considered for the deterministic model, as evaluated by means of equation ... CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... that variability in the annual recruitment of krill results in predator populations being less ... some krill predator populations, and on the possibility of biases in their estimation. These matters ... will need to be taken into account in future developments of this approach, before the latter can claim ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson
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Assessment of krill flux factors in waters of South Orkney Islands during summer 1996
perimeter. Mean krill transport rate was 7.2 tonnes/hour/n mile with a standard deviation of 15.5 tonnes ... , evaluations of geostrophic and wind-induced water transport along the study area perimeter. Mean krill ... water transport along the study area perimeter. Mean krill transport rate was 7.2 tonnes/hour/n mile ... INTRODUCTION The major obstacles i n making meaningful assessments of krill flux were the lack of a general ... to Subareas 48.1, 48.2 or 48.3) by means of evaluating geostrophic velocity profiles of water mass transport ... boundary section of the study area to mean water mass transport per nautical mile (Ei), the mean krill ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 195–204 : Author(s): Kasatkina, S.M., V.N. Shnar, M.I. Polischuk, A.M. Abramov and V.A. Sushin
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Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)
. n o ~ p a g o ~ e 48.3. 3 a IIepllOA C 1984 no 1990 r . BbInOJIHeHO 6 nOnHOqeHHblX IIeJIaTHYeCKMX C%eMOK, KOTOPbIe ... From 1984 to 1990 scientists from the Atlantic Research In s t i t u t e of Mar ine Fisheries ... t a ined d u r i n g t h e AtlantNIRO surveys: composition of the pelagic component ... before decreasing again in the second half of the night (Table 3). Table 3: Mean index of stomach ... ichthyocenosis in the subarea consisted of pelagic fishes (mainly Myctophidae), distributed at a depth range of ... 250 to 300 m, as well as demersal fishes in the pelagic stage of their life cycle. Catches contained ... small ones were caught in the water column. The main food item (up to 60-80%) of both juvenile and adult ... fish taken by the sampling trawl in the water column was found to be krill. Aggregations of juvenile C ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 125–164 : Author(s): Frolkina, G.A., M.P. Konstantinova and I.A Trunov
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Use of indices of predator status and performance in CCAMLR fishery management
An important part of the uniqueness of the Convention for the Conservation of Antarctic Marine Living ... consumers (see Article 11, paragraph 3{b)). This obligation has led the Commission for the Conservation ... of the ecosystem, to serve as the basis for the conservation of Antarctic Marine Living Resources. The monitoring ... change. Also, as more CEMP data become available there is likely to be a better chance of meaningful ... used in the management, by CCAMLR, of commercial fisheries. It reviews reasons why it is important for ... inherent in the CEMP data, both from predator monitoring and harvesting perspectives. An outline of a ... . The three elements of the assessment are determining the magnitude and significance of changes in ... Paper Title: Use of indices of predator status and performance in CCAMLR fishery management ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 353–365 : Author(s): Croxall, J.P.
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Consideration of major issues in ecosystem monitoring and management
by means of CEMP. The overlap between fishing and predator foraging is being monitored. A mechanism ... to investigate krill availability. Vital rates can be investigated directly and also by means of CEMP ... availability. Vital rates can be investigated directly and also by means of CEMP. The overlap between fi ... with the provisions of this Convention and with the following principles of conservation: (a) prevention ... possible the sustained conservation of Antarctic marine living resources. The implementation ... of these requirements means that the management process must provide adequate safeguards for harvested species ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Author(s): Everson, I
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Krill biomass in Area 48 and Area 58: recalculations of FIBEX data
estimates of mean density and biomass for the Indian Ocean sector and the West Atlantic sector as well ... estimates of mean density and biomass for the Indian Ocean sector and the West Atlantic sector as well ... held in the BIOMASS database were used to provide estimates of mean density and biomass ... de sonido de 120 kHz. 1. INTRODUCTION In 1991 the Commission for the Conservation of Antarctic ... (Conservation Measure 32/X). These limits were based on calculations undertaken by the Scientific Committee's ... mean length was available for the Kaiyo Maru (41.4 mm) (Anon., 1986 - p. 46), but no information ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 157–181 : Author(s): Trathan, P.N., D.J. Agnew, D.G.M. Miller, J.L. Watkins, I. Everson, M.R. Thorley, E. Murphy, A.W.A. Murray and C. Goss
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Statistical power to detect changes in growth rates of Antarctic fur seal pups
on only three dates in a season, and potential means of increasing the power of the CCAMLR Ecosystem ... dates in a season, and potential means of increasing the power of the CCAMLR Ecosystem Monitoring ... in a season, and potential means of increasing the power of the CCAMLR Ecosystem Monitoring Program Standard ... pups at monthly intervals beginning about 30 days after mean pupping date and concluding prior ... on which pups should be weighed. If the first sample is weighed 30 days after mean pupping date, three ... additional samples at monthly (say 28-day) intervals would conclude on the 114th day after mean pupping ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Author(s): Boveng, P., J.L. Bengtson and M.E. Goebel