Résultats de la recherche

1. Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach

   established. Data from the CCAMLR Convention Area suggest that M. hyadesi may live for two years, but this may ... falls between one and two years as this infers that the spawning season would alternate between ... . hyadesi in the Scotia Sea are better understood. Whether the life span of M. hyadesi is one or two years ... in that year (Rodhouse, 1991). In February 1989 two Japanese squid jiggers carried out an ... increments in statoliths were up to one year old (Rodhouse, 1991; Rodhouse et al., 1994). Given the early ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 125–139 : Auteur(s): Rodhouse, P.G

2. A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region

   demand estimates are based usually consider time Hill et al. 8 periods of less than one year, which ... krill in one year. The total demand was divided equally between summer and winter. Whales W1. The ... = + where o is the number of adult males (aged ≥7 years) per adult female and μM and μF are the male and ... proportion of this demand taken in season s. This calculation assigns addi- tional demand for one juvenile ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Auteur(s): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters

3. A functional division of Electrona carlsbergi (Tåning, 1932) area of habitat in relation to the latitudinal zonation of the Southern Ocean

   Southern Atlantic along two meridional transects at 17° and 20°W in the latitudes from 37°30' to 55°30 ... 'S. The survey was mainly focussed on studies of distribution of adult and pre-spawning Electrona ... Zone and Subtropical Frontal Zone. The centre of the species' area of habitat is in the Sub ... in the latitudinal band between 37°30' and 55°30'S. The choice of these two meridians was dictated ... AND METHODS From 20 March to 10 April 1989, two longitudinal transects were made along 17° and 200W ... encountered in 20 of the 26 hauls. It was found in the catches of two hauls in the Antarctic Zone, four hauls ... southern boundary of the PFZ passed between 54°30' and 55°S. However, water structure typical for this ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 369–395 : Auteur(s): Zemsky, A.V. and S.A. Zozulya

4. Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   work on this species. Von Bertalanffy growth models assuming different growth by sex and by year-within ... mean total length-at-maturity (38.8 and 46.4 cm) and mean age-at-maturity (10.6 and 13.6 years) are ... Paper Title:  Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from ... -sex were fitted separately to a revised length-at-age dataset and compared using the likelihood-ratio ... standard normal distribution R es id ua ls (b) 20 30 40 50 60 70 80 -2 -1 0 1 2 Fitted values R ... 0 1 2 3 20 30 40 50 60 70 80 Fitted ... R es id ua ls (b) 20 30 40 50 60 70 80 -2 -1 0 1 2 Fitted values R es id ua ls -3 -2 -1 ... and 30 years old in the second reading. Males Females 0 10 20 30 ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Auteur(s): Marriott, P.M., M.J. Manning and P.L. Horn

5. Optimization of survey sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins

   20 minutes; and the laboratory time was one person working for one hour to sort and clean the well ... confidence intervals respectively: = 2.63 ~ 3 = 25.03 :::; 26 A 10% change in the mean of two years ... WG-CEMP-90/9 OPTIMIZATION OF SURVEY SAMPLING DESIGN IN ... values for the variance components and their 80% confidence intervals have been extracted from Table 3 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 551–559 : Auteur(s): Marschoff, E. and B. Gonzalez

6. The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model

   , including one each for krill (productivity) and fishery performance (services) and two (health and ... season (1 = summer), and the notation 1970 indicates the sum of values across the two seasons in a year ... nominally beginning in 2007 and par- titioned into 20 years of fishing, using a can- didate catch allocation ... option and a specified allowable catch, followed by 20 years without fishing (SC-CAMLR, 2007a; Watters ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Auteur(s): Hill, S.L. and J. Matthews

7. Age–length composition of mackerel icefish (Champsocephalus gunnari, Perciformes, Notothenioidei, Channichthyidae) from different parts of the South Georgia shelf

   Rocks. Differences were observed between those those two groups and the eastern group. The larger number ... population, whether a fishery is operating or not. As a result of this, as well as the species' ability ... the age of 2-3 years. It has been found that, by number, recruits represent the largest part of the ... Paper Title:  Age–length composition of mackerel icefish (Champsocephalus gunnari, Perciformes ... size one or two age groups were always prevalent in composition of catches: the smallest average fish ... of the population comprises one or two age groups of fish, predominantly at the stage of maturation ... generator with one trawl station for each 80-100 miles2, with no less than three stations per stratum ... was increased by one year. RESULTS History of Commercial Fishing for C. gz~rzizcrri C ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 133–146 : Auteur(s): Frolkina, G.A

8. Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77-1986/87

   biomass density of C. gunnari stock. High biomass density appeared with 2-4 year intervals after ... recruiting an abundant year-class to the exploited stock. The biomass of other bottom species is more stable ... intervals and until 1984 kept catches at a high level, each time for two subsequent seasons : the year ... ). >- L 100 80 2 60 x 40 20 158114 t \ \ \ \ \ \ \ \ \ . \ \ \ . 1976/17 ... seasons (Table Ill). Prior to the 1977;78 seaons, large fish with lengths of 30-65 cm, age-groups ... ; strong year classes of 1976, 1977, and 1978 were recruited to the stock. At that time young fish, age ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 185-211 : Auteur(s): Mucha, M. and W. Ślósarczyk

9. The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species

   across a range of 'ecosystem' effects and, as formulated here, can also be related directly to ... 20-30 years, wl~ich is the critical period over which the system should not be irreversibly changed ... unit of mass, I;, ,, is the predator-specific cost of producing one offspring in that year, and m ... vary from one year to the next and the consequences for the populations of predators of a changing ... may vary from one year to the next. If the environment is changing, then the prey species may assume ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 37–64 : Auteur(s): Constable, A.J

10. Fish distribution and biomass in the Heard Island zone (Division 58.5.2)

    occupies. There was one aggregation area of Lepidonotothen squamifrons on an outlying bank during two ... species were found to be abundant. There were two consistent areas of aggregation of Champsocephalus ... distribution, abundance and biology of the most important species, covering a number of years and seasons. Five ... gunnari, but total abundance varied greatly between years. Channichthys rhinoceratus has a similar ... site in Pike, two in 200, one in 300 and one in species, 200 specimens were selected at random 500 ... density in nearly all strata, high densities were recorded only in two restricted localities. One was on ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 Standard length (mm) Standard length (mm ... CCAMLR Science, Vol. 2 (1995): 1-20 FISH DISTRIBUTION ...

    Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 1–20 : Auteur(s): Williams, R. and W.K. de la Mare

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