Search results

1. Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea

   , I. Leonori, I. Biagiotti, A. De Felice Istituto di Scienze Marine ISMAR-CNR Sezione Pesca Marittima ... , M. Bottaro and M. Vacchi ISPRA Università di Genova Genova, Italy Abstract Target strength (TS ... of their body and skeleton. The ossification of P. antarcticum begins in the early juvenile stages (size: 45 ... –48 mm; age: second year), coinciding with an increase in lipid content in the specific ventral sacs ... -larvae of P. antarcticum with a total length from 13 to 70 mm, were conducted in the southeast of the ... both ex situ and in situ with a mean difference <1.5 dB, although the differences between the ... ), some sizes of P. antarcticum could be confused acoustically with E. crystallorophias, but not with E ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Author(s): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi

2. Krill (Euphausia superba Dana) resources and distribution in the Wilkes Land area in the seasons 1986 to 1989

   the years of observation was from 1.4 to 2.3xl()6 tonnes to the east of the Balleny Is (to 600W) and from ... of the survey area was eventually reduced slightly. As it turned out, during each year of observation ... for Fisheries and Research Fleet, USSR Ministry for Fisheries 3 The annual period used is the split-year 1 July ... to 30 June. Split-year is denoted by the calendar year in which the split-year ends, i.e., 1989 ... involved in the survey with one vessel conducting commercial krill fishing. The whole survey area from the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 149–162 : Author(s): Dolzhenkov, V.N. and V.P.Timonin

3. Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia

   on the mackerel icefish (Champsocephalus gunnari) have been simulated for a period of 30 years. These were ... with F increasing three or five years after a good recruitment; pulse fishing at an interval of three years ... to the strength of the incoming year class. An increase of F, however, should not occur earlier than four years ... ) have been simulated for a period of 30 years. These were: different levels of constant fishing ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Author(s): Köster, F.W. and K.-H. Kock

4. Size compositions of males and females in the course of the life cycle of Euphausia superba

   different years. The observed variations were related to stages of krill maturity during the reproductive ... years. The observed variations were related to stages of krill maturity during the reproductive cycle ... are analyzed over the reproductive season, using samples from different years. The observed variations were ... diverse (Figure 6). 5 Soon after spawning (females at stages C and D; later stage D only ... are correct, females should have a higher modal size, particularly during early stages of the spawning season ... in E. superba popuiations. It is likely that an increase in post-spawning mortality in females begins at later ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 3–16 : Author(s): Makarov, R.R.

5. A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures

   ha us iid s, am ph ip od s (e .g . T he m is to g au di ch au di i) ot he r in ve ... point to consider that will not be dis- cussed at length here is the degree to which each element ... Emerson, Di Erceg, Nick Gales, So Kawaguchi, Steve Nicol, Katrina Phillips, Sarah Robinson, Graham ... for information on plankton/bacteria and many others in the Australian Antarctic Division for dis- cussions along ... 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 ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 99–117 : Author(s): Constable, A.J

6. Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)

   Champsocephalus gun­ nari Lönnberg, 1905 from the Kerguelen plateau. In: di Prisco, G., B. Maresca and B. Tota ... of the fishery in the early 1990s and constituted the third phase in the development. During the period from ... 20 years after the beginning of fish- ery. The first biomass estimates were produced from ... , eastern and west- ern) of the survey area are fully included in the French EEZ (Figure ... Division 58.5.1). The swept-area method was used in the depth range from 100 to 1 000 m with 207 random ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Author(s): Duhamel, G. and M. Hautecoeur

7. Survey design to estimate krill abundance during FIBEX

   from the pack ice zone (Marr 1962; Mackintosh 1973) with the abundance decreasing rapidly some ... krill. In: the Antarctic Discovery Reports 36: 96-156. 258 MARR, J.W.S. 1962. The natural history ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 253–263 : Author(s): Everson, I., I. Hampton and G.M. Jolly

8. Analysis of albatross and petrel distribution within the CCAMLR Convention Area: results from the Global Procellariiform Tracking Database

   density dis- tribution. In total, only 0.2% of the non-breeding distribution of northern royal ... on non-breeding dis- tributions are lacking for the majority of species. A full understanding of non ... (Phillips et al., 2004b). In this analysis, the dis- tribution of black-browed albatross breeding at sites ... at the other breed- ing sites: sooty albatrosses are predominantly dis- tributed in sub-tropical waters ... , the subareas with the highest proportion of albatross and petrel breeding distribution were Subareas ... petrel breeding ranges extend across the majority of the Convention Area. Subareas with the lowest ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 143–174 : Author(s): BirdLife International (prepared by C. Small and F. Taylor)

9. Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons

   techniques, from 1991 back to 1977. The predicted age structure, dominated in recent years by the 1987 year ... -class (1 year olds in 1988), was quite robust, despite the use of various combinations of survey ... proportion of 5 year olds, which was not observed during the survey on Falklands Protector in January 1992 ... . Breakdown in the credibility of the VPA results in most recent years is attributed to the invalid assumption ... , R was generated independently for each year on each run as follows: where R = mean recruitment X = {di ... that the recruitment of 1 year olds in 1991 was lower than estimated using mean recruitment from the early part ... . The predicted age structure, dominated in recent years by the 1987 year-class (1 year olds in 1988), was quite ... to the VPA the population in 1991/92 was composed of a large proportion of 5 year olds, which ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Author(s): Parkes, G.

10. The error of the biomass estimate as a function of survey parameters and the statistics of a density field of krill aggregations

    experiments (see, for example, Venttsel, 1962). In the other limiting cese which seemB to be not ever rea ... . 1962. Cal~ulus of pro~abilitie8. State pub- lishing house of physics and mathematics lite- rature ... with the help of mathematical statistics and methods of calculus of probabilities. The biomass estimate ... of the survey with respect to the axis of the correlation ellipse and the frequency of transects ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 213-228 : Author(s): Kizner, Z.I.

Pages