Resultados de la búsqueda

1. By-catch of fishes captured by the krill fishing vessel Chiyo Maru No. 2 in Statistical Area 58 (January to March 1995)

   amount of krill that was subsampled for making observations on fish by-catch. The by-catch data from the ... size (as a fraction of haul-specific krill catches) for observers collecting data on fish by-catch ... presents a brief re-analysis of the by-catch data collected on board the Chiyo Maru No. 2; means and ... variances are calculated from the delta distribution. In numbers, an average of about 14 fish were caught ... krill that was subsampied for making observations on fish by-catch. The by-catch data from the Ckiyo ... a fraction of haul-specific krill catches) for observers collecting data on fish by-catch. Resume ... , respectively, the mean and variance of the lognormally distributed observations for which X > 0. I,[x] is an ... kg of krill was subsampled for by-catch; this was an order of magnitude less than the next smallest ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 111–123 : Autor(es): Watters, G

2. Survey of Antarctic fur seals in the South Shetland Islands, Antarctica, during the 1986/87 austral summer

   largest pupping sites are at Telmo Island and Cape Shirreff, on the north coast of Livingston Island ... 4000 individuals. Notes on other pinniped species observed during the survey are presented. The optimal ... sites for combined fur seal and penguin monitoring activities, as part of the CCAMLR Ecosystem ... on beaches for their annual molting period) were sighted often. Counts of all pinnipeds were tallied ... those sites in years when data on the number of pups are not available, the total number of ... observer, there appears to be sufficient space on the Stigant Point beaches for rookery growth. These ... not previously been reported. The largest pupping sites are at Telmo Island and Cape Shirreff, on ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 427-440 : Autor(es): Bengtson, J.L., L.M. Ferm, T.J. Härkönen, E.G. Schaner and B.S. Stewart

3. By-catch, growth and feeding of Antarctic juvenile fish taken in krill (Euphausia superba Dana) fisheries in the South Georgia area, in 1992

   an investigation of juvenile Antarctic fish caught during krill fishing by the FV Grigory Kovtun in ... the area around South Georgia from May to July 1992. Two species were predominant in the by-catches ... for all trawls and for shelf trawls, respectively. For N. larseni the corresponding averages were 557 ... . were the most frequent. Only 4 and 5) could provide an explanation for the two species, E. superba ... ). Juveniles were then analysed for taxonomic identification, stomach content, standard length (with an ... normally distributed, estimations based on the delta distribution theory were used. For a more detailed ... t l 070 ind./tonne krill respectively. Although the arithmetic means were similar for the two ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 129–142 : Autor(es): Pakhomov, E.A. and S.A. Pankratov

4. Evaluation of the results of trawl selectivity experiments by Poland, Spain and USSR in 1978/79, 1981/82 and 1986/87

   in 1978/79, 1981/82 and 1986/87 Abstract / Description:  Trawl selectivity for several species of ... rates and catch composition. Details of these data were analyzed and minimum mesh sizes for several ... species were calculated. It is recommended that introduction of these mesh sizes should be considered for ... experiment 30 minute hauls produced total catches of about 0.3 to 0.6 tonnes on the average. However ... 23.6 cm. Lso values of 30 cm for mesh size 124 mm (Table 9) and of 29.4 cm for mesh 110 mm (Table 11 ... mm, to protect first spawners, or 100 mm, to give an age at first capture of 4 years; (ii) Fishery ... Georgia. Fisch - Forsch., 20 (2): 49-53. KOCK, K.-H. 1981. Fischereibiologishe Uutersuchungen an drei ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 163–196 : Autor(es): Slosarczyk, W., E. Balguerias, K. Shust and S. Iglesias

5. Response to Everson (2008)

   ., 2001 for the CCAMLR- 2000 strata). Stratum biomass is determined from the mean transect density raised ... ). The survey SD reported by Heywood et al. (2006) is there- fore based on an n of 449 500, whereas the ... . Thus, there is no reason for the MaxEnt approach to ‘provide an estimate of stand- ing stock close to ... al., 2004), krill target strengths (TS) determined from an SDWBA model (Demer and Conti, 2005), and ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 195–198 : Autor(es): Brierley, A.S., B.G. Heywood and S.F. Gull

6. Distribution of fish larvae at South Georgia: horizontal, vertical, and temporal distribution and early life history relevant to monitoring year-class strength and recruitment

   / Description:  Four studies on the early life history stages of Antarctic fish at South Georgia are reported ... . The findings are discussed in relation to surveys for sampling the early stages of fish at South ... distribution and early life history relevant to monitoring year-class strength and recruitment Abstract ... the depths sampled depends on the target species and the time of the year. For example ... significant impact on the year class strength. For Champsocephalus gunnari the period of mid-November to ... island is an important breeding area for higher predators which are also studied by shorebased research ... ). Pseudochaenichthys georgianus larvae of 12-30 mm SL were found on the shelf near the north-east coast of South ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 105-141 : Autor(es): North, A.W.

7. Choosing distance between acoustic survey tacks

   on the basis of typical size of the surveyed region, allowable relative error in the biomass estimate ... transverse size k>l. Such configuration is typical for concentrations on shelves. In this case, the tacks ... stock exploitation rate and other factors, we have to estimate the biomass with an error 8B~30 ... , ~ , ~,,~" !,I I6~,\ :::::;::""""-1:~:,~ 30~ ~ <: I:' · .. . I·"'t:':::::"............ --=:z"=~ 20% '= I,' 7 ... on the basis of typical size of the surveyed region, allowable relative error in the biomass ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 153-164 : Autor(es): Kalikhman, I.L., Z.I. Kizner, B.R. Zaripov and W.D. Tesler

8. Characteristics of krill swarms from Prydz Bay

   CCAMLR.AUS dataset available to the Subgroup on Survey Design was derived from a survey of Prydz Bay ... inter-swarm length were calculated for swarms of euphausiids encountered along a 78 km transect over the ... Euphausia crystallorophias. An increase in swarm length was seen with increasing distance from the coast ... from Davis Station on 18 December 1990 along 74°30'E longitude (Figure 1). Conditions were calm and ... 1800 ~ I- l- I- I- 50 40 30 20 10 1002 c 80 !2: ~ 60 40 20 Figure 2: Log ... ) 60 50 40 30 20 10 1n (between swarm distance) Figure 3(b): Log transformed between ... - - - I- I -44 19 (kg) 50 0 40 ~ 30 20 10 70 60 50 40 30 20 10 I'J 0 0 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 177–189 : Autor(es): Agnew, D.J. and I.R. Higginbottom

9. Status of the FIBEX acoustic data from the West Atlantic

   Herwig. While there is an error factor due to the combination of data collected at 50 kHz (Walther Herwig ... are consistent with the other surveys. The authors can find no explanation for this difference. File ... apply an empirical correction based on the differences found in the field for the MVBS value found at ... as tonnes n mile-' with an integration interval of 9 760 m; however, for the re-analysis carried ... substantial overlap in the two survey areas and an almost complete overlap in their timing, i.e. February ... of the vessels, Itzurni, Dr Eduardo L. Holmberg, Odissey and Walther Herwig. While there is an error ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 35–48 : Autor(es): Trathan, P.N. and I. Everson

10. The use of predator-derived krill length-frequency distributions to calculate krill target strength

    performance is fundamental to an ecosystem-based approach to resource management. We propose a method using ... only a 1% difference, illustrating the need for simultaneous length-frequency data. By integrating data ... from land-based predators directly with automated on-board data collection systems it will be possible ... to be independent to avoid interrelated estimates. For South Georgia, there is a 20-year time ... echosounder on these voyages, we have neither the time nor the required personnel aboard ship for net ... ., 1999a), it would be insufficient to use, for example, an annual mean krill length frequency because ... 0.9% (1994) to 6.4% (1996) and is shown for all years in Table 1. There was a significant ...

    Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Autor(es): Reid, K. and A.S. Brierley

Páginas