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Potential nursery areas for fish in the Prydz Bay region
antarcticum. This species was abundant (up to 9 100 were caught in a 30 minute haul) especially near the shelf ... Paper Title: Potential nursery areas for fish in the Prydz Bay region Abstract / Description: A ... survey with a fine-meshed midwater trawl in Prydz Bay in January/February 1991 indicated the potential ... all juvenile fish were caught in the top 50 m over the shelf, and more than 95% were Pleuragramma ... were caught in a 30 minute haul) especially near the shelf break. The dominant size class was of 45 mm ... length of 20 m, and a mesh size of 15 cm in the wings and mouth area and 2 mm in the codend. Behaviour ... Nearly all the juvenile fish were caught in the near surface trawls (30 to 50 m depth), so these trawls ... catches of P. antarcticum in the near surface hauls. Large numbers (up to 9100/30 min haul) occur in the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 369–380 : Autor(es): Williams, R.
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Assessments of by-catch in trawl fisheries at Heard and McDonald Islands
Island area could be a combination of (i) limiting the total by-catch in a year to the estimates of long ... Paper Title: Assessments of by-catch in trawl fisheries at Heard and McDonald Islands Abstract ... / Description: This paper assesses the potential for the commercial trawl fisheries in the Heard Island area ... (Statistical Division 58.5.2) to significantly affect, in the long term, spawning biomass of three taxa caught ... (29 out of a total 34) being less than 400 mm in length and, by these estimates, less than 8 years ... include fish of ages 12 years and above. Values of L, and K in a von Bertalanffy growth model were ... the end of 20 years of exploitation should be 75% of the pre-exploitation spawning biomass and that ... '/30). By-catch in Trawl Fisheries at Heard and McDonald Islands Table 6: Input parameters for ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Autor(es): Constable, A.J., R. Williams and W.K. de la Mare
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Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers
Paper Title: Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed ... digests of nine sub-regions of the mitochondrial genome. Polymorphisms were found in four of seven introns ... air dried and resuspended in 40 µl sterile water and stored at –20°C. Two classes of markers, mtDNA ... performed in 20 μl volumes for a minimum of 4 h, following the manufacturer’s recommendations (New England ... 2.23 0.17 0.68 49 Genetic diversity in the Antarctic toothfi sh 30 recaptures have moved ... . 12 (2005): 43–51 43 LOW GENETIC DIVERSITY IN THE ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Autor(es): Smith, P.J. and P.M. Gaffney
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A review of the trophic role of mesopelagic fish of the family Myctophidae in the Southern Ocean ecosystem
Paper Title: A review of the trophic role of mesopelagic fish of the family Myctophidae in the ... myctophids demonstrate that this group of mesopelagic fish plays a significant role in the community of ... carlsbergi ranges from 157 to 364 million tonnes. Myctophids occupy the third level in the Southern Ocean ... . anderssoni and G. nicholsi. Results of biomass assessments of E. carlsbergi carried out in recent years in ... Vozrozhdenie in the Falkland/Patagonian area (46"00f to 46°30'S,58030' to 60°00'S) show that the highly ... V.B. Tseitlin. 1980. Secondary production in the pelagic layer of Antarctica. Okeanologiya, 20 (6 ... TROPHIC ROLE OF MESOPELAGIC FISH OF THE FAMILY MYCTOPHIDAE IN THE SOUTHERN OCEAN ECOSYSTEM A.N. Koz.10 ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 71–77 : Autor(es): Kozlov, A.N
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Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region
Paper Title: Spatially explicit population dynamics models for Antarctic toothfish in the Ross ... stage transition in a holistic framework. Using this software, three spatially explicit age-structured ... models were developed for the Antarctic toothfish (Dissostichus mawsoni) population in the Ross Sea ... (years) 0 5 10 15 20 25 30 0 ... 5 10 15 20 25 30 Age (years) 1.0 0.8 ... median movement of tagged and recaptured fish is about 30 km in a year (Parker et al., 2013). The ... al. 20 one or the other of these methods are available in various stock assessment modelling ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Autor(es): Mormede, S., A. Dunn, S. Hanchet and S. Parker
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The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
resources in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop) Abstract / Description ... of fish as krill predators in the Southern Ocean is critical to understanding how changes in fish ... abundance, such as through fishing or environmental change, are likely to impact on the food webs in the ... region. First attempts to estimate the krill and pelagic food consumption by Antarctic demersal fish in ... sold salted in some quantities to Buenos Aires a few years after whaling had begun. However, it took ... spp.) in the 19th cen- tury and the large baleen whales in the first 80 years of the 20th century ... . Nototheniids and channichthyids have a life span of typically 10–20 years (Kock et al., 1985; La Mesa et al ... in the diet of E. antarctica was conservatively estimated at 20%. Estimates were limited to ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Autor(es): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams
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Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates
Paper Title: Quantifying vessel performance in the CCAMLR tagging program: spatially and ... tagging program is critical to the successful management of a number of toothfish fisheries in Antarctica ... . In particular, tag-detection rates are directly linked to stock size estimated from the tag data in ... an integrated stock assessment. Previous attempts to assess the relative reliability of vessels in ... calculation by using CCAMLR Science, Vol. 20 (2013): 73–80 73 QuantIfyIng vessel performance In the ccamlr ... , and ends when the quota has been fully caught which, in recent years, has been between 15 January ... of tagged toothfish within season for most years (Figure 1). The method is applied in three ... were to investigate changes in performance of ves- sels between years. Due to the limited sample size ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Autor(es): Mormede, S. and A. Dunn
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An assessment of CCAMLR measures employed to mitigate seabird mortality in longlining operations for Dissostichus eleginoides around South Georgia
Paper Title: An assessment of CCAMLR measures employed to mitigate seabird mortality in ... longliner, the BF Cisne Verde, fishing in CCAMLR Subarea 48.3 during the 1996/97 season. In this study 61 ... lines were laid from March to May 1997 using the Spanish double-line method. In accordance with CCAMLR ... streamer line in mitigating incidental mortality of seabirds during night-time setting. Data were recorded ... CCAMLR Scheme of International Scientific Observation (Ashford et al., 1994). In the following year ... Kerguelen (Capdeville, 1996). The high rate found by Ashford et al. (1995) in 1994 was during a year ... higher in 1997, the year of this study, which may indicate that birds had other food sources available ... CCAMLR MEASURES EMPLOYED TO MITIGATE SEABIRD MORTALITY IN LONGLINING OPERATIONS FOR DlSSOSTlCHUS ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 217–230 : Autor(es): Ashford, J.R. and J.P. Croxall
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Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993
Paper Title: Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description: Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ... years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... density over the 13-year period were 1 703 x 103 tonnes and 53.2 g/ 2. File: 01hewitt-demer.pdf ... the effects of variations in year class strength. In six out of seven cases the change in density ... BIOMASS IN THE ELEPHANT ISLAND AREA: 1981 - 1993 R.P. Hewitt Southwest Fisheries Science Center La ... 92093, USA (Supported by the Hertz Foundation) Abstract Acoustic estimates of krill biomass in the ... vicinity of Elephant Island are presented for the years 1981 to 1993 (with the exception of 1982 and 1986 ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Autor(es): Hewitt, R.P. and D.A. Demer
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A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3
Champsocephalus gunnari in Subarea 48.3 Abstract / Description: A method of determining the rate of natural ... been correctly chosen. Data for Champsocephalus gunnari in Subarea 48.3 are used to show that the ... described method is sound. When a mistake is made in the choice of natural mortality coefficient, the ... estimate of the intercept of the regression is other than zero. A bias in the intercept will be positive if ... the value of 0.35 used by the Working Group on Fish Stock Assessment (WG-FSA) in previous years. In ... group in the first fishing year is estimated from equation (8); (ii) the abundance values Na,l, a ... fishing year, and fish mean weight are given in Tables 1 and 2. The catch by weight of C. gunnari in ... DERIVING NATURAL MORTALITY RATE USING DATA FOR CHAMPSOCEPHALUS GUNNARI IN SUB AREA 48.3 P.S. Gasyukov ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Autor(es): Gasyukov, P.S. and R.S. Dorovskikh