Résultats de la recherche

1. Selectivity parameters for Notothenia gibberifrons Lönnberg, 1905 and Champsocephalus gunnari Lönnberg, 1905 obtained during “8611 ANTARCTICA [ANTARTIDA]” expedition

   Paper Title:  Selectivity parameters for Notothenia gibberifrons Lönnberg, 1905 and ... / Description:  Mesh selectivity experiments for several finfish species were conducted during the Spanish ... obtained for Notothenia gibberifrons and Champsocephalus gunnari. Selection factors calculated following ... different methods with a codend mesh of 68 mm were 2.87 for Notothenia gibberifrons and 3.10 for ... 10 12 1~ 16 18 20 22 2~ 26 28 30 32 ~ 36 38 telle (cm) + punto. reole. Figura 2: Curvas de ... "EALES 8 10 12 14 16 1 e 20 22 24 26 28 30 32 34 36 38 talla (cm) + puntoe real.e Figura 4: Curvas ... Charnpsocephalus gu.nnari SHETlAND - PUNTOS REALES 4 . 6 e '0 , 2 '4 18 1 e 20 22 2. 26 2e .30 32 ~ tollo (cm ... CAMPANA "ANTARTIDA 8611" E. 8alguerfas Abstract Mesh selectivity experiments for several finfish ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 87-105 : Auteur(s): Balguerías, E.

2. Estimating confidence intervals for fish stock abundance estimates from trawl surveys

   Paper Title:  Estimating confidence intervals for fish stock abundance estimates from trawl ... surveys Abstract / Description:  A method is developed for calculating asymptotic confidence intervals for ... trawl surveys, and in particular, develops an improved method for the estimation of confidence ... net haul densities has to allow for an often substantial probability that a given haul will produce ... distribution with one degree of freedom, at the a probability level. An asymptotic confidence interval for ... biomass, given by: where bj is the biomass estimate for stratum j. In calculating an asymptotic ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 203–207 : Auteur(s): de la Mare, W.K

3. Reproductive performance of seabirds and seals at South Georgia and Signy Island, South Orkney Islands, 1976-1987: implications for Southern Ocean monitoring studies

   , South Orkney Islands, 1976-1987: implications for Southern Ocean monitoring studies Abstract ... and for Adélie and chinstrap penguins at Signy Island, South Orkney Islands, are summarised and ... synchronised with those at South Georgia; they correlate best (especially for chinstraps, which suffered badly ... albatross, penguin and fur seal biology are reviewed in terms of their sensitivity and suitability for ... -1987 : IMPLICATIONS FOR SOUTHERN OCEAN MONITORING STUDIES* J.P. Croxall, T.S. McCann, P.A. Prince ... Antarctic FUr Seals, at Bird Island, South Georgia and for Adelie and Chinstrap Penguins at Signy Island ... correlate best (especially for Chinstraps, which suffered badly in 1980-81 and 1982-83) with the date of ... reviewed in terms of their sensitivity and suitability for detecting changes in the marine environment ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 445-447 : Auteur(s): Croxall, J.P., T.S. McCann, P.A. Prince and P. Rothery

4. Reproduction of the mackerel icefish (Champsocephalus gunnari) and its implications for fisheries management in the Atlantic sector of the Southern Ocean

   for fisheries management in the Atlantic sector of the Southern Ocean Abstract / Description ... March to the end of each year's meeting of CCAMLR which is usually held in late October or early ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 51–68 : Auteur(s): Kock, K.-H.

5. Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region

   ratio of 0.88 to 0.94 for different years. The exchange rate of water masses and krill biomass within ... Antarctic Peninsula region Abstract / Description:  A net sampling survey for krill was carried out by RV ... data of an identical survey with RV Polarstern in 1987/88. Seasonal variation between summer and winter ... resulted a rate of Z = 0.88 (1989/90) and Z = 0.96 (1987/88). Production was estimated and resulted a P/B ... Antarctic Peninsula survey area for different years. 30 • PN87/88 29 oME89/90 28 z27 .E 26 25 ... population with an unknown age structure. 2. MATERIAL AND METHODS A net sampling survey for krill was ... results of 1989/90 further showed a steady decline in number ofkrill for the older age classes. From ... of a species with a multi-year life-cycle can be obtained by summing up the results for single age ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Auteur(s): Siegel, V.

6. Status of krill target strength

   -animal measurements of target strength for live euphausiids and euphausiid-related species, made under ... Paper Title:  Status of krill target strength Abstract / Description:  Empirical estimates for the ... aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... measurements, namely thresholding. Theoretical estimates for the target strength are derived from the deformed ... assuming specific sets of physical and orientational parameters, for which there is an empirical basis ... of review attempted here may consequently be justified for gathering together diverse, generally ... the scattering from individuals. Accordingly, the state of an animal is defined by a unique ... of the South Orkney Islands at 20 kHz. For krill of mean lengths from 43.0 to 47.1 mm the effective ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Auteur(s): Foote, K.G., D. Chu and T.K. Stanton

7. Consideration of major issues in ecosystem monitoring and management

   / Description:  This paper outlines the requirements of an ecosystem approach to the management of Southern ... Ocean resources and highlights the need for information on harvested and dependent species, their ... interactions and the manner in which their populations vary naturally. Large-scale interactions are catered for ... means of CEMP. The overlap between fishing and predator foraging is being monitored. A mechanism for ... 10000 15000 0 10 20 30 40 50 60 70 80 90 100 Year Po pu la tio n si ze Recruitment fails twice ... 40 50 60 70 80 90 100 Year Po pu la tio n si ze Recruitment fails twice at random each decade ... recruitment is randomly distributed between 1 000 and 2 000. From year 20 onwards for two randomly selected ... rates can 223 Ecosystem monitoring and management 0 20 40 60 80 100 0 2 4 6 8 10 Age at ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Auteur(s): Everson, I

8. The use of patent databases to predict trends in the krill fishery

   / Description:  The fishery for Antarctic krill (Euphausia superba) caught 210 000 tonnes in 2009/10 with ... Secretariat so that it can annually update a register of krill-related patents which will be of use for ... 20 30 40 50 60 70 80 90 19 76 19 78 19 80 19 82 19 84 19 86 19 88 19 90 19 92 19 94 ... 10 15 20 25 30 19 76 19 78 19 80 19 82 19 84 19 86 19 88 19 90 19 92 19 94 19 96 19 ... 19 90 19 92 19 94 19 96 19 98 20 00 20 02 20 04 20 06 20 08 Year Cu m ul at iv e Nu m ... Figure 3: Patents related to uses of krill for Aquaculture purposes, 1973–2008. 0 10 20 30 40 50 ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 135–144 : Auteur(s): Foster, J., S. Nicol and S. Kawaguchi

9. Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia

   provide an estimate that is unaffected by confounding effects mainly due to recruitment variation, but ... also possibly due to age-dependent mortality and commercial fishing. File:  14everson.pdf ... (iv) survivorship is the same for each age class and furthermore is constant from year to year ... ). Additional information is available from Frolkina and Dorovskikh (1991), who provide an age/length key for ... in Mackerel Icefish around South Georgia Age at start of year Figure 4: Increase in length for ... each year for each of five series of size-at-age data. Everson Liste des tableaux Tableau 1 ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Auteur(s): Everson, I

10. Antarctic krill and ecosystem management – from Seattle to Siena

    (2002 – this volume), with the three papers documenting developments during CCAMLR’s first 20 years of ... / Description:  This paper outlines CCAMLR’s development of a management approach for the Antarctic krill ... approach developed in order to calculate a precautionary catch limit for the krill fishery in various ... to be consistent with the objectives of the CAMLR Convention, particularly its Article II. Emphasis ... exploitation, over a 20-year period of harvesting, should be equal to 10%’. This approach required an ... illustrated in Figure 5. Most recently an age-structured krill population model has been constructed for ... which infl uenced CCAMLR’s efforts to develop an ecosystem-based management regime for the Antarctic ... sought an intermediate position between these two extremes to account for shorter-term interests of ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 175–212 : Auteur(s): Miller, D.G.M

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