Résultats de la recherche
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Movement, growth and available abundance to the fishery of Dissostichus eleginoides Smitt, 1898 at Heard Island, derived from tagging experiments
Paper Title: Movement, growth and available abundance to the fishery of Dissostichus eleginoides ... Smitt, 1898 at Heard Island, derived from tagging experiments Abstract / Description: tocks of ... Patagonian toothfish (Dissostichus eleginoides) in different sectors of the Southern Ocean are considered to ... separate between shelves and banks separated by deep water. More particularly, the separation of stocks on ... model. However, the loss of fi sh to IUU fi shing would be indistinguishable, as far as the model is ... -tagged, the number of recaptures where only one tag remained gives an indication of the tag loss rate ... low estimated rate of tag loss also confi rms that tagging procedures are appropriate. The movement ... thanked for estimating the tag loss rate using the model of Xiao (1996). REFERENCES Agnew, D.J., L ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 33–48 : Auteur(s): Williams, R., G.N. Tuck, A.J. Constable and T. Lamb
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Factors that may influence the accuracy of abundance estimates from CCAMLR tag-recapture programs for Dissostichus spp. and best practice for addressing bias
Paper Title: Factors that may influence the accuracy of abundance estimates from CCAMLR tag ... Lincoln-Petersen equation, the simplest form of an abundance estimator using tag-recapture data, was used ... cases, examples of at-sea or model-based approaches are available from established Dissostichus spp. tag ... -recapture programs to reduce these biases. Estimates of post-capture mortality, tag-detection rates and ... increase the mortality rate of fish that are tagged and released through blood loss, infection and lice ... unaccounted loss of tagged fish, but unless tagged fish are more likely to be caught in such gear than ... Tagged fish die of natural mortality M̂ M> N̂ N> High High Correct M̂ based on natural mortality ... estimates of population size. In the CCAMLR area, tagging programs have existed in some fisheries for ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 63–72 : Auteur(s): Welsford, D.C. and P.E. Ziegler
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A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey
Paper Title: A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across ... : A probabilistic Bayesian Maximum Entropy (MaxEnt) technique was used to estimate the abundance of ... Survey of Area 48 (CCAMLR-2000 Survey) and to map the density distribution of krill across the survey ... area. Density values for the unsurveyed off-transect portions of the survey area were inferred, and ... outcome of the roll of two dice, even though the value on each die is completely random, because there ... QuAntified BAyesiAn MAxiMuM entropy estiMAte of AntArctic Krill ABundAnce Across the scotiA seA And in ... Ecology Research Group Gatty Marine Laboratory University of St Andrews Fife KY16 8LB, United Kingdom ... Email – bgh@st-and.ac.uk S.F. Gull Astrophysics Group Cavendish Laboratory University of Cambridge ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Auteur(s): Heywood, B.G., A.S. Brierley and S.F. Gull
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Characteristics of krill swarms from Prydz Bay
Paper Title: Characteristics of krill swarms from Prydz Bay Abstract / Description: The ... 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 ... hours (north of 67°51 '38"S) and the loss of resolution that this resulted in. Resolution is also lost ... available. The loss of data on krill swarms shallower than 25 m is also a prc'Jem, particularly as many of ... WG-KRILL-91/7 CHARACTERISTICS OF KRILL SWARMS FROM ... Subgroup on Survey Design was derived from a survey of Prydz Bay, Antarctica, in December 1990. Swarm ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 177–189 : Auteur(s): Agnew, D.J. and I.R. Higginbottom
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Spawning locations of mackerel icefish at South Georgia
Paper Title: Spawning locations of mackerel icefish at South Georgia Abstract / Description ... : Historical information on the distribution of spawning and larval mackerel icefish (Champsocephalus gunnari ... data from commercial fisheries and research surveys. It is concluded that there is strong evidence of ... inshore spawning at South Georgia during April within and close to the bays on the north side of the ... of each bay (North, 1990; White, 1998). Additional sampling was undertake11 within Cumberland East ... Cumberland East Bay during January 1987 gave a density of larvae of around one per cubic metre (North and ... Channichtl~yidae within krill swarms east of SouthGeorgia. Acta Ickthyol, et Piscnt., 13 (1): S11 ... LOCATIONS OF MACKEREL ICEFISH AT SOUTH GEORGIA I. Eversonm, A.W. North, A. Paul, R. Cooper and N.C ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 107–118 : Auteur(s): Everson, I., A.W. North, A. Paul, R. Cooper, N.C. McWilliam and K.-H. Kock
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Management and uncertainty: the example of South Georgia
Paper Title: Management and uncertainty: the example of South Georgia Abstract / Description ... : Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... to consider ways in which CCAMLR can improve its ability to take decisions in the face of uncertainty ... . From an examination of Articles IX 2(f) and XV 2(e, d) of the CCAMLR Convention it follows that a ... is the loss of potential catch from other species. The working group's report indicates that these ... would rebuild that stock, and allow fishing to be re-opened before there would be any loss of long ... . ) - 341 - WG-CFSA-86/13 THE EXAMPLE OF SOUTH GEORGIA Abstract Decisions on fishery management are ... often made with some degree of uncertainty in scientific advice. Such uncertainty is unlikely to be ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Auteur(s): Gulland, J.A.
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The survivorship of rays discarded from the South Georgia longline fishery
Paper Title: The survivorship of rays discarded from the South Georgia longline fishery Abstract ... season in Subarea 48.3. Capture depth had a consistently significant influence on the mortality of skates ... ) and the sex of rays also had some small influence on survivorship. Discard survivorship was 75% in ... the line at the sea surface, so as to maximise their chances of survival. Results from this experiment ... (2004): 155–164 155 THE SURVIVORSHIP OF RAYS DISCARDED FROM THE SOUTH GEORGIA LONGLINE FISHERY M ... . Endicott and D.J. Agnew Renewable Resources Assessment Group Imperial College, Royal School of Mines ... season in Subarea 48.3. Capture depth had a consistently signifi cant infl uence on the mortality of ... conditions) and the sex of rays also had some small infl uence on survivorship. Discard survivorship was 75 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 155–164 : Auteur(s): Endicott, M. and D.J. Agnew
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Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
Paper Title: Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the ... Ross Sea spanning the 2000–2009 fishing seasons. A characterisation of the oocyte developmental cycle ... of D. mawsoni shows that once development begins, oocytes grow and accumulate at the cortical alveoli ... least a 6–12 month period, resulting in a developed group of oocytes accumulating at the final ... gametogenesis and sexual cycles of six noto- thenioid fishes from East Antarctica. Polar Biol., 11 (8): 615–621 ... to severe loss of mass (both somatic and gonad). Comparing the ogives between males and females ... - AND AGE-AT-SPAWNING OF ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) IN THE ROSS SEA S.J. Parker ... National Institute of Water and Atmospheric Research (NIWA) Ltd PO Box 893 Nelson, New Zealand Email ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Auteur(s): Parker, S.J. and P.J. Grimes
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
(Indian Ocean sector of the Southern Ocean) Abstract / Description: Patagonian toothfish (Dissostichus ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ... local overfishing. The expansion of the bathymetric range of the fishery to increasingly deeper waters ... distribution, timing and area of spawning, and movements between geographical sectors) on the adult section of ... suffers from a loss of older animals; the fish- ing effort is then concentrated on still younger fish ... PaTagonian TooThfish (Dissostichus eleginoiDes) fishery in The Kerguelen islands (indian oCean seCTor of ... . This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of the Southern Ocean ... . The expansion of the bathymetric range of the fishery to increasingly deeper waters seems to have ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Auteur(s): Lord, C., G. Duhamel and P. Pruvost
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Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)
Paper Title: Long-term monitoring of krill recruitment and abundance indices in the Elephant ... for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ... interannual variability of krill recruitment is confirmed by the present analysis. Results are compared for ... an analysis of variance. File: 02siegel-etal.pdf ... the area (Siegel, 1988). To the east of Elephant Island these various discrete size groups are ... Peninsula to the east; often they are found over the northern shelf of the Peninsula in southern ... the deep basins east of the Bransfield Strait where juvenile krill dominate. However, preliminary ... MONITORING OF KRILL RECRUITMENT AND ABUNDANCE INDICES IN THE ELEPHANT ISLAND AREA (ANTARCTIC PENINSULA) V ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Auteur(s): Siegel, V., W. de la Mare and V. Loeb