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Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias
presented for the collection and development of data to adjust counts of Adélie penguins made at any time in ... illustrated using data collected at the Béchervaise Island CEMP site in 2007/08. Estimates of the breeding ... Paper Title: Improving estimates of Adélie penguin breeding population size: developing factors ... the breeding season to an estimate of the breeding population. The development of ‘availability ... at any time in the breeding season to an estimate of the breeding population. The development of ... method is illustrated using data collected at the Béchervaise Island CEMP site in 2007/08. Estimates of ... breeding season at which they are undertaken (Croxall and Kirkwood, 1979). Because of the population ... dynamics of birds present at any given breeding site throughout a breeding season, optimal times may ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Autor(es): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery
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Movement and growth of tagged Dissostichus eleginoides around South Georgia and Shag Rocks (Subarea 48.3)
and there have been no reported recaptures of these fish tagged at South Georgia or elsewhere in the ... Paper Title: Movement and growth of tagged Dissostichus eleginoides around South Georgia and Shag ... (Dissostichus eleginoides) tagging program to investigate the spatial and temporal movement of fish and to ... date of injection and release. To date, 51 fish have been recaptured, mostly around Shag Rocks where ... the longline fi shery and there have been no reported recaptures of these fi sh tagged at South ... : • investigate the spatial and temporal movement of Patagonian toothfi sh (Dissostichus ele ginoides) at South ... to pH 8) at a concentration of approximately 0.2 g/ml of Sr2+ using 5 ml syringes fi tted with 40 ... mm needles. Subcutaneous injections were made at a dosage of 0.5 ml/kg of body weight equating to ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 101–111 : Autor(es): Marlow, T.R., D.J. Agnew, M.G. Purves and I. Everson
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Factors affecting the incidental mortality of seabirds in the Dissostichus eleginoides fishery in the southwest Atlantic (Subarea 48.3, 1995 season)
Paper Title: Factors affecting the incidental mortality of seabirds in the Dissostichus ... analyses all incidental mortality of seabirds recorded on Argentinian and Chilean vessels fishing for ... possible to evaluate almost all of the incidental mortality of seabirds observed during the season. The ... total mortality recorded was 1 428 birds of which white-chimed petrels (Procellaria aequinoctialis ... which several vessels fished at the same time using the same type of hook. As the data obtained had ... increase their activity in relation to the lunar cycle at this time of the year. Some of the highest ... their operations at various distances from shore, only two of them showed high mortality rates, while ... carried out at night. By contrast, vessels which deployed streamer lines displayed high levels of ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 79–91 : Autor(es): Moreno, C.A., P.S. Rubilar, E. Marschoff and L. Benzaquen
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Consideration of major issues in ecosystem monitoring and management
Paper Title: Consideration of major issues in ecosystem monitoring and management Abstract ... / Description: This paper outlines the requirements of an ecosystem approach to the management of Southern ... availability of krill, variation in vital rates of the dependent species and the overlap between commercial ... means of CEMP. The overlap between fishing and predator foraging is being monitored. A mechanism for ... of krill. At the one extreme, foraging trip duration refl ects the local availability of krill ... , patchiness is of little consequence when implementing the KYM. At smaller scales, of the order of tens or ... account. At scales other than the macro-scale, the movement of krill through a region may also be ... -frequency distributions almost certainly provide reasonable estimates of size-at-age. Estimations of ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Autor(es): Everson, I
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Prey monitoring surveys: a discussion of the characteristics necessary in prey surveys
Paper Title: Prey monitoring surveys: a discussion of the characteristics necessary in prey ... the diving range of the selected predators at certain times. It is important to be able to ... . Three of the parameters (foraging trip - 379 - duration, chick fledging weight and chick diet ... during a poorly specified period of time which includes part, at least, of the winter. These parameters ... , adult weight on arrival at breeding colony, length of first incubation shift, annual trend in size ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 377-391 : Autor(es): Everson, I.
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An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort
Paper Title: An alternative method for estimating the level of illegal fishing using simulated ... effort is put forward. The results from this new method are similar to those of the Agnew and Kirkwood ... (2005) method, and this suggests that the current method is adequate under circumstances of low evasion ... performs better in the case of zero detections and can potentially better handle the evasion of detection ... ) Here, Li is the time at which the next fi shery patrol cruise covered the area of observation i and ... shing in the area. Ei is the date at which the previous fi shery patrol cruise covered the area of ... the date of detection is determined, which is at a random date during the period of overlap. This is ... illegal fi shers will tend to curtail their fi shing, but if they are near the end of their trip they may ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Autor(es): Ball, I
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Telemetry monitoring of ecological resources
Paper Title: Telemetry monitoring of ecological resources Abstract / Description: Current status ... of telemetry and location monitoring are discussed. Limitations on weight, communication range and ... service life are indicated. A general description of attachment methods and their limitations is given ... monitoring using the Argos/Tiros system and satellite transmission of data are also covered. File: 24 ... commercial transistor in the late 1950s, the application of electronics to the monitoring of biological ... in most of the small transmitters. other than degradation of output at low temperatures, their ... system developed at the University of Minnesota in the mid-1960s 20 • It used two mechanically rotating ... to determine the angular bearings. A similar system was built at the University of Bordeaux ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 495-511 : Autor(es): Kuechle, V.B.
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The use of patent databases to predict trends in the krill fishery
Paper Title: The use of patent databases to predict trends in the krill fishery Abstract ... vessels from six of CCAMLR’s 25 Members participating in the fishery. Trends in the krill fishery are ... considerable discussion within the Scientific Committee over the utility of these sources of information to ... detect trends in the fishery, and of the need to obtain more information from the krill industry so that ... (iv) the majority of patents were directed at the use of krill for human consumption, with the next ... most numerous being those directed at uses in the production of feed and bait Foster et al. 138 ... professionals at IP Australia, to ensure the highest possible degree of coverage and reliability of data ... –140. Hidalgo, A., J. Molero and G. Penas. 2010. Technology and industrialization at the take-off of ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 135–144 : Autor(es): Foster, J., S. Nicol and S. Kawaguchi
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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 ... Paper Title: Status of the FIBEX acoustic data from the West Atlantic Abstract / Description ... consistency of krill abundance estimates derived from different survey vessels. There is a good level of ... consistency between the results from four of the vessels, Itzumi, Dr Eduardo L. Holmberg, Odissey and Walther ... factor due to the combination of data collected at 50 kHz (Walther Herwig survey) with data collected ... (Biological Investigation of Marine Antarctic Systems and Stocks) Experiment (FIBEX) (Anon., 1986). At the ... 50 kHz and the value found at a separate frequency. However, in the absence of new experimental ... . Holmberg which is now considerably higher, are the same as those presented at the 1992 meeting of WG ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 35–48 : Autor(es): Trathan, P.N. and I. Everson
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Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates
temporally controlled measures of tag-detection rates Abstract / Description: A reliable commercial fish ... tagging program is critical to the successful management of a number of toothfish fisheries in Antarctica ... an integrated stock assessment. Previous attempts to assess the relative reliability of vessels in ... detecting tagged fish have been inconclusive due to low numbers of recaptures after controlling for spatial ... fishing events of the case that were matched with at least one control event, the ratio of the scaled ... distance from the case fishing event not being equally likely to be recaptured. At distances of 20 km and ... -structured stock assessment model of Antarc- tic toothfish (Dissostichus mawsoni) to determine sustainable ... yields (Mormede et al., 2011a, 2011b; Mormede, 2011). In those analyses, the assumed values of ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Autor(es): Mormede, S. and A. Dunn