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Fishery Report 2018: Dissostichus eleginoides Heard Island Australian EEZ (Division 58.5.2)
methodological issues in its assessment, no estimates of the IUU catch of Dissostichus spp. have been provided ... apply to this fishery. CM 33-02 specifies that there should be no directed fishing other than for the ... -off before being landed, estimates ranged from 11% to 26% of the total catch. No by-catch species was ... , the no-growth period after tagging was 0.5 years and tag-detection rate was 100%. Tag-shedding rates ...
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Fishery Report: Dissostichus eleginoides and Dissostichus mawsoni South Sandwich Islands (Subarea 48.4)
the second year of a three-year experiment. No full assessment is currently available. However, a ... removals 49. There have been no observed seabird mortalities in the Subarea 48.4 fishery (Table 9 ... . Details of the fishery .................................................................... 1 1.1 ... ......................................................................... 5 3. Assessment of the northern stock of D. eleginoides ................................. 5 ...
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On reproduction of Electrona carlsbergi (Tåning)
presents results from histological examinations of gonads of Electrona carlsbergi from the Atlantic sector ... of the Southern Ocean. From materials available it has been ascertained that E. carlsbergi spawns in ... the notal waters. Maturation of females begins when body length reaches 76 to 78 mm. Vitellogenesis is ... . Maturation of ovaries is continuous, and spawning is serial. The spawning season is long and coincides with ... diameter from 10 to 30 J.Ill1. The membrane has no structure. The cytoplasm is heterogeneous; the ... fish cannot spawn in the Antarctic zone at all or that no spawning might have occurred in the period ... gonads of Electrona carlsbergi from the Atlantic sector of the Southern Ocean. From materials available ... it has been ascertained that E. carlsbergi spawns in the notal waters. Maturation of females begins ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 397–409 : Autor(es): Mazhirina, G.P.
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Fishery Report: Dissostichus eleginoides and Dissostichus mawsoni (TOT) South Sandwich Islands (Subarea 48.4)
8. There is no information to derive an estimate of the level of IUU fishing in Subarea 48.4 ... reported 45. There have been no observed seabird or marine mammal mortalities in the Subarea 48.4 ... Sandwich Islands (Subarea 48.4) CONTENTS Page 1. Details of the fishery ... . Assessment of the northern stock of D. eleginoides ................................. 6 3.1 Mark–recapture ...
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Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone
development. The failure of the tag-recapture program to provide robust assessments in many areas and doubts ... other informative estimators for stock abundance and productivity, the review and the simulations ... enter the fishery and the remaining population continues to increase in size (and age). If there is no ... ) with 0% as a target level or 30–40% where no upper size limit exists. The proportional length-based ... come as no surprise, but simply high- light the limitations of using length-frequency data for the ... CCAMLR aims to ensure that the development of a new and exploratory fishery does not occur faster than ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Autor(es): Ziegler, P.E., D.C. Welsford and A.J. Constable
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Maximum entropy reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia, 1996–2000
survey boxes (dimensions 80 km × 100 km) north of South Georgia. The reconstructions were generated from ... line-transect acoustic survey data gathered in the boxes during austral summers from 1996 to 2000 ... . Krill densities had previously been determined at approximately 0.5 km intervals along each of the ten ... 80 km transects in each box, providing about 1 600 density estimates per box. The MaxEnt technique ... km) north of South Georgia. The reconstructions were generated from line-transect acoustic survey ... data gathered in the boxes during austral summers from 1996 to 2000. Krill densities had previously ... been determined at approximately 0.5 km intervals along each of the ten 80 km transects in each box ... , providing about 1 600 density estimates per box. The MaxEnt technique uses an iterative Bayesian approach ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 91–100 : Autor(es): Wafy, M.H., A.S. Brierley, S.F. Gull and J.L. Watkins
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e-sc-xxv-a6.pdf
... most likely not icefish. There was no information currently available on the response of icefish to a ... REPORTS ANNEX 6 REPORT OF THE SECOND MEETING OF THE SUBGROUP ON ACOUSTIC SURVEY AND ANALYSIS ... ............................................................................. 481 REVIEW OF THE FINDINGS OF THE CAMBRIDGE WORKSHOP.................. 481 NEW INFORMATION ON ... THE SCIENTIFIC COMMITTEE ......................... 492 ADOPTION OF THE REPORT
application/pdf attached to:SG-ASAM-06Meeting Report : SG-ASAM-06
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Determination of Antarctic krill acoustic back-scattering cross-section
/ Description: When determining the density krill of concentrations it is necessary to know the acoustic cross ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... signal from one specimen resolved by the hydroacoustic instrument. By calculating the mean level of the ... directivity diagramme of the antenna and the mean level of the standardized echo signal, it is possible to ... When determining the density krill of concentrations it is necessary to know the acoustic cross ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... signal from one specimen resolved by the hydroacoustic instrument. By calculating the mean level of the ... directivity diagramme of the antenna and the mean level of the standardized echo signal, it is possible to ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 141-152 : Autor(es): Protaschuk, V.A. and T.A. Lukashova
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Sexing of adult Adélie penguins by discriminant analysis of morphometric measurements
determine the sex of Adélie penguins. A sample of 46 adult birds was taken for measurement from the breeding ... population at Stranger Point (King George/25 de Mayo Is., South Shetland Islands). The sex of each bird had ... been determined earlier by means of observing the birds' breeding behaviour (first incubation ... shift). It was found that the combination of flipper breadth, bill depth and length of the middle toe ... determine the sex of Adelie penguins. A sample of 46 adult birds was taken for measurement from the ... breeding population at Stranger Point (King George/25 de Mayo Is., South Shetland Islands). The sex of ... each bird had been detennined earlier by means of observing the birds' breeding behaviour (first ... incubation shift). It was found that the combination of flipper breadth, bill depth and length of the middle ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 543–549 : Autor(es): Scolaro, J.A., Z.B. Stanganelli, H. Gallelli and D.F. Vergani
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[node:field-journal-volume]:37-51
. 10 (2003): 37–51 37 SPECIES IDENTIFICATION AND AGE ESTIMATION FOR THE RIDGE-SCALED MACROURID ... (MACROURUS WHITSONI) FROM THE ROSS SEA P. Marriott National Institute of Water and Atmospheric Research ... , Wellington New Zealand Abstract Samples of macrourid rattail by-catch from the toothfi sh fi shery in the ... confi rmation of their identity by researchers from the National Institute of Water and Atmospheric ...
Science Journal Paper : 37–51