Resultados de la búsqueda
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Quantitative stock survey and some biological and morphometric characteristics of the deep-sea red crab Geryon quinquedens off south west Africa
bimodal frequency distribution of female crabs was evident with modal sizes at 7.7 cm and 8.7 cm carapace ... densities occurred at depths of 472-849 m, whereas unusually high concentrations were encountered during two ... trawls at water depths of 549 and 590 m. The red crab survives at extremely low levels of dissolved ... Abstract: In order to assess the abundance of the red crab Geryon quinquedens, two otter-trawl ...
Meeting Document : WS-CRAB-93/22 : Autor(es): C.J. De B. Beyers and C.G. Wilke (South Africa)
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Revised assessment models for Patagonian toothfish in research block 58.4.3a_1 of Division 58.4.3a, Elan Bank for the years 2005–2014
CCAMLR risk 2 values at 13 tonnes and above for the shallow fishery exceed 50% toward the end of 35 year ... Abstract: We revised sensitivity runs of age-structured and two fisheries (≥1 300 m and < 1 ... 300 m) CASAL models for stock status assessments of Dissostichus eleginoides in the research block ... 58.4.3a_1 following the recommendations of the last WG-SAM meeting. Total of four runs were carried out ...
Meeting Document : WG-FSA-15/22 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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An assessment of longlining operations for Dissostichus eleginoides on board the Chilean-registered longliner BF Cisne Verde during March–May 1997 around South Georgia (Subarea 48.3)
sex were taken. Mean total length of females caught was higher than males, and length at first ... only 24% in the female population. The mean daily loss rate of toothfish observed at the hauling point ... of fish caught relative to the length at first maturity of females indicate that reproductive over ... South Georgia (Sub-area 48.3) were assessed over 48 days during April and May. All lines were set at ...
Meeting Document : WG-FSA-97/41 : Autor(es): Ashford, J.R., Everson, I.
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Escapement of elephant seal prey in the Heard Island fishery for Dissostichus eleginoides
of 3800 tonnes. Of 21 otoliths found in Elephant Seal stomachs at Heard Island that have previously ... these otoliths. The importance of Dissostichus eleginoides as prey of the Elephant seals at Heard Island ... Abstract: The Patagonian toothfish, Dissostichus eleginoides, has been reported as prey of ... Elephant seals in the Heard Island region. A question was raised at SC-CAMLR-XV concerning what affect the ...
Meeting Document : WG-EMM-97/42 : Autor(es): Slip, D., Constable, A.J., de la Mare, W.K., Williams, R.
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Investigating emigration in stock assessment models of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–H
of a cohort of tagged fish with few being recaptured after more than 3 years at liberty, a steepening ... model captured either the sharp decay in the number of tagged fish recaptured with increasing time at ... Abstract: In 2013, the Scientific Committee of CCAMLR could not achieve consensus on a stock ... the recaptures of tagged fish seen in the SSRU 88.2H fishery. The patterns showed a sharp decay rate ...
Meeting Document : WG-FSA-14/56 : Autor(es): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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Estimates of the tag loss rates for single and double tagged toothfish (Dissostichus mawsoni) fishery in the Ross Sea
the CASAL stock assessment models from the available data. Revised estimates of the rate at which ... rate after some long period at liberty, but there was no evidence of such failure in these data for ... periods of up to six years at liberty. The loss rate for double tags had been incorrectly derived and ... Abstract: The rate at which tags are lost from tagged toothfish is an important parameter in ...
Meeting Document : WG-SAM-11/18 : Autor(es): A. Dunn, M.H. Smith (New Zealand), D.J. Agnew (UK) and S. Mormede (New Zealand)
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Comparative biological characteristics of Electrona carlsbergi (Tåning) (Myctophidae) from the notal and Antarctic areas in the Southern Ocean Atlantic sector
analysed were at age 2 to the west of 35°W and 3 yr old specimens, the portion of which made up to 40% in ... fish at age 1+ (to 75%) being noted in separate catches. Essential distinctions in a nature of the ... somewhat higher,with the highest increment being observed at the 1st and 2nd years of life. Limiting age ... become mature at the 3rd year of life at 85-89 mm length. Determined differences of the length–age and ...
Meeting Document : WG-FSA-90/21 : Autor(es): K.V. Gorchinsky, V.M. Kiseleva and A.A. Filin (USSR)
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IMPROVING ESTIMATES OF ADÉLIE PENGUIN BREEDING POPULATION SIZE: DEVELOPING FACTORS TO ADJUST ONE-OFF POPULATION COUNTS FOR AVAILABILITY BIAS
Abstract: It is widely recognised that the interpretation of counts of penguin populations at ... the collection of adjustment data. This was recognised at the recent Predator Survey workshop, where ... season at which they are undertaken. While the need to adjust raw penguin count data obtained at varying ... times within a breeding season to minimise bias in estimates of the breeding population has long been ...
Meeting Document : WG-EMM-09/38 : Autor(es): C. Southwell, J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery (Australia)
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Linking acoustic scattering coefficient to krill fishery data: feasibility of estimating krill abundance using fishing survey
thinner than that at night. At the depth of over 100 m, the average NASC during the daytime is higher than ... ecosystems and supports different levels of predators. It is also an important economic species for Antarctic ... between the acoustic scattering coefficient of krill swarms and catch, catch per unit effort (CPUE), catch ... per unit fishing area (CPUA) were studied for better understanding the feasibility of assessing krill ...
Meeting Document : WG-EMM-17/44 : Autor(es): T. Wang, G.P. Zhu, J.F. Tong and L.X. Xu
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NET-BASED VERIFICATION OF ACOUSTIC TECHNIQUES USED TO IDENTIFY ANTARCTIC KRILL
at 200 and 120 kHz (Sv200-120). We considered the performance of 4 different acoustic target ... window substantially smaller than the fixed 2-16 window, will at the same time reduce the amount of ... sampled by net we calculated the difference between acoustic backscatter at 120 and 38 kHz (Sv120-38) and ... -38, (iii) ‘2 freq 2-16’- where the Sv120-38 window was fixed at 2-16 dB and (iv) ‘2 freq 2-12’- where ...
Meeting Document : WG-EMM-08/54 : Autor(es): J. Watkins and S. Fielding (United Kingdom)