Search results
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Recruitment of Antarctic krill (Euphausia superba) and possible causes for its variability
abundance of the 1 + age class, varies substantially between years, whereas it is quite similar between ... in the Elephant Island area. The recruitment index (R1), based on the relative abundance of the 1 + age class ... Abstract: Between year variability of krill year class success and recruitment during the 1977 ... different surveys within the same field season. The overall mean recruitment index for all years was Rmean ...
Meeting Document : WG-EMM-95/15 : Author(s): Siegel, V., Loeb, V.
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Observations relating to IUU fishing in CCAMLR Area 58 and in the French EEZs around the Kerguelen and Crozet Islands for the 2013/2014 season and Summary of these observations over the decade 2004–2014
in operation throughout the year, no observations of IUU fishing activity were noted or reported, although ... fishing activity was directly observed by France in the above-mentioned international areas. Between 2004 ... and these efforts should be continued. Indeed, with the exception of one year, vessels on CCAMLR’s IUU list ... have been observed every year over the last ten years. The most recent interception, in 2013 ...
Meeting Document : CCAMLR-XXXIII/19 : Author(s): Délégation française
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First Annual Report of the CCAMLR Otolith Network, 2002
in age estimations between all three readers, with no evidence of biases >2 years that would indicate ... of the CCAMLR Otolith Network (CON), following the Workshop on Estimating Age in Patagonian Toothfish held ... Ageing Facility, Victoria Australia; and CQFE, each provided a sample of otoliths, processing and reading ... that the differences in preparation technique led to major biases or increases in variation in the ages estimated ...
Meeting Document : WG-FSA-02/51
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Comparison of age- and length-based harvest control rules for the South Georgia icefish (Champsocephalus gunnari) fishery
Abstract: An age-based operating model was constructed and used to derive an initial numbers ... at age vector for the population. An age-based harvest control rule was then applied using the operating ... model dynamics and assuming perfect knowledge of the resource (initial numbers at age, maturity ... and weight at age). The initial numbers at age was also converted to numbers at length, which was used ...
Meeting Document : WG-SAM-10/12 : Author(s): C.T.T. Edwards, R.M. Hillary, R.E. Mitchell and D.J. Agnew (United Kingdom)
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Distribution, demography and discard mortality of crabs caught as by-catch in an experimental pot fishery for toothfish in the South Atlantic
(>99% of P. formosa, >97% of P. spinosissima and >90% of P. anamerae) were lively on arrival ... that on the vessel which emptied pots directly onto the factory conveyor belt 85% – 90% of crabs would survive ... (>99% of P. formosa, >97% of P. spinosissima and >90% of P. anamerae) were lively on arrival on deck ... which emptied pots directly onto the factory conveyor belt 85% – 90% of crabs would survive discarding ...
Meeting Document : WG-FSA-01/32 : Author(s): M.G. Purves (South Africa), D.J. Agnew, G. Moreno, C. Yau and G. Pilling (United Kingdom)
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The Southern Ocean Observing System (SOOS): an update
and Implementation Strategy will be published in October 2011, an International Project Office has recently been ... and Implementation Strategy will be published in October 2011, an International Project Office has recently been ...
Meeting Document : CCAMLR-XXX/BG/13 : Author(s): A joint submission by SCAR and SCOR
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Chemical marking protocols for Antarctic starry skate age validation
Abstract: A field study is planned to validate the thorn ageing method for Antarctic starry skate ... and S. Parker Title: Chemical marking protocols for Antarctic starry skate age validation Microsoft Word File ... A field study is planned to validate the thorn ageing method for Antarctic starry skate (Amblyraja ... Chemical marking protocols for Antarctic starry skate age validation ...
Meeting Document : WG-SAM-2019/10 : Author(s): M. Francis and S. Parker
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INCORPORATING SAMPLING VARIATION AND RANDOM READER ERROR INTO CALCULATION OF EFFECTIVE SAMPLE SIZE IN THE APPLICATION OF AGE LENGTH KEYS TO ESTIMATION OF CATCH-AT-AGE PROPORTIONS
Abstract: Catch-at-age proportions are generally incorporated into an integrated assessment ... for both the variation associated with sub-sampling of the random length frequency (LF) sample for ageing ... , and random reader error when ageing fish. The catch-at-age ESS is estimated by dividing the ESS for the LF ... obtained from simulated samples of age frequency data. These samples are obtained using Monte Carlo ...
Meeting Document : WG-SAM-09/08 : Author(s): S.G. Candy (Australia)
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A methodology for estimating total finfish by-catch of the Area 48 krill fishery
and Notothenia rossii were used to convert total bycatch numbers to biomass at age of 50% maturity removed from ... respectively. Family specific biomass estimates at age of 50% maturity were then compared to available ... and Notothenia rossii were used to convert total bycatch numbers to biomass at age of 50% maturity removed from ... respectively. Family specific biomass estimates at age of 50% maturity were then compared to available ...
Meeting Document : WG-EMM-12/29 : Author(s): T. Peatman, S.M. Martin (United Kingdom), O.R. Godø (Norway) and R.C. Wakeford (United Kingdom)
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Collected data and stock assessment results for Notothenia squamifrons from Ob and Lena Banks, Division 58.4.4
Abstract: Catch and length/age composition data for Notothenia squamifrons from Ob and Lena Banks ... Catch and length/age composition data for Notothenia squamifrons from Ob and Lena Banks, Division ... , Division 58.4.4, are presented for the period from 1978 to 1990 split years. These data were used in VPA ... estimates for 1990 are 10.2 x 103 tonnes for Ob Bank and 20.7 x 103 tonnes for Lena Bank. These estimates ...
Meeting Document : WG-FSA-92/05 : Author(s): A.K. Zaitsev and S.M. Pronenko (Ukraine)