Search results
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Revised growth and length-weight parameters for Antarctic toothfish in the Ross Sea region (881 & 882AB)
estimates of the von Bertalanffy growth curves, estimates of mean length at age using maximum likelihood ... approximated by the MLE mean length at age relationship rather than by the von Bertalanffy equation. Stock ... between the revised von Bertalanffy and the MLE mean length at age model. In this case, the model ... of the von Bertalanffy growth curves, estimates of mean length at age using maximum likelihood estimation ...
Meeting Document : WG-FSA-2019/11 : Author(s): A. Dunn and S. Parker
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Yet further krill yield computations
by the fishery, and higher natural mortality for younger ages of krill. Results do not differ greatly from those ... gravid females are avoided, and if natural mortality is higher for younger ages. Author(s): R.B. Thomson ... , and higher natural mortality for younger ages of krill. Results do not differ greatly from those ... gravid females are avoided, and if natural mortality is higher for younger ages. ...
Meeting Document : WG-Krill-94/23 : Author(s): R.B. Thomson and D.S. Butterworth (South Africa)
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A method for preparing large numbers of otolith sections for viewing by scanning electron microscope
Abstract: In an investigation of the age structure of a population of Notothenia coriiceps ... methods of ageing fish populations, especially for fishery work in the Antarctic where otoliths are often ... In an investigation of the age structure of a population of Notothenia coriiceps Richardson ... resolution particularly for discerning edge structures, and thus may facilitate present methods of ageing ...
Meeting Document : WG-FSA-93/07 : Author(s): J.R. Ashford, K. Robinson and M.G. White (United Kingdom)
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Assessment of toothfish in Subarea 48.3, 2006
trends and construct a model that uses age-based observations, specifically estimates of catches at age ... and construct a model that uses age-based observations, specifically estimates of catches at age derived from ...
Meeting Document : WG-FSA-06/53 : Author(s): D.J. Agnew, R. Hillary, M. Belchier, J. Clark and J. Pearce (United Kingdom)
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Further development of a spatially explicit population dynamics operating model for Antarctic toothfish in the Ross Sea region
Abstract: We present an optimised spatially explicit age-structured population dynamics operating ... population dynamics model implemented using the Spatial Population Model software (SPM), and a single sex age ... . Observations include spatially explicit commercial catch proportions-at-age, proportions mature and proportions ... We present an optimised spatially explicit age-structured population dynamics operating model ...
Meeting Document : WG-SAM-13/35 : Author(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Distribution, biological characteristic and biomass of icefish from the results of inventory trawling survey carried out by STM-8390 Atlantida in January–March 2002
foraging. Champsocephalus gunnary 22-28 cm in length at the age of 2-3 predominated on all grounds ... of the Subarea, except the north-eastern part. During the survey, specimens 15 cm in length at the age ... . Champsocephalus gunnary 22-28 cm in length at the age of 2-3 predominated on all grounds of the Subarea, except ... the north-eastern part. During the survey, specimens 15 cm in length at the age of 2 prevailed in pelagic ...
Meeting Document : WG-FSA-02/79 : Author(s): Zh.A. Frolkina and P.S. Gasiukov (Russia)
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RAPID CLIMATE CHANGE AND LIFE HISTORY: HOW PLASTIC IS THE ADÉLIE PENGUIN?
with recent rapid climate change, survivorship, fecundity, age at first breeding, and breeding success from ... life history traits associated with fecundity, but spatial variability in survival rates and the age ... to cope with recent rapid climate change, survivorship, fecundity, age at first breeding, and breeding ... rates and the age of first breeding show that Adélie populations do respond, in situ, to local ...
Meeting Document : WG-EMM-09/34 : Author(s): J. Hinke, S. Trivelpiece and W. Trivelpiece (USA)
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Preliminary results of stock estimation for D. mawsoni using CASAL in the research block 48.6_2
. The model assumes that single sex and age structured model without considering IUU. Tag release data during ... 2012–2017 was used. Catch data during 2006–2017 was used as fishery data. In the MPD, age and CPUE fit ... assumes that single sex and age structured model without considering IUU. Tag release data during ... , age and CPUE fit well. On the otherhands, fit of tag release are relatively low level, especiall ...
Meeting Document : WG-FSA-18/72 : Author(s): T. Okuda
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Influence of data quality and quantity from a multiyear tagging program on an integrated fish stock assessment
-overlap), numbers of tagged fish, duration of the tagging program, using catch-at-length or catch-at-age ... . Biomass estimates were largely unaffected by the stock depletion level; however, using catch-at-age ... of tagged fish, duration of the tagging program, using catch-at-length or catch-at-age data as auxiliary ... . Biomass estimates were largely unaffected by the stock depletion level; however, using catch-at-age ...
Meeting Document : WG-FSA-13/P03 : Author(s): P. Ziegler
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PREDICTING THE VULNERABILITY OF BENTHIC, HABITAT-FORMING ORGANISMS TO DISTURBANCE USING LIFE-HISTORY CHARACTERISTICS
characteristics. A global database of life-history characteristics, including growth rate, age, maximum size ... that are known to occur in the Southern Ocean. These data show significant relationships between growth, age ... characteristics. A global database of life-history characteristics, including growth rate, age, maximum size ... that are known to occur in the Southern Ocean. These data show significant relationships between growth, age ...
Meeting Document : WG-EMM-09/35 : Author(s): K. Martin-Smith (Australia)