Search results
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
-paragraphs 5.15 to 5.17), while the second is a generalised yield model that can be used for any fish stock ... . The test used in this comparison was the summer fishing model (December-February) with y = 0.136 ... , the probability of critical depletion is examined for three different fishing seasons - summer, winter and all ... was examined for three fishing seasons as above and for three levels of y - 0.15, 0.2 and 0.4. Projections ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Author(s): Constable, A.J. and W.K. de la Mare
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Mackerel icefish biomass and distribution on the results of acoustic survey carried out in February–March 2002
of the ensonified fish, obtained by trawling. Results of acoustic estimates of icefish biomass and abundance values ... of the icefish stock, since it does not take into account the biomass of the fish distributed within higher depth ... trawling survey. In additional to the above-states estimates the abundance of juvenile fishes (speciments ... predominated. Sum abundance of young fish constituted 7344.6 million pcs. The horizontal and vertical ...
Meeting Document : WG-FSA-02/44 : Author(s): S.M. Kasatkina, V.Yu. Sunkovich, A.P. Malyshko and Zh.A. Frolkina
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On Ageing Technique for Icefish (champsocephalus gunnari Lönnberg 1905) from South Georgia Island Shelf
frequency distribution simultaneously with the measuring of otolith radii of fish taken in July-September ... to age determination of fish longer than 30 cm with an enlarged otolith centre. An age-length key ... distribution simultaneously with the measuring of otolith radii of fish taken in July-September. This was done ... determination of fish longer than 30 cm with an enlarged otolith centre. An age-length key for the third quarter ...
Meeting Document : WG-FSA-89/19 : Author(s): Zh.A. Frolkina (USSR)
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Chinstrap penguins alter foraging and diving behaviour in response to krill size
on fish, mean nighttime dive depths, and the proportion of foraging trips occurring overnight. Based ... on these patterns, we suggest that when krill were small, penguins foraged more on myctophid fish. The average krill ... that penguins made this switch to fish with a cost: more time was spent at sea foraging. Author(s): A.K. Miller ... annual size of krill was negatively correlated to the number of penguins foraging on fish, mean nighttime ...
Meeting Document : WG-EMM-07/11 : Author(s): A.K. Miller and W.Z. Trivelpiece (USA)
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Finfish distribution and abundance in Subareas 48.1 and 48.2, 2016–2018. Research proposal for the second year
made by WG-SAM-16, a new proposal is provided to determine the distribution and abundance of fish ... stratum depth. With the data obtained in each subarea, the density of fish resources will be determined ... of fish caught will continue. Author(s): Delegation of Chile Title: Finfish distribution and abundance ... -SAM-16, a new proposal is provided to determine the distribution and abundance of fish in subareas ...
Meeting Document : WG-FSA-16/31 : Author(s): Delegation of Chile
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Problems in estimating population length at age from commercial catches, the Patagonian toothfish as an example
Abstract: Age based fishery population models require information on size at age of the fished ... of the commercial catches. This information does not necessarily reflect the size at age of the fished population ... Age based fishery population models require information on size at age of the fished population ... . This information does not necessarily reflect the size at age of the fished population and may be seriously biased ...
Meeting Document : WG-FSA-01/17 : Author(s): I. Everson (United Kingdom)
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An update of the ageing program for Patagonian toothfish (Dissostichus eleginoides) at the Australian Antarctic Division, including a summary of new data available for the Integrated Stock Assessment for the Heard Island and the McDonald Islands fishery (Division 58.5.2)
to the laboratory processing of otoliths and quality control in the assignment of fish age. These changes have ... in interpretation (e.g. both readers may have counted all sub-banding for a particular fish). This year’s stock ... in 2013. The recent focus by AAD to age more large fish from commercial samples has substantially ... increased the information available on older age classes (i.e. fish greater than 20 years) available for use ...
Meeting Document : WG-FSA-14/45 : Author(s): B.M. Farmer, E.J. Woodcock and D.C. Welsford (Australia)
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On the problem of icefish (Champsocephalus gunnari) vertical migration on the South Georgia shelf
on the South Georgia shelf. It is revealed that at day time the fish distributes near the bottom ... and the maximum catches were available at the middle of the light hours of the day. At twilight the fish ... Georgia shelf. It is revealed that at day time the fish distributes near the bottom and the maximum ... catches were available at the middle of the light hours of the day. At twilight the fish concentrations ...
Meeting Document : WG-FSA-91/06 : Author(s): J.A. Frolkina and V.I. Shlibanov (USSR)
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Maturity stages for skates (Rajiformes)
manual could lead to some confusion between fish at stage 2 and stage 3 (mature). Suggestions ... a four-stage key that allows for the collection of data for fish that are at active stages ... to some confusion between fish at stage 2 and stage 3 (mature). Suggestions for updating the descriptions ... for the collection of data for fish that are at active stages of the reproductive cycle. ...
Meeting Document : CCAMLR-XXXIII/03 : Author(s): J. R. Ellis, S.R. McCully Phillips and V. Laptivovsky (United Kingdom)
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Maturity stages for skates (Rajiformes)
manual could lead to some confusion between fish at stage 2 and stage 3 (mature). Suggestions ... a four-stage key that allows for the collection of data for fish that are at active stages ... to some confusion between fish at stage 2 and stage 3 (mature). Suggestions for updating the descriptions ... for the collection of data for fish that are at active stages of the reproductive cycle. ...
Meeting Document : WG-FSA-14/33 : Author(s): J.R. Ellis, S.R. McCully Phillips and V. Laptivovsky (United Kingdom)