Resultados de la búsqueda
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
yield model and the generalised yield model (GYM), are currently available to CCAMLR that can be used ... biomass is known prior to a projection so that in each trial a direct assessment can be made of (i ... needs to be estimated prior to each trial in order for it to be based on the parameters for that trial ... for estimating yields according to decision rules that relate spawning stock status to the median ... variability will mean that this will not be achieved but it should be very closely approximated with a very ... generalised yield model (GYM), are currently available to CCAMLR that can be used for estimating yields ... projection so that in each trial a direct assessment can be made of (i) whether the stock became critically ... be based on the parameters for that trial. The krill yield model uses a biased estimate of the ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Autor(es): Constable, A.J. and W.K. de la Mare
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Otolith chemistry reveals local population structure of Antarctic toothfish (Dissostichus mawsoni) within the CCAMLR Subarea 48.6
with ontogeny and different between spawning/hatching ground and the area that fish captured. Otolith ... Abstract: Antarctic toothfish Dissostichus mawsoni is an important fish species with ecological ... and economical value and that distributed in the high latitude of the Southern Ocean. The CCAMLR ... management of toothfish fishery. The chemistry in the otolith can often be used to distinguish population ...
Meeting Document : WG-FSA-18/75 : Autor(es): L. Wei, G.P. Zhu, S. Somhlaba, X.Y. Yu and M. Duan
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Spawning activity of mackerel icefish at South Georgia
location is unknown and there are indications that there may be a second limited spawning season in October ... fisheries and research surveys. It is concluded that there is strong evidence for inshore spawning during ... intensity almost certainly occurs over much of the shelf although the intensity appears to be small in ... comparison with inshore spawning. There is some evidence for spawning at Shag Rocks although the precise ...
Meeting Document : WG-FSA-00/27 : Autor(es): I . Everson, A. North (United Kingdom) and K.-H. Kock (Germany)
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UPDATE OF THE INTEGRATED STOCK ASSESSMENT FOR THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS USING CATCH-AT-AGE DATA AND TWO YEARS OF SURVEY ABUNDANCE-AT-AGE DATA
with readability score of at least 4 can be obtained in sufficient numbers to allow ALKs to be ... commercial catches with catch-at-age proportions using age length keys (ALKs) where the ALK for each ... combination of fishery and year had available at least 50 aged fish. For the trawl fisheries that were divided ... ) samples for each fishing period within that year. For years where insufficient fish were aged the catch-at ...
Meeting Document : WG-SAM-09/09 : Autor(es): S.G. Candy (Australia)
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Assessment models for Patagonian toothfish in research block 58.4.4b_1 (SSRU 58.4.4bC) for the years 1990-2014
year in OB_1a model were spurious. This suggests that Shinsei-maru No. 3 was learning operation in its ... tonnes. We recommend this model be used as management advice. Author(s): K. Taki (Japan), S. Mormede ... (New Zealand) and T. Ichii (Japan) Title: Assessment models for Patagonian toothfish in research block ...
Meeting Document : WG-SAM-15/25 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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Setting management goals using information from predators
points that can be used directly for making decisions. These indicators include univariate indices ... be set for higher trophic levels – such as marine mammals, birds and fish. It briefly explores the ... management, noting that the emphasis for managing the effects of human activities on higher trophic levels is ... biased towards fisheries-based approaches rather than approaches that take into account the maintenance ...
Meeting Document : WG-EMM-07/P7 : Autor(es): A. Constable (Australia)
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Some comments on the procedure of krill target strength assessment in echosurveys
in echosurveys is discussed. It is known that krill abundance and biomass estimation should be ... requires another approach to echosurveys, since two actually independent task should be solved in that case ... considered as two independent tasks with different requirements to midwater trawl utilization in echosurveys ... measuring system. However, the information obtained in that case provides not only total krill abundance ...
Meeting Document : WG-EMM-98/21 : Autor(es): S.M. Kasatkina (Russia)
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Mapping trends in activity of illegal, unreported and unregulated (IUU) fishing in the CAMLR Convention Area
EEZs. With the information currently provided to the Secretariat it may not be possible to distinguish ... vessels, by developing a better understanding of the probability that another vessel will be detected, is ... the CAMLR Convention Area. Combining all information available to the Secretariat indicates that IUU ... between an apparent decrease in IUU catch and a decrease in surveillance effort that results in fewer ...
Meeting Document : CCAMLR-XXXII/BG/09 Rev. 1 : Autor(es): Secretariat
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Krill Fishery Report
Abstract: At WG EMM-2013 the Working Group agreed that it would be useful to have a consolidated ... the preparation of a draft krill fishery report for consideration at WG EMM-14 that would be similar ... summary of information related to the krill fishery in a similar format to the fishery reports that are ... seabirds as well as the CCAMLR approach to management of the krill fishery) with the addition of monthly ...
Meeting Document : WG-EMM-15/30 : Autor(es): CCAMLR Secretariat
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On the problem of Soviet krill fishery allocation and intensity in the area of Elephant Island in the season of 1988-1989
period. The highest catch per-unit-of-effort was observed in January (7.7 t per hour of trawling in ... average), and the lowest in November (3.5 t per hour of trawling in average). Fisheries tacktics follows ... periods showed that fleet operation areas in general overlap the minor part of foraging zones for animals ... , preyed on krill. Based on this and taking in account low fishery intensity the conclusion was made that ...
Meeting Document : WG-CEMP-92/30 : Autor(es): V.A. Sushin and A.S. Myskov (Russian Federation)