Résultats de la recherche
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
fishing for toothfish (Dissostichus eleginoides) around South Georgia Abstract / Description: Observer ... and 4 animals, and have a relatively lower impact on catches, depressing CPUE by up to 20%. Sperm ... between months. Both species demonstrate an east to west migration throughout the season that is not ... cetaceans, accounting for other determinants of toothfish CPUE through a generalised linear model, it is ... South Georgia Li ne s S P W o bs er ve d (% ) 100 90 80 70 60 50 40 30 20 10 0 May ... types were killer whales, sperm whales and both species. An overall correction factor for the year can ... cetaceans observed (Table 1) it is possible to estimate the aver- age consumption per animal. For killer ... must decide how to account for what can be considered an unattributed source of fishery-related ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Auteur(s): Moir Clark, J. and D.J. Agnew
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A hypothetical life cycle for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region
Paper Title: A hypothetical life cycle for Antarctic toothfish (Dissostichus mawsoni) in the Ross ... of eggs and larvae over a 6–24 month period were investigated using an oceanic circulation model ... locations of toothfish larvae after an 18–24 month period were moderately consistent with the distribution ... probably remain in the northern area for 6–18 months before migrating back to the slope to regain condition ... , after reaching a length of about 15 cm, and an age of about 21 months, they become more benthic. For ... 70°S from December to May for all years and all vessels. Month G S I ( % ) 0 5 10 15 20 25 ... is mature at 100 cm (range 85–115 cm), which is equivalent to an age of 9–10 years (Dunn and ... adjacent slope areas. Fish mature at a length of 100–120 cm, at an age of 8–12 years, by which time they ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 35–53 : Auteur(s): Hanchet, S.M., G.J. Rickard, J.M. Fenaughty, A. Dunn and M.J. Williams
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Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited
appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited Abstract ... already heavily fished at the beginning of the 1970s. The closure of the fishery for this species in 1985 ... to provide more accurate estimates of the abundance of the species, it is suggested that an acoustic ... less than 20 min duration were disregarded. All survey data are held in the CCAMLR database. For ... , Hobart, Australia: 30 pp. Barrera-Oro, E.R. and R.J. Casaux. 1992. Age deter- mination of juvenile ... ° – 30 ° Fa lk la nd Is la nd s/ Is la s M al vi na s S ou th G eo rg ia E le ph an t ... ' –61°05' –61°10' –61°15' –61°20' –56°0' –55°30' –55°0' –54°30 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Auteur(s): Kock, K.-H., M. Belchier and C.D. Jones
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A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3
, and confidence intervals for, fish and bird catches by IUU vessels. In order to estimate an IUU catch ... there must have been at least one encounter with an FPV in a year; no encounters in a year are ... with IUU fishing. The mean and variance of fish catch rate was calculated for each area and each year ... measures. Three years were analysed: 1998/99, 1999/2000 and 2000/01. Each year fully covered the period 1 ... encounter with an FPV in a year; no encounters in a year are interpreted as zero IUU fi shing. For each IUU ... actual FPV record for a year (October to September), an IUU cruise was randomly placed within the year ... variance of fi sh catch rate was calculated for each area and each year using reported catch and effort ... analysed: 1998/99, 1999/2000 and 2000/01. Each year fully covered the period 1 October to 30 September ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Auteur(s): Agnew, D.J. and G.P. Kirkwood
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Integrated research proposal for Dissostichus spp. in Subarea 88.3 by the Republic of Korea, New Zealand and Ukraine
coordinated proposal includes a catch distribution plan for the 2019/20 season, recognizing a full review and ... the proposal in 2017. The joint research proposal was for 3 years covering the period 2017/18, 2018/19 ... an integrated proposal be developed for all three Members (SC XXXVII paragraph 3.191). This proposal ... new proposal will be required for the 2020/21 fishing season. Author(s): Delegations of the Republic ...
Meeting Document : WG-SAM-2019/02 : Auteur(s): Delegations of the Republic of Korea, New Zealand and Ukraine
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On the power to detect changes using the standard methods for monitoring parameters of predatory species
Paper Title: On the power to detect changes using the standard methods for monitoring parameters ... of predatory species Abstract / Description: The CCAMLR guidelines (CCAMLR, 1989) for analyzing the ... considered here are insufficient for conducting power analyses (penguin arrival weight A1.1, trend in penguin ... population size A3.1, penguin demography A4.1, penguin fledging weight A7.1). Alternative forms for analyses ... ) to compute the requisite sample sizes for detecting changes of 10%, 20% and 30% of the mean value ... sample sizes for detecting changes of 10%, 20% and 30% of the mean values are shown in Table 2. No ... detect changes of 10%, 20%, and 30% of the mean values for Adelie and chinstrap meal size (Table 6 ... %) 119 96 72 46 2.48 (20%) 31 25 1 9 1 3 3.72 (30%) 1 5 1 2 9 7 For Cl = 0.10: 1.24 (10%) 99 79 57 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 377–397 : Auteur(s): Boveng, P. and J.L. Bengtson
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Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in Subarea 88.2
Description / Abstract: Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in ... for those years to produce annual catch-at-age distributions (WG-FSA-16/45). In 2017, New Zealand ... and in recent years has been linked to an exemption for night setting in CM 24-02 and subject to a ... December 2014 to 30 November 2015). Fishery Report 2017: Exploratory fishery for ... fishery was an exploratory fishery for Dissostichus spp., however, in order to better align the target ...
Document : Site Section: Publications
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Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill
projections and the CCAMLR decision rules for Antarctic krill Abstract / Description: The generalised yield ... model (GYM) was used by CCAMLR to establish the precautionary catch limit for the Antarctic krill ... natural mortality rate of 0.8 and recruitment variability generated using a Beta distribution for ... proportional recruitment of krill. In this study, krill sampling data for empirical size frequencies were ... years and CCAMLR criteria calculated both for any given year in all years, and for only the final year ... whether or not the population effects associated with the pro- posed catch are acceptable. For krill in ... both criteria are met is then used to calculate the precautionary catch used as an upper limit for ... with a model for population dynamics that extended an earlier dynamic model for fisheries management ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Auteur(s): Kinzey, D., G. Watters and C.S. Reiss
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Management and assessment options for the crab fishery around South Georgia
for a conservative approach to management. Such an approach includes the use of catch/effort controls ... Paper Title: Management and assessment options for the crab fishery around South Georgia Abstract ... / Description: A new fishery for the lithodid crab, Paralomis spinosissima, started in Subarea 48.3 in 1992 ... . The fishery is also new to CCAMLR, both in terms of the species and fishing gear. We provide an ... and fishing gear. We provide an overview of the management options for crab fisheries in general and ... Convention point to the need for a conservative approach to management. Such an approach includes the use of ... aim to provide an overview of the management options for crab fisheries in general. We then ... exploitable part of the stock. The target for the Alaskan king crab is between 20 and 60% depending on ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Auteur(s): Basson, M. and D.D. Hoggarth
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Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in Subarea 88.1
Description / Abstract: Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in ... applied to the scaled length-frequency distributions for each year to produce annual catch-at-age ... years of age and can live to at least 27 years, whereas M. caml reaches full size at about 15–20 years ... December 2014 to 30 November 2015). Fishery Report 2017: Exploratory fishery for ... . Prior to 2017, this fishery was an exploratory fishery for Dissostichus spp., however, in order to ...
Document : Site Section: Publications