Résultats de la recherche
-
Conservation Measure Conservation Measure 9/VI (1987)
de 1'Article IX de la Convention: La prise totale de C_hampsocephalus qunnari au cours de la saison 1987 ... de Conservation 7 /v , adopte par la presente la Mesure de Conservation suivante en vertu de 1'Article IX ... en trois pkriodes de declaration, a savoir: du jour 1 au jour 10, du jour 11 au jour 20 et du jour 21 ... Catch Reporting System for Champsocephalus gunnari in Statistical Subarea 48.3 Area: Subarea 48.3 ...
Conservation Measure : 9/VI (1987)
-
Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
and 4 animals, and have a relatively lower impact on catches, depressing CPUE by up to 20%. Sperm ... fishing for toothfish (Dissostichus eleginoides) around South Georgia Abstract / Description: Observer ... 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 ... types were killer whales, sperm whales and both species. An overall correction factor for the year can ... over the years 2003 to 2006, followed by two years of low interaction, and finally another year of ... , followed by two years of low interaction, and finally another year of very high interaction in 20009. The ... 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
-
Some thoughts on precautionary measures for the krill fishery
Paper Title: Some thoughts on precautionary measures for the krill fishery Abstract / Description ... : The concept of precautionary measures for krill is discussed. A precautionary catch limit, based on ... (WG-Krill) is discussed and it is concluded that such a method is appropriate in setting an overall ... refinement to provide a sufficient safeguard for land-based predators. A new approach is described which ... spawning biomass dropping below 20% of its pre-exploitation median level over a 20-year harvesting period ... is 10%; and the median krill escapement1 in the spawning biomass over a 20-year period is 75% of ... limited region close to predator colonies. Arising from this concern has been a quest for an equable way ... within Subarea 48.3, and we take this as an example to develop ideas for incorporating the requirements ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Auteur(s): Everson, I. and W.K. de la Mare
-
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
-
Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives
Paper Title: Refinements to the strategy for managing depleted fish stocks based on CCAMLR ... fish stocks to recover to levels near those giving greatest net annual increment within two to three ... that applying a policy of F 0.1 will not always lead to stock recovery in two to three decades, and ... hence that additional management policies are required for depleted stocks. The implications of these ... been put into effect the target years for recovery become fixed at 20 and 30 years after the procedure ... distribution at year 20 is the sum of the projected distributions, for the set of current stock states in the ... used for the two hypothetical fish stocks. Lower yielding stock Natural Mortality = 0.15 year! Von ... terms). SIR CV Current PL•20 > 0.95 PONAI.20 = 0.5 PGNAI.30~0.95 Stock at Stock 30 years Lower ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Auteur(s): de la Mare, W.K. and A. Constable
-
Some comments on the procedure for testing estimators of krill abundance which utilise survey data
Paper Title: Some comments on the procedure for testing estimators of krill abundance which ... provide an encouraging improvement in fits to the distribution of inter-swarm distances observed on the ... indeed likely to provide improved performance in practice. Such studies require a simple method for ... distributions from surveys. ‘Two-level’ models of krill distribution are considered. These achieve overall ... The ability of the two-level models considered to mimic an observed spatial distribution pattern for ... procedure in most circumstances. An objection that has been raised to this approach is that it is ... ; further, an underlying density trend could be argued from inspection of this plot. However, for the ... of proportionality for the two expressions of equation (2) could differ, but in the interests of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Auteur(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller
-
Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill
decision criteria for at least two of the four recruitment vectors based on net sampling, regardless of how ... 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 ... while meeting CCAMLR decision criteria for at least two of the four recruitment vectors based on net ... years and CCAMLR criteria calculated both for any given year in all years, and for only the final year ... episodic on an approxi- mately five- to six-year cycle (Siegel et al., 2003; Ducklow et al., 2007). In ... on P ro po rti on P ro po rti on P ro po rti on P ro po rti on 20 30 ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Auteur(s): Kinzey, D., G. Watters and C.S. Reiss
-
Report on attendance at the Sixth Meeting of the Committee for Environmental Protection Under the Madrid Protocol
Protected Area (SPA) completed. This year the CEP approved several plans and it was noted that two (ASPA ... the Committee for Environmental Protection (CEP-VI) under the Madrid Protocol. The most important ... (with those organizations) to seek a common approach as to how special protection for species in the ... marine environment could be achieved and how proposals under the Protocol for designating Specially ...
Meeting Document : CCAMLR-XXII/BG/11 : Auteur(s): Chair of the CCAMLR Scientific Committee
-
Effects of recruitment variability and natural mortality on Generalised Yield Model projections and the CCAMLR Decision Rules for Antarctic krill
%, 20%, or 30% were added to the observed recruitment values. The CCAMLR "depletion" decision ... below 20% of its unfished value, meeting the CCAMLR "depletion" decision rule for recruitment ... maintaining spawning biomasses above 20% of unfished biomass in more than 90% of the trials. As the values for ... Peninsula were used as proxies for recruitment variability. Simulations were run for 21 years with either no ...
Meeting Document : WG-EMM-12/26 : Auteur(s): D. Kinzey, G. Watters and C. Reiss (USA)
-
Report on fishing effort and seabird interactions during the season extension trials in the longline fishery for Patagonian toothfish (Dissostichus eleginoides) in Statistical Division 58.5.2
for the pre-season and two post season extension trials were comparable to that during the existing ... fishery for Patagonian toothfish (Dissostichus eleginoides) in Statistical Division 58.5.2 started as a ... add season extensions from 15-30 April and 15 September- 31 October to the core season. In 2015 ... , CCAMLR XXXIV (para. 5.68) endorsed new pre-season (1-14 April) and post-season (15-30 November) season ...
Meeting Document : WG-FSA-2019/31 : Auteur(s): P. Ziegler, T. Lamb, S. Wotherspoon and J. Dell