Search results
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Environmental response of upper trophic level predators reveals a system change in an Antarctic marine ecosystem
environment have significant potential to affect populations of Antarctic krill Euphausia superba, a keystone ... foodweb species. To investigate this we analysed data on krill-eating predators from 1980-2000 at South ... Georgia. Indices of population size and reproductive performance showed declines in all species and an ... increase in the frequency of years of low reproductive output. Changes in the population structure of krill ...
Meeting Document : WG-EMM-01/21 : Author(s): K. Reid and J.P. Croxall (United Kingdom)
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Reproduction in the Antarctic icefish Champsocephalus gunnari and its implications for fisheries management in the Atlantic sector of the Southern Ocean
been reviewed and discussed in the light of existing conservation measures. Length at first spawning is ... Abstract: Available information on key reproductive parameters of Champsocephalus gunnari has ... the other South Atlantic fishing grounds. Spawning activities of Champsocephalus gunnari and those of ... other exploited species could be best protected by the establishment of permanent closed fishing season ...
Meeting Document : SC-CAMLR-VIII/BG/16 : Author(s): Delegation of Federal Republic of Germany
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Finfish research proposals for Subarea 48.6 by Koryo Maru 11 for 2012/13 (this is a revision of WG-SAM-12/12)
limited to Statistical Subarea 48.6. Preliminary assessments of Dissostichus spp. stocks in Subarea 48.6 ... north of 60°S (SSRUs 48.6A and 48.6G) and south of 60°S (SSRUs 48.6B, 48.6C, 48.6D and 48.6E) were ... conducted by OLRAC-SPS (2012) – tabled at WG-FSA-12 as a separate paper. The research plan presented here ... analysis. The preliminary assessment indicates that the historic precautionary maximum catch limit of 200 ...
Meeting Document : WG-FSA-12/30 : Author(s): C. Heiniken and R. Ball (South Africa)
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Modelling growth of Antarctic krill: a new approach to describing the growth trajectory
a step-growth function that combines models of instantaneous growth rate (IGR) at moult calibrated ... from population-level data consisting of modal lengths obtained from a time sequence of length ... frequency samples. We develop an alternative approach to predicting the trajectory of length over time using ... from direct measurements of individual pre- and post-moult krill sampled from the wild with a model of ...
Meeting Document : WG-EMM-05/27 : Author(s): S. Candy and S. Kawaguchi (Australia)
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Improving the monitoring and control of transhipments in CCAMLR
Abstract: Improving monitoring and control of transhipments continues to be a key issue for ... accountable for non-compliance by their flagged vessels. Develop and require use of a standardized ... transhipment declaration form to ensure consistent reporting between vessels. This is a requirement at many ... ): Submitted by ASOC Title: Improving the monitoring and control of transhipments in CCAMLR Microsoft Word ...
Meeting Document : CCAMLR-38/BG/46 : Author(s): Submitted by ASOC
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A nonparametric algorithm to model movement between polygon subdomains in a spatially explicit ecosystem model
effective algorithm to model movement at the polygon level is proposed, preserving the general properties of ... Abstract: Many modern spatially explicit ecosystem models use modelling subdomains of different ... shape and size (‘polygons’) to resolve space, and movement of biomass between them forms an important ... part of the modelling effort. In marine applications, a flow field grid describing the water movement ...
Meeting Document : WG-EMM-06/35 : Author(s): T. Lenser and A. Constable (Australia)
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Sensitivity analysis identifies high influence sites for estimates of penguin krill consumption on the Antarctic Peninsula
models of standing krill biomass and the design of a sustainable krill fishery for the Scotia Sea ... . Antarctic krill (Euphausia superba) is a significant component of diet for penguins breeding in this region ... in krill predation estimates. We use a comprehensive database of Antarctic penguin abundances to ... of pygoscelid penguins breeding in this region. We find that a high quality survey of Zavodovski ...
Meeting Document : WG-EMM-12/P02 : Author(s): H.J. Lynch, N. Ratcliffe, J. Passmore, E. Foster and P. N. Trathan
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Revised research plan for the 2015/16 exploratory longline fishery of Dissostichus spp. in Division 58.4.1
Abstract: The current season (2014/15) is the final one of the first three-season research which ... Petersen estimator and the CPUE x seabed analogy method. Understanding of the resource structure through ... clarification of their life history is essential to establish stock assessment and robust stock/ fisheries ... management of Dissostichus spp. population(s) in data- poor exploratory fisheries. During the second three ...
Meeting Document : WG-FSA-15/17 : Author(s): Delegation of Japan
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Research plan for the 2016/17 exploratory longline fishery of Dissostichus spp. in Division 58.4.1
estimated following the procedure recommended at the WG-FSA in 2013 in order to maximize the expectation of ... Abstract: The current season (2015/16) is the first one of the second three-season research in ... analogy method. Understanding of the resource structure through clarification of their life history is ... essential to establish stock assessment and robust stock/ fisheries management of Dissostichus spp ...
Meeting Document : WG-SAM-16/04 : Author(s): Delegation of Japan
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Research plan for the 2016/17 exploratory longline fishery of Dissostichus spp. in Division 58.4.2
estimated following the procedure recommended at the WG-FSA in 2013 in order to maximize the expectation of ... Abstract: The current season (2015/16) is the first one of the second three-season research in ... reference area sizes. Understanding of the resource structure through clarification of their life history is ... essential to establish stock assessment and robust stock/ fisheries management of Dissostichus spp ...
Meeting Document : WG-SAM-16/05 : Author(s): Delegation of Japan