Search results
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An index of per capita recruitment
higher values such that the dynamic range of PCR is largest with high values of R1; increasing M tends to ... Abstract: An index of per capita recruitment (PCR) is proposed such that Ri PCRy–1 = R1y/(1–R1y ... postulated to affect it. The formulation of PCR is based on the assumptions that: 1) post-recruit mortality ... the population is available; and 4) the proportion of age-1 animals in the sample can be determined ...
Meeting Document : WG-EMM-99/50 : Author(s): R. Hewitt (USA)
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Integrating Climate and Ecosystem Dynamics in the Southern Ocean (ICED) programme: Preliminary report of the ICED–CCAMLR Projections Workshop, 5 to 7 April 2018
of conservation and management strategies that anticipate and adapt to potential changes in krill ... associated with climate variability and change in CCAMLR’s decision making ’ held at CCAMLR Headquarters, 5-7 ... processes that are important within Area 48. As a result of that uncertainty, signals of projected changes ... distribution shifts and reconfiguration of food webs, with both positive and negative effects. The Workshop ...
Meeting Document : WG-EMM-18/09 : Author(s): E.J. Murphy, N.M. Johnston, S.P. Corney and K. Reid
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Influence of tag numbers, size of tagged fish, duration of the tagging program, and auxiliary data on bias and precision of an integrated stock assessment
simulation study indicated that: (1) A high tag size-overlap (at least 60%, better 100%) and high tagging ... assessments with good quality tagging data had a low bias and reasonable precision for SSB 0 and annual SSB ... fished stock. (4) This modeling framework appears to be useful for evaluating data sampling strategies ...
Meeting Document : WG-SAM-12/24 : Author(s): P.E. Ziegler (Australia)
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Marine Protected Area planning by New Zealand and the United States in the Ross Sea region
workshop and discussions with other Members, be used to inform the development of one or more formal MPA ... collaboration with each other, to design MPA scenarios in the Ross Sea region. The paper presents separate MPA ... scenarios by New Zealand and by the United States consistent with their own planning processes and ... conservation objectives. It is the intention of both Members that these scenarios, following review by the MPA ...
Meeting Document : WS-MPA-11/25 : Author(s): B.R. Sharp (New Zealand) and G.M. Watters (USA)
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Proposal for the creation of a Domain 1 MPA Expert Group
region, coupled with the difficulties associated with disentangling the different factors driving such ... the WG-EMM-17, the Working Group agreed with the proposal to create a Domain 1 MPA Expert Group (WG ... presents the draft Terms of Reference to be discussed during its 2017 meeting. In this regard, Argentina ... and Chile propose that the Scientific Committee considers the creation of a Domain 1 MPA Expert Group ...
Meeting Document : SC-CAMLR-XXXVI/19 : Author(s): Delegations of Argentina and Chile
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Estimation of natural mortality using catch-at-age and aged mark-recapture data: a simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation
Abstract: Attempts to estimate natural mortality, as a single constant M, simultaneously with ... . The model based on a new mortality equation (CCODE model) uses an ODE with constant within-year catch ... per unit time for each age class, and as a result allows catch to be removed directly from the ... fishery that is not substantially depleted within any single fishing season, given fishers tend to ...
Meeting Document : WG-SAM-10/11 Rev. 1 : Author(s): S.G. Candy (Australia)
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Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (CCAMLR Subarea 48.3), Antarctica, during austral winter from 2002 to 2008
. anderssoni and G. nicholsi from larvae to adults were found, suggesting that these species may have their ... samples. Additionally, the size distribution of P. choriodon was unimodal, indicating that individuals in ... warmer areas. Author(s): T. Iwami, M. Naganobu, K. Taki and M. Kiyota (Japan) Title: Annual changes in ...
Meeting Document : WG-EMM-10/22 : Author(s): T. Iwami, M. Naganobu, K. Taki and M. Kiyota (Japan)
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Variation in the diet of the blue-eyed shag Phalacrocorax atriceps throughout the breeding season at Half-Moon Island, South Shetland Islands
important in mass (79%), followed by N. nudifrons and T. newnesi. The overall composition of the diet was ... qualitatively and quantitatively similar to that reported for the 1992/93 austral summer at the same colony ... . However, the pellet analysis throughout the 1993/94 breeding season showed that large N. coriiceps were ...
Meeting Document : WG-EMM-95/78 : Author(s): Barrera-Oro, E., Casaux, R.
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An iterative model to construct an age-length key to assess the age composition of a new fishery for Dissostichus eleginoides in Chilean waters
Abstract: Traditional calculation of catch age composition estimate requires that the age-length ... data and random length frecuency be sampled from the same population, in other case an age-length key ... with the aplication of a single age-length key to all monthly length distribution using the nonlinear ...
Meeting Document : WG-FSA-92/23 Rev. 1 : Author(s): H. Robotham V. and Z. Young U. (Chile)
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Interannual variation to the gonad cycle of the mackerel icefish
Abstract: Spawning by Antarctic fish is generally considered to be seasonal and restricted to a ... brief period during the autumn and winter. Arising from this it has been assumed that the gonadal ... variation are discussed with respect to feeding conditions. Author(s): I. Everson (United Kingdom), K.-H ...
Meeting Document : WG-EMM-00/45 : Author(s): I. Everson (United Kingdom), K.-H. Kock (Germany) and J. Ellison (United Kingdom)