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1. Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects

   CCAMLR areas is to model the haul-by-haul ratios of catch to effort as the response variable in a ... generalised linear model (GLM) with a square-root link function and a unit variance function. A time series of ... function. An alternative GLM with a more rigorous theoretical basis is introduced here. Catch is modelled ... as the response variable using a GLM with a power variance function, with the power parameter (λ ... in a generalised linear model (GLM) with a square-root link function and a unit variance function. A ... inverse-link function. An alternative GLM with a more rigorous theoretical basis is introduced here ... . Catch is modelled as the response variable using a GLM with a power variance function, with the power ... parameter (λ) estimated using a profi le extended quasi-likelihood, and a log link function with log of ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Autor(es): Candy, S.G

2. Estimating krill recruitment and its variability

   Paper Title:  Estimating krill recruitment and its variability Abstract / Description:  A maximum ... recruits in a population sampled by a net haul survey. Preliminary results from a series of five net haul ... surveys in the South Atlantic and the Indian Ocean sectors of the Southern Ocean give a mean recruitment ... and above) of 0.339 with a standard deviation (SD) of 0.100. The corresponding result for recruitment ... 7050 Tasmania, Australia Abstract A maximum likelihood method is developed for the decomposition ... of krill density-at-length data into the proportion of recruits in a population sampled by a net ... haul survey. Preliminary results from a series of five net haul surveys in the South Atlantic and the ... Indian Ocean sectors of the Southern Ocean give a mean recruitment rate for l+ krill (the ratio of the ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Autor(es): de la Mare, W.K

3. Selectivity of standard Polish commercial trawl codends on Antarctic fishing grounds

   commercial fishery, with a nominal mesh size A = 80 mm and A = 100 mm, made of double twines with a thickness ... Chionodraco rastrospinosus exhibit a lower tendency to pass through meshes of the codend than Antarctic ... icefish and bumphead notothenia. The solution to the problem of ensuring selectivity of codends at a ... sufficiently good level seems possible as a result of the application of webbing with permanently open meshes ... carried out for two types of steelon codends used in commercial fishery, with a nominal mesh size A = 80 ... mm and A = 100 mm, made of double twines with a thickness of 4.2 mm. The studies covered 6 major ... rastrospinosus exhibit a lower tendency to pass through meshes of the codend than Antarctic icefish and bumphead ... notothenia. 3. The solution to the problem of ensuring selectivity of codends at a sufficiently good level ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 107-142 : Autor(es): Zaucha, J.

4. Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)

   Island) have made possible a review of the status of the various harvested fish stocks. Since 1984, an ... Notothenia rossii, a species which is at present only fishable as a by-catch. The total biomass of the stock ... 1982) in a comparable period. The stock of Notothenia squamifrons shows a very low biomass value in ... 1987 and 1988. After a continuous reduction in average length since the creation of the EEZ, a slight ... /87 to 1988/89 in Division 58.5.1 (Kerguelen Island) have made possible a review of the status of ... abundance of the juvenile section of the stock of Notothenia rossii, a species which is at present only ... fishable as a by-catch. The total biomass of the stock, however, remains very low according to the ... observed for the two preceding cohorts (1979 and 1982) in a comparable period. The stock of Notothenia ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Autor(es): Duhamel, G.

5. The use of predator-derived krill length-frequency distributions to calculate krill target strength

   performance is fundamental to an ecosystem-based approach to resource management. We propose a method using ... krill sampled from the diet of predators to provide a length-frequency distribution of krill at times ... , i.e during logistic/resupply operations. This will allow a robust estimate of krill abundance to be ... calculated from acoustic data. Changes in the lengthfrequency distribution of krill over a period of a few ... resource management. We propose a method using krill sampled from the diet of predators to provide a ... systems but not to conduct scientific netting, i.e during logistic/resupply operations. This will allow a ... - frequency distribution of krill over a period of a few weeks produced a 10% difference in TS, whereas ... simultaneous samples from predators and nets produced only a 1% difference, illustrating the need for ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Autor(es): Reid, K. and A.S. Brierley

6. Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia

   gunnari around South Georgia Abstract / Description:  The effects of a number of harvesting strategies on ... the mackerel icefish (Champsocephalus gunnari) have been simulated for a period of 30 years. These ... 50% F 0.1 with F increasing three or five years after a good recruitment; pulse fishing at an ... interval of three years with no fishing in between; and changes in net selectivity resulting in a shift in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Autor(es): Köster, F.W. and K.-H. Kock

7. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

   (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status ... , and an algorithm for specifying the levels of regulatory mechanisms (e.g., a catch control law) that ... depends on the results of the assessment. The development and selection of a procedure requires a basis ... on the Krill CPUE Simulation Study. Annual TACs are restricted to an initial ceiling (C c) for a five ... 48.3 requires a basis for the assessment of resource status, and an algorithm for specifying the ... levels of regulatory mechanisms (e.g., a catch control law) that depends on the results of the ... assessment. The development and selection of a procedure requires a basis for the simulation testing of ... . Annual TACs are restricted to an initial ceiling (Cc) for a five year period, with a reference CPUE ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Autor(es): Butterworth, D.S.

8. Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands

   1990/91 a survey was conducted by RV Kaiyo Maru in the vicinity of the South Shetland Islands and ... chlorophyll a. Water circulation was studied with satellite-tracked buoys equipped with curtain drogues ... deployed at a level of 30 m from the surface because at this level krill concentrations are most frequently ... of buoys demonstrated the existence of convergent complex eddies in shelf waters of these islands. A ... ISLANDS T. Ichii, H. Ishii and M. Naganobu* Abstract In December/February 1990/91 a survey was ... . Phytoplankton distribution was assessed by measuring surface concentrations of chlorophyll a. Water ... circulation was studied with satellite-tracked buoys equipped with curtain drogues deployed at a level of 30 ... demonstrated the existence of convergent complex eddies in shelf waters of these islands. A high concentration ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Autor(es): Ichii, T., H. Ishii and M. Naganobu

9. Histological study on the ovarian development of mackerel icefish (Champsocephalus gunnari) from the South Georgia Islands

   gunnari) from the South Georgia Islands Abstract / Description:  A histological analysis was carried out ... identified, and these are similar to those described for other species. A gonad maturation scale for studies ... oocyte resorption processes, which macroscopically resemble a maturity phase but microscopically conform ... to a regression stage. In some cases these ovaries presented few atretic oocytes; in others a ... . Barrera-Oro Instituto Antkrtico Argentino Cerrito 1248,1010 Buenos Aires Argentina Abstract A ... oocyte development were identified, and these are similar to those described for other species. A gonad ... includes ovaries undergoing oocyte resorption processes, which macroscopically resemble a maturity phase ... but microscopically conform to a regression stage. In some cases these ovaries presented few atretic ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 35–49 : Autor(es): Macchi, G.J. and E.R. Barrera-Oro

10. Some principles for fisheries regulation from an ecosystem perspective

    / Description:  The paper discusses some principles to be considered in the formulation of a framework for the ... regulation which have a more rigorous scientific interpretation than the broad principles of conservation set ... objectives are being met to be assessed. The advantages of using a feedback method of regulation are ... required for the abundance of a stock in advance of the substantial development of a fishery. The design of ... principles to be considered in the formulation of a framework for the. regulation of fisheries from an ... important task in this formulation is to derive subsidiary objectives for regulation which have a more ... be assessed. The advantages of using a feedback method . of regulation are discussed. However ... for the abundance of a stock in advance of the substantial development of a fishery. The design of a ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Autor(es): de la Mare, W.K.

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