Browsing by Subject "GLM analyses"

Now showing 1 - 3 of 3
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    The catch and effort data to be used in GLM analyses to produce CPUE indices for the four islands of the Tristan da Cunha group
    (2009) Johnston, Susan J; de Decker, M
    The Tristan da Cunha group of islands consist of the main island of Tristan da Cunha, and three outer islands – Gough, Nightingale and Inaccessible. Fishing at the outer islands uses two methods – longlining and powerboats – although longlining is the predominant method. Fishing around Tristan is normally by powerboats only. Fishing data are recorded differently for the outer islands and for Tristan, and are thus treated separately.
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    Further analyses of the GLM trends for M. paradoxus and M. capensis
    (2008) Glazer, Jean Patricia; Butterworth, Doug S; Leslie, R W
    This paper takes a closer look at CPUE analyses, particularly with a view towards determining the reason for the sharp decline in the standardized CPUE index from 2006 to 2007 for M. capensis. Results from including and excluding night-time trawls are also presented from an analysis of data covering the period 2000-2007.
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    Open Access
    Updated GLM analyses of Area 8+
    (2011) Glazer, Jean Patricia; Butterworth, Doug S
    The existing standardized CPUE indices for trapboats and bakkies in Area 8 comprise data from Area 8 only and an ad hoc adjustment is made to accommodate the movement of lobster into the area East of Hangklip (Areas 12-14) by increasing the size of Area 8 over a period of time. Recently Glazer and Butterworth (2010) presented results from GLM analyses applied to data from Area 8+ (Areas 8, 10-14) for the two methods of fishing. Updated results are presented here and a method is applied whereby the indices of abundance derived from the Area 8 and Area 8+ analyses are combined to provide a composite index of abundance for trapboats and bakkies respectively.