Browsing by Subject "CPUE"

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    Nominal longline CPUE from Gough and Nightingale lobster fisheries
    (2008) Johnston, Susan J; Butterworth, Doug S
    This document reports the nominal longline CPUE values available for Gough and Nightingale Islands from the summary sheet records. Exponential trends are fitted to the more recent data, and estimates of the annual rate of increase are presented.
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    Standardised longline lobster CPUE from Inaccessible Island for the 1996-2005 period
    (2008) Johnston, Susan J; Brandão, Anabela; Edwards, C T T; Butterworth, Doug S
    The commercial CPUE series of a resource is often used as an index of population density and consequently population abundance when modelling the dynamics of the underlying population. It is known, however, that a number of other factors besides density may influence the recorded values of CPUE. Where sufficient data exist, General Linear Mixed Model (GLMM) standardisation is able to take some of these further effects into account, thereby producing a more reliable index of abundance. This document reports the application of a GLMM standardisation to Jasus tristiani lobster catch and effort data from around Inaccessible Island for the period 1996- 2005.