Process based CPUE models
Project: Process based CPUE models
Project Code: SAM2004/01
Start Date: 1 October 2004
Completion Date: 30 September 2005
Overall Objectives:
-
To develop techniques to improve stock assessments of harvested fish stocks.
Specific Objectives:
-
To develop and test the effectiveness of process-based CPUE models.
Rationale:
General
General linear models (GLM) are routinely used to provide catch-per-unit-effort (CPUE) indices of relative abundance for stock assessment purposes. However, it may make more sense, for a specific fishery, to model the processes within the fishery and develop a GLM model or not as appropriate. Certainly, when a GLM model is found not to adequately fit a data set it is sensible to try alternative models before abandoning the CPUE data as a means of obtaining a relative abundance index.
This project is aimed at developing process-based CPUE models and testing their effectiveness at providing relative abundance indices. One or two case studies should be undertaken and the performance of a variety of CPUE models evaluated.
Strategic Relevance
All the objectives in this project are consistent with the Fisheries Resources goal in the Ministry of Fisheries Strategic Research Directions document.
Cost Recovery Information:
The percentage allocation for this project will be attributed to the following Fishstocks according to rule 9.2 of the Fisheries (Cost Recovery) Rules 2001:
-
All these deepwater stocks: CDL, OEO, ORH, RIB
-
All these middle depth stocks: BAR, FRO, GSH, GSP, HAK, HOK, LIN, SBW, SKI, SWA, WAR, WWA
-
All these inshore stocks: BCO, BNS, BUT, BYX, ELE, FLA, GAR, GMU, GUR, HPB, JDO, MOK, RBY, RCO, SCH, SKA, SPD, SPE, SPO, SPR, STA, TAR, TRU, YEM
The project is estimated to cost between $0 – $50,000.