
TY  - JOUR
A1  - Wang, You-Gan 
T1  - A maximum-likelihood method for estimating natural mortality and catchability coefficient from catch-and-effort data
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1999
VL  - 50
IS  - 4
SP  - 307
EP  - 311
KW  - 
UR  - https://doi.org/10.1071/MF97140 
N2  - A simple stochastic model of a fish population subject to natural and fishing mortalities is described. The fishing effort is assumed to vary over different periods but to be constant within each period. A maximum-likelihood approach is developed for estimating natural mortality (M) and the catchability coefficient (q) simultaneously from catch-and-effort data. If there is not enough contrast in the data to provide reliable estimates of both M and q, as is often the case in practice, the method can be used to obtain the best possible values of q for a range of possible values of M. These techniques are illustrated with tiger prawn (Penaeus semisulcatus) data from the Northern Prawn Fishery of Australia. 
ER  -

