TY  - GEN
ID  - heidok32308
Y1  - 2022/10//
CY  - Heidelberg
EP  - 44
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/32308/
N2  - The Nile perch fishery of Lake Victoria is regulated with a slot size and with restrictions on legal gear sizes. This study provides an assessment of the effectiveness of the the slot size regulation by simulating the Nile perch fishery with a size structured population model where the size preference of the fishery is an input into the model. The model is compared to the size structure of the Nile perch population from three empirical surveys to find agreement between the model, the bottom-trawl and the catch assessment survey, while the hydroacoustic survey predicts a different population structure. The empirical fishing mortality is 2.0% above the value that produces the maximum sustainable yield, given the empirical fishing fleet selectivity. Next to the actual fleet selectivity, three alternatives are simulated to quantify the effect of the selectivity. We find that the annual yield could be increased by 17.7% by sparing fish below 50cm.
T3  - Discussion Paper Series / University of Heidelberg, Department of Economics
KW  - Nile perch
KW  -  size-structured population model
KW  -  maximum sustainable yield
KW  -  fleet selectivity
KW  -  slot size
A1  - Kammerer, Johannes
A1  - Gomez-Cardona, Santiago
A1  - Nyamweya, Chrisphine
AV  - public
TI  - Size selective fishing: The effect of size selectivity on the equilibrium yield in the Nile perch fishery of Lake Victoria
ER  -