TY - JOUR
T1 - Indirect economic indicators in bio-economic fishery models
T2 - Agricultural price indicators and fish stocks in Lake Victoria
AU - Simonit, Silvio
AU - Perrings, Charles
N1 - Funding Information:
This research was funded by the EC under the ECOTOOLS research project, ICA4-CT2001-10036: Tools for ecosystem resource management in eastern Africa. The assistance of Frank Kansiime, Sam Bikangaga, Deborah Kirby, and Moses Ikiara in data collection in the region is gratefully acknowledged.
PY - 2005/5
Y1 - 2005/5
N2 - We consider the potential for using prices as leading indicators of changes in stocks and yields in the freshwater capture fishery in Lake Victoria. Fertilizer run-off from agricultural land is a major cause of nutrient loading, along with soil erosion, atmospheric deposition, and point pollution from industrial and domestic affluent. The interactions between fertilizer applications, water quality, fish stocks, and yields are modelled in order to predict the effect of changes in the price of fertilizers on the fishery. The fishery model includes a measure of Chl a concentration (a proxy for phytoplankton density). The consequences of changes in Chl a concentration for fish stocks are modelled using Ecopath. We show that fertilizer prices are effective leading indicators of changes in fish biomass and yield.
AB - We consider the potential for using prices as leading indicators of changes in stocks and yields in the freshwater capture fishery in Lake Victoria. Fertilizer run-off from agricultural land is a major cause of nutrient loading, along with soil erosion, atmospheric deposition, and point pollution from industrial and domestic affluent. The interactions between fertilizer applications, water quality, fish stocks, and yields are modelled in order to predict the effect of changes in the price of fertilizers on the fishery. The fishery model includes a measure of Chl a concentration (a proxy for phytoplankton density). The consequences of changes in Chl a concentration for fish stocks are modelled using Ecopath. We show that fertilizer prices are effective leading indicators of changes in fish biomass and yield.
KW - Ecological-economic modelling
KW - Fisheries
KW - Land-water interactions
UR - http://www.scopus.com/inward/record.url?scp=17044380662&partnerID=8YFLogxK
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U2 - 10.1016/j.icesjms.2005.01.012
DO - 10.1016/j.icesjms.2005.01.012
M3 - Article
AN - SCOPUS:17044380662
SN - 1054-3139
VL - 62
SP - 483
EP - 492
JO - ICES Journal of Marine Science
JF - ICES Journal of Marine Science
IS - 3
ER -