Estimating the stocking potential of fish in impoundments by modelling supply and steady-state demand

摘要: SUMMARY 1. Fish stocking is an increasingly common management tool for freshwater and marine environments often used to create maintain fisheries in closed waters. The densities at which fish are stocked can have a large impact on programme’s success sustainability. Stocking impoundment sport-fisheries, example, based social or practical factors, ecologically models needed assist the selection of that appropriate environment. 2. In this study, density calculated with numerical model balances supply prey production energetic demand fish. aims deliver outcomes over range potential objectives, by providing specific consumption scenarios represent trade-off between population abundance individual body size fisheries. 3. uses steady-state approach calculate density, optimises maintaining consistent biomass distribution encourages sustainable considering needs all cohorts. Carrying capacity represented under minimum scenario (when meet only their needs). comparison desired rate existing level assess status ‘health’ determine whether occur be sustainably increased. probability incorrectly assuming populations achieving given also estimated, ideal interpreting multiple distributions. 4. A Monte-Carlo analysis uncertainty was provide Australian bass (Macquaria novemaculeata) three impoundments various seasonal scenarios. likely rates were determined using historical densities, showed reasonable health, although one may overstocked. depended rate, there eightfold difference aimed ‘trophy’ required reach carrying capacity. 5. Model outputs agreed empirical estimates relative these impoundments, provides support model’s