Browsing by Subject "gravity model"
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- ItemOpen AccessAn initial attempt at a spatially structured stock assessment for the South African hake resource including movement based on a gravity model.(2014) Rademeyer, Rebecca AThe movement model for assessing the South African hake populations which was presented to last year’s review workshop is simplified by applying the “gravity” method to model movement. This reduces the numbering of movement parameters estimated from 234 to 68. This results in recent biomass estimates which are slightly more precise and somewhat lower in both absolute terms and relative to estimated pre-exploitation levels. Areas for possible future research are discussed briefly.