Can the length composition of krill in predator diets provide information on the age-dependence of krill natural mortality?

A method is put forward which estimates the proportions by which the annual consumption of krill is split between predator species. This method uses data on the length distribution of krill from predator stomachs. The proportions estimated depend, through the krill yield model, on the schedule of krill natural mortality at age. In principle, such a method would allow inferences about this schedule to be drawn by comparing the proportions which it predicts to independent estimates based on predator abundance and food consumption studies. Some results of the method are put forward purely for illustrative purposes. Further discussions about the practicalities of obtaining reliable estimates of the inputs required by such an approach are required before it is taken further.