Spatial variation in a top marine predator’s diet at two regionally distinct sites
Fig 2
Modified Costello-Amundsen plots.
Plots of all prey in terms of their occurrence and importance by number for GBI (upper frame) and WH (lower frame). Species occurring in the upper left represent prey that were consumed rarely, but when they were consumed, accounted for a large proportion of the predators’ diet. Species in the lower left denote prey that occurred rarely and were of relatively low importance to the overall diet. Species occurring in the upper right represent important prey found within the majority of diet samples that also accounted for a large part of the total diet. Finally, despite occurring in high frequencies, those prey species located towards the lower right corner of the diagram, only made a small contribution to the diet.