SeabirdFeeding [Compatibility Mode]

SeabirdFeeding [Compatibility Mode] - Mean prey size tends...

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3/16/2010 1 Seabird Feeding Ecology Pay particular attention to Figure 6.13 in Biology of Marine Birds Mean prey size tends to increase with increasing predator size as does the range (variance) in prey size taken Alcid diets are a function of body and bill size Plankton feeders 0.40 0.30 Bill width/gape Alcid Segregation 3 6 81 0 12 17 Intermediate Fish eaters 0.20 0.12 P. diomedea (trophic structure) bill size is smaller where population overlaps with a larger species, and bill size is larger where overlap is with a smaller species. Larger Intermediate (S) Puffinus diomedea Character displacement Smaller (L) Three overlapping shearwaters Prey size selection of alcids studied in captivity Fish of various sizes and shapes were offered to 3 alcid species 1. The decisive factor in prey size selection is diameter rather than length of fish 2. All three alcids preferred prey smaller than the maximum size manageable - slightly less than ½.
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SeabirdFeeding [Compatibility Mode] - Mean prey size tends...

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