SDA measurement requires quiescent subjects and elimination of food warming costs
| Species . | Reference . | Body mass . | Diet . | SDA . |
|---|---|---|---|---|
| Kestrel (Falco tinnunculus) | 1 | 160–200 g | Whole mice | 16.6% AE |
| Tawny owl (Strix aluco) | 2 | 400–700 g | Whole mice | 8% GEI |
| Diomedea and Thalassarche albatross | This study | 2000–7000 g | Fragmented cuttlefish | 4.22±0.37% AEn (5.07±0.45% GEI) |
| Species . | Reference . | Body mass . | Diet . | SDA . |
|---|---|---|---|---|
| Kestrel (Falco tinnunculus) | 1 | 160–200 g | Whole mice | 16.6% AE |
| Tawny owl (Strix aluco) | 2 | 400–700 g | Whole mice | 8% GEI |
| Diomedea and Thalassarche albatross | This study | 2000–7000 g | Fragmented cuttlefish | 4.22±0.37% AEn (5.07±0.45% GEI) |
SDA was found to be lower in albatrosses than in comparative studies where PPMR in protein-fed adult birds of prey included some activity metabolism and possibly some cost of warming food
AE, apparent energy assimilation efficiency; GEI, gross energy intake. References: 1 (Masman et al.,1989); 2 (Bech and Præsteng, 2004)