From: Seasonal variation in body mass and energy budget in Chinese bulbuls (pycnonotus sinensis)
Category | Spring | Summer | Autumn | Winter | p value |
---|---|---|---|---|---|
Sample size (n) | 23 | 23 | 24 | 18 | Â |
Digestive tract length (mm) | Â | Â | Â | Â | Â |
Gizzard | 14.6 ± 0.5b | 13.6 ± 0.5b | 13.7 ± 0.5b | 14.8 ± 0.6a | >0.05 |
Small intestines | 120.6 ± 2.0b | 115.0 ± 2.0a | 115.9 ± 2.0a | 128.6 ± 2.3c | <0.001 |
Rectum | 12.1 ± 0.5 | 12.3 ± 0.5 | 12.9 ± 0.5 | 13.2 ± 0.5 | >0.05 |
Total digestive tract | 147.4 ± 2.0b | 140.9 ± 2.0a | 142.4 ± 2.0ab | 156.7 ± 2.3c | <0.001 |
Digestive tract wet mass (mg) | Â | Â | Â | Â | Â |
Gizzard | 626.1 ± 17.3c | 547.5 ± 17.2b | 488.4 ± 17.3a | 545.9 ± 19.9b | <0.001 |
Small intestine | 1681.1 ± 69.1a | 1605.3 ± 68.5a | 1643.6 ± 68.9a | 2115.2 ± 79.9b | <0.001 |
Rectum | 145.7 ± 10.0a | 141.8 ± 9.9a | 176.7 ± 10.0b | 138.6 ± 11.5a | <0.05 |
Total digestive tract | 2452.9 ± 77.8a | 2294.6 ± 77.1a | 2308.8 ± 77.5a | 2799.7 ± 89.6b | <0.001 |
Digestive tract dry mass (mg) | Â | Â | Â | Â | Â |
Gizzard | 183.8 ± 6.1b | 156.3 ± 6.1a | 153.7 ± 6.1a | 166.3 ± 7.1b | <0.01 |
Small intestines | 303.3 ± 13.1a | 287.6 ± 12.9a | 352.5 ± 13.0b | 413.4 ± 15.0c | <0.001 |
Rectum | 24.2 ± 1.2b | 20.3 ± 1.2a | 25.5 ± 1.2b | 26.0 ± 1.4b | <0.01 |
Total digestive tract | 511.4 ± 15.8b | 464.2 ± 15.6a | 531.8 ± 15.7b | 605.7 ± 15.0c | <0.001 |