Table 1.
Descriptive statistics of performance, feeding behavior, carcass and meat quality traits, and behavioral recordings for all the mule ducks.
| N | Mean | SD | |
|---|---|---|---|
| Performance traits over the feeding test period | |||
| Residual feed intake (g/d) | 77 | 0.0 | 6.9 |
| Lipid quantity (g) | 77 | 423 | 72 |
| ABW49d (g) | 77 | 3335 | 210 |
| BW84d (g) | 77 | 4352 | 306 |
| BW96d (g) | 77 | 6001 | 361 |
| Feed intake during overfeeding (g) | 77 | 9498 | 145 |
| Total average daily gain (g/d) | 77 | 76.6 | 5.3 |
| Total feed conversion ratio | 77 | 2.54 | 0.12 |
| Feeding behavior traits over the feeding test period | |||
| Daily feed intake(t) (g) | 77 | 194 | 13 |
| Meal feed intake(t) (g) | 77 | 28.7 | 6.0 |
| Meal duration(t) (s) | 77 | 118 | 29 |
| Daily feeding time(t) (min) | 77 | 14.3 | 2.5 |
| Daily feeding rate(t) (g/min) | 77 | 15.1 | 2.6 |
| Number of meals per day(t) | 77 | 7.4 | 1.2 |
| Daily interval between meals(t) (min) | 77 | 135 | 28 |
| Carcass traits | |||
| Carcass weight (g) | 75 | 5071 | 316 |
| Liver weight (g) | 75 | 526 | 109 |
| Leg weight (g) | 74 | 478 | 44 |
| Abdominal fat (g) | 75 | 159 | 22 |
| Muscle magret weight (g) | 74 | 296 | 24 |
| Skin magret weight (g) | 75 | 166 | 26 |
| Quality traits | |||
| Fatty liver | |||
| Lipid content (% FM2) | 75 | 57.0 | 4.0 |
| Dry matter (% FM) | 75 | 67.4 | 3.2 |
| Melting rate (%) | 75 | 32 | 13 |
| Magret | |||
| lipid content (% FM) | 75 | 6.16 | 0.80 |
| Dry matter (% FM) | 75 | 27.78 | 0.69 |
| Drip loss D1-D3 (%) | 75 | 0.78 | 0.33 |
| Drip loss D3-D6 (%) | 75 | 0.46 | 0.20 |
| Drip loss D1-D6 (%) | 75 | 1.24 | 0.40 |
| Open field | |||
| Number of zones visited | 72 | 22 | 11 |
| Number of vocalizations | 72 | 103 | 53 |
| Number of long breaths | 72 | 0.32 | 0.47 |
| Number of body shaking | 72 | 2.11 | 0.93 |
| Number of wing flapping | 72 | 1.49 | 0.98 |
| Response to the presence of human | |||
| Latency to the first immobilization (s) | 72 | 6.0 | 2.9 |
| Number of zones visited | 72 | 4.9 | 2.2 |
| Number of long breaths | 72 | 0.50 | 0.50 |
| Number of vocalizations | 72 | 45 | 19 |
| Number of beak opening | 72 | 3.9 | 3.4 |
ABW49d: Average body weight at 49 d; BW84d and BW96d: body weight at 84 d and 96 d, respectively. FM: fresh matter. Behavioral traits recorded during the open field test lasting 5 min and the response to the presence of human test lasting one min.