Qualitative and quantitative tabulation of the time course of digestion from sampling of four sections of the gastrointestinal tract of the dogfish shark at various times after feeding
| Time after meal (h) . | N . | Stomach-1 . | Stomach-2 . | Intestine . | Colon . |
|---|---|---|---|---|---|
| 6 | 7 | Large mass of solid, some liquid chyme | Large mass of solid, some liquid chyme | Yellow-brown fluid | Empty |
| 36.6±5.2 (a,A) | 17.3±7.0 (a,B) | 6.2±1.1 (a,C) | 0.0±0.0 (a,D) | ||
| 20 | 6 | Smaller mass of solid, more liquid chyme | Greater mass of solid, more liquid chyme | Similar amount of yellow-brown fluid, but pastier | Empty |
| 22.0±12.8 (a,b,A) | 48.5±11.5 (a,B) | 7.3±1.3 (a,A) | 0.0±0.0 (a,C) | ||
| 30 | 7 | Smaller mass of solid, smaller amount of liquid chyme | Smaller mass of solid, similar amount of liquid chyme | Similar amount of yellow-brown fluid-paste | Empty or small amount of dark paste |
| 4.2±2.5 (b,c,A) | 17.9±5.8 (a,B) | 6.2±2.2 (a,A) | 0.2±0.1 (a,A) | ||
| 60 | 6 | Little solid (mainly bone), similar amount of chyme or clear fluid | Similar mass of solid (mainly bone), similar amount of liquid chyme | Similar amount of yellow-brown fluid-paste, small pieces of bone | Empty or small amount of dark paste |
| 5.5±2.9 (b,A) | 18.6±7.2 (a,B) | 5.6±1.3 (a,A) | 0.1±0.1 (a,A) | ||
| 120 | 8 | Very small volume of clear fluid only | Very small volume of clear fluid only | Very small volume of watery yellow-brown fluid, tiny pieces of bone | Empty |
| 0.9±0.4 (c,A) | 0.4±0.1 (b,A) | 0.5±0.1 (b,A) | 0.0±0.0 (a,A) | ||
| 360 | 8 | Very small volume of clear fluid only | Very small volume of clear fluid only | Very small volume of watery yellow-brown fluid | Empty |
| 0.4±0.1 (c,A) | 0.3±0.1 (b,A) | 0.2±0.1 (b,A) | 0.0±0.0 (a,A) |
| Time after meal (h) . | N . | Stomach-1 . | Stomach-2 . | Intestine . | Colon . |
|---|---|---|---|---|---|
| 6 | 7 | Large mass of solid, some liquid chyme | Large mass of solid, some liquid chyme | Yellow-brown fluid | Empty |
| 36.6±5.2 (a,A) | 17.3±7.0 (a,B) | 6.2±1.1 (a,C) | 0.0±0.0 (a,D) | ||
| 20 | 6 | Smaller mass of solid, more liquid chyme | Greater mass of solid, more liquid chyme | Similar amount of yellow-brown fluid, but pastier | Empty |
| 22.0±12.8 (a,b,A) | 48.5±11.5 (a,B) | 7.3±1.3 (a,A) | 0.0±0.0 (a,C) | ||
| 30 | 7 | Smaller mass of solid, smaller amount of liquid chyme | Smaller mass of solid, similar amount of liquid chyme | Similar amount of yellow-brown fluid-paste | Empty or small amount of dark paste |
| 4.2±2.5 (b,c,A) | 17.9±5.8 (a,B) | 6.2±2.2 (a,A) | 0.2±0.1 (a,A) | ||
| 60 | 6 | Little solid (mainly bone), similar amount of chyme or clear fluid | Similar mass of solid (mainly bone), similar amount of liquid chyme | Similar amount of yellow-brown fluid-paste, small pieces of bone | Empty or small amount of dark paste |
| 5.5±2.9 (b,A) | 18.6±7.2 (a,B) | 5.6±1.3 (a,A) | 0.1±0.1 (a,A) | ||
| 120 | 8 | Very small volume of clear fluid only | Very small volume of clear fluid only | Very small volume of watery yellow-brown fluid, tiny pieces of bone | Empty |
| 0.9±0.4 (c,A) | 0.4±0.1 (b,A) | 0.5±0.1 (b,A) | 0.0±0.0 (a,A) | ||
| 360 | 8 | Very small volume of clear fluid only | Very small volume of clear fluid only | Very small volume of watery yellow-brown fluid | Empty |
| 0.4±0.1 (c,A) | 0.3±0.1 (b,A) | 0.2±0.1 (b,A) | 0.0±0.0 (a,A) |
Values (means ± 1 s.e.m.) are the relative mass (g kg-1body weight) of the contents in each segment.
Note: qualitative comparisons are with respect to conditions in the same compartment at the preceding sample time.
Within the same compartment, values sharing the same lower-case letter are not significantly different (P>0.05).
Within the same time, values sharing the same upper-case letter are not significantly different (P>0.05).