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THE DIGESTIVE SYSTEM OF VERTEBRATES

MAMMALS: Rabbit


Rabbit
Rabbit (photo by Dr Kerri Slifka)    < go to CD


European rabbit digestive tract
European rabbit (Oryctolagus cuniculus) digestive tract (Stevens & Hume 1995)


Mass specific metabolic rate for eutherian mammals
Figure 2.1.  Relationship between mass-specific metabolic rate (ml O2/g.h) or metabolic intensity and log of body mass for eutherian mammals ranging from 6 g shrews to 1,300-kg elephants. Note the inverse relationship between mass-specific metabolic rate and body mass. (From Schmidt-Nielsen 1984).  (CD Figure 3.1)


Passage through the gastrointestinal tract of the rabbit
Figure 6.3.  Percentage of digesta fluid and particulate markers recovered from the gastrointestinal tract of the rabbit at various times following their oral administration during feeding. Fluid markers consisted of PEG or 51Cr-EDTA.  Plastic markers consisted of polyethylene tubing with an outside diameter of 2 mm, cut into lengths of 2 mm.  S = stomach; SI = small intestine; Ce = cecum; C = colon; Fe = feces.  Particles were selectively retained by the stomach, but fluid was selectively retained by the cecum of rabbits, with a more rapid excretion of particles.  (Modified from Pickard and Stevens 1972.)  (CD Figure 7.1c)


Table 6.5.  Mean digesta retention time for herbivorous cecum fermenters  (CD Table 7.5)
Mean digesta retention time for herbivorous cecum fermenters
Although digesta retention times are affected by differences in the diet, and in the body temperatures of the bird, marsupials, and eutherian mammals, cecum fermenters retain fluid digesta as long or longer than particulate digesta. Fluid and small digesta particles are selectively retained by the cecum of small mammals with a large cecum, especially in herbivores with a well-developed colonic separation mechanism. The longer digesta retention times of the marsupials are due, partly, to their lower rate of metabolism. (modified from Stevens and Hume 1995)


Table 7.3.  (CD Table 8.3)
Chitinase activity in mammals



Table 7.5b.  (CD Table 8.6b)
Disaccharidase activity in eutherian mammals
Enzymatic activity is designated as + (present), trace or 0 (absent). Results in brackets indicate use of and alternate substrate. All data from adult specimens. (from Vonk and Western 1984 plus perissodactyla data from Roberts 1975)


Table 7.7.  (CD Table 8.10)
Proteinase activity in the pancreas of reptiles, birds and mammals
Enzyme activities expressed as the equivalent amount of bovine trypsin (casein or BAEE) or chymotrypsin (BTEE) under the same conditions. *A: 200-1,200 g RNase per gram pancreatic tissue; B: 20-100 g per gram pancreatic tissue; C: 0-20 µg RNase per gram pancreatic tissue. (from Vonk and Western 1984)


Table 7.8.  (CD Table 8.11)
Transmission of passive immunity
0, no absorption or transfer; + to +++, degrees of absorption or transfer. (from Brambell 1970)


Table 8.7a.  (CD Table 9.7a)
Short chain fatty acids in the hindgut of vertebrates
* Absorption from cecum (or ceca) alone.
Dashes indicate absence of information. Contributions of SCFA to maintenance energy were estimated from the rate of SCFA production by in vitro isotope dilution or measurements of digesta flow. Total maintenance energy was either calculated as twice the BMR or assumed to be equivalent to ad libitum digestible energy intake in captive, nonreproducing, and adult animals. (From Stevens and Hume 1995.)


Table 8.8.  (CD Table 9.8)
Vitamin requirements for growth of rabbits, guinea pigs, and mice