Title Digesta Passage Time, Digestibility, and Total Gut Fill in Captive Japanese Macaques (Macaca fuscata): Effects Food Type and Food Intake Level
نویسندگان
چکیده
19 Digestion is an important process in understanding the feeding ecology 20 of animals. We examined digesta passage time, digestibility, and total gut fill in 21 Japanese macaques (n = 4) under four diet conditions representing the seasonal 22 and regional variations in the diets of wild populations to determine the effects of 23 food type and food intake on these digestive features. Food type was 24 associated with mean retention time (MRT), digestibility, and total gut fill. Dry 25 matter intake (DMI) of food was positively correlated with total gut fill but not with 26 MRT or digestibility. Indigestible DMI, on the other hand, affected MRT 27 negatively. Thus, when Japanese macaques consume high-fiber foods, MRT 28 becomes shorter and digestibility is lower than eating low-fiber foods. 29 Moreover, macaques experience increases in total gut fill when they consume 30 high-fiber diets or a large amount of food. Japanese macaques may excrete 31 difficult-to-digest food components quickly: they nevertheless buffer an increase 32 in food intake by an increase in gut fill. Our study offers new insight into the 33 relationship between feeding ecology and nutritional physiology in primates by 34 simultaneously examining the effects of food type and intake level on MRT and 35
منابع مشابه
A pilot study on the ontogeny of digestive physiology in Japanese macaques (Macaca fuscata)
An assumption based on the Jarman-Bell principle suggests a positive relationship between body size and the digestive efficiency in animals, where smaller animals are less effective at digesting fibrous food due to shorter digesta passage. To examine the effect of body size within a species and explore a potential physiological background of ontogenetic diet shifts, we measured food intake, dig...
متن کاملHerbivorous reptiles and body mass: effects on food intake, digesta retention, digestibility and gut capacity, and a comparison with mammals.
Differences in the allometric scaling between gut capacity (with body mass, BM¹·⁰⁰) and food intake (with BM⁰·⁷⁵) should theoretically result in a scaling of digesta retention time with BM⁰·²⁵ and therefore a higher digestive efficiency in larger herbivores. This concept is an important part of the so-called 'Jarman-Bell principle' (JBP) that explains niche differentiation along a body size gra...
متن کاملVariation in spatial cohesiveness in a group of Japanese macaques (Macaca fuscata) Short title: Group cohesiveness in Japanese macaques Authors:
متن کامل
Japanese Macaques (Macaca fuscata) as Natural Reservoir of Bartonella quintana
Bartonella quintana bacteremia was detected in 6 (13.3%) of 45 wild-caught Japanese macaques (Macaca fuscata). Multilocus sequence typing of the isolates revealed that Japanese macaques were infected with a new and specific B. quintana sequence type. Free-ranging Japanese macaques thus represent another natural reservoir of B. quintana.
متن کاملRelationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes.
The objective of this study was to evaluate the relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes. Four Hereford steers, with an initial average BW of 136 kg, were used in an experiment conducted as a balanced 4 × 4 Latin square with 4 treatments (levels of intake) and 4 periods. Animals were fed lopsid...
متن کامل