Digestion and absorption ofEucalyptus essential oils in greater glider (Petauroide svolans) and brushtail possum (Trichosurus vulpecula)

@article{Foley2005DigestionAA,
  title={Digestion and absorption ofEucalyptus essential oils in greater glider (Petauroide svolans) and brushtail possum (Trichosurus vulpecula)},
  author={William J. Foley and Erich V. Lassak and J. J. Brophy},
  journal={Journal of Chemical Ecology},
  year={2005},
  volume={13},
  pages={2115-2130}
}
Measurements were made of the quantity and composition of the steam-volatile essential oils in gastrointestinal tract contents of greater gliders fedEucalyptus radiata foliage and brushtail possums fedE. melliodora foliage. In both species, there was less oil in the stomach contents than in an equivalent mass of foliage. Only minor losses of leaf oils occurred during mastication by greater gliders, and absorption from the stomach appeared to be the major reason for the difference in the oil… 

Ingestion and Absorption of Eucalypt Monoterpenes in the Specialist Feeder, the Koala (Phascolarctos cinereus)

It is shown that the systemic exposure of koalas to potentially anti-inflammatory eucalypt monoterpenes is continuous, and data on physiological concentrations which will allow realistic future studies of the effects of monoterspenes on immune cell function are provided.

Problems Encountered in Feeding Microencapsulated Oils to a Folivorous Marsupial, the Common Ringtail Possum (Pseudocheirus peregrinus)

A preliminary experiment with microencapsulated olive oil is reported here on a preliminary experiment in which the food intake of the animals was substantially reduced, to the point that starvation appeared imminent and the experiment was aborted.

Metabolic fate of dietary terpenes fromEucalyptus radiata in common ringtail possum (Pseudocheirus peregrinus)

The strategy used by the possum to detoxify dietary terpenes seems to be to polyoxygenate the molecules forming highly polar, acidic metabolites that can be readily excreted.

The Koala (Phascolarctos cinereus) faecal microbiome differs with diet in a wild population

It is shown that diet differences, even those caused by differential consumption of the foliage of two species from the same plant genus, can profoundly affect the gut microbiome of a specialist folivorous mammal, even amongst individuals in the same population.

Relationship Between Chemical Functional Groups on Eucalyptus Secondary Metabolites and their Effectiveness as Marsupial Antifeedants

It is concluded that at least the aldehyde groups attached to the aromatic nucleus are important in determining whether these compounds deter feeding by common ringtail possums, whereas the phenol groups may play only a minor role.

Monoterpenes as inhibitors of digestive enzymes and counter-adaptations in a specialist avian herbivore

The results suggest that specific monoterpenes may limit the protein digestibility of plant material by avian herbivores, and presents additional evidence that adaptations of digestive enzymes to plant defensive compounds may be a trait of specialist Herbivores.

Effects of Eucalypt Plant Monoterpenes on Koala (Phascolarctos Cinereus) Cytokine Expression In Vitro

It is demonstrated that natural levels of circulating eucalypt plant secondary metabolites have dose dependent in vitro effects on cytokine expression of koala peripheral blood mononuclear cells, suggesting a potential trade-off of reduced function in multiple arms of the immune system associated with koala’s use of its specialized dietary niche.

The effect of eucalyptus oils on the erythrocytes of koalas

The results indicate that koala erythrocytes are susceptible to eucalyptus oil-induced oxidative damage.

Antiherbivore Chemistry of Eucalyptus--Cues and Deterrents for Marsupial Folivores

This work describes significant qualitative and quantitative variation in FPCs in several species that are important food sources for marsupial folivores and finds strong positive correlations between terpenes generally, and several monoterpenes in particular, and F PCs.

References

SHOWING 1-10 OF 51 REFERENCES

Passage of Digesta Markers in Two Species of Arboreal Folivorous Marsupials: The Greater Glider (Petauroides volans) and the Brushtail Possum (Trichosurus vulpecula)

Selective retention of fine particles in the cecum of the greater glider may reduce the gut-filling effects of a high-fiber diet and may partly explain why this species eats a diet composed entirely of eucalypt foliage compared with the broader diet of the brushtail possum.

Ingestion and Excretion of Eucalyptus Punctata D.c. And Its Essential Oil by the Koala, Phascolarctos Cinereus (Goldfuss).

Gas-liquid chromatograms and infrared spectra of these oils are discussed and it is shown that only 7-30% of the volatile oil ingested was excreted in a steam-volatile form in the faeces and only 1% in the urine.

Evolutionary consequences of eating:Trichosurus vulpecula (marsupialia) and the genusEucalyptus

It is proposed that the “New Zealand phenomenon” can be explained by a lack, and acquisition, of plant chemical defenses against herbivores introduced from chemically more complex environments.

EFFECTS OF ESSENTIAL OILS OF SAGEBRUSH ON DEER RUMEN MICROBIAL FUNCTION

Sagebrush essential oils showed inhibitory action on several gram-positive and gram-negative bacteria, using the disc assay method, and inhibited the growth of deer rumen microorganisms in 9-ml amounts of agar media.

Antibacterial action of essential oils of Artemisia as an ecological factor. II. Antibacterial action of the volatile oils of Artemisia tridentata (big sagebrush) on bacteria from the rumen of mule deer.

The gross reactions of rumen bacteria obtained from wild, as well as captive, deer to the volatile oils seemed to be of the same magnitude; thus no adaptation by the bacteria to the oils was apparent.

Digestion in the rabbit's stomach

The stomach of the rabbit is a relatively large organ, and Carmichael, Strickland & Driver (1945) showed that even after withholding food for 24 h it remained half full. However, Elsden, Hitchcock,

Concentration of monoterpenoids in the rumen ingesta of wild mule deer.

Forage from a sagebrush-dominated winter range and rumen ingesta from mule deer wintering on this range were analyzed for monoterpenoids, finding no significant relationship between the totalmonoterpenoid content of the sagebrush accessions and digestibility.

Effects of variation in Eucalyptus essential oil yield on insect growth and grazing damage

Levels of insect attack and yields of leaf essential oils in Eucalyptus vary widely within and among species, and levels of leaf nitrogen, rather than oil content, explained differences in insect feeding and growth.

Strategies in Herbivory by Mammals: The Role of Plant Secondary Compounds

Large herbivores must select food from a wide variety of plant parts, species, and strains, and should prefer to feed on foods that contain small amounts of secondary compounds, and their body size and searching strategies should be adapted to optimize the number of types of foods available.

Studies on the Marsupial Glider, Schoinobates Volans (Kerr). 4. Feeding Biology.

Stomach contents of 133 gliders were examined for total dry weight of food, and calorific values, and it was estimated that daily food intake was 20g dry wt.
...