Food Intake and Assimilation by Bobcats under Laboratory Conditions

Golley, Frank B.; Petrides, George A.; Rauber, Ernest L.; Jenkins, James H.

doi:10.2307/3798041

Cited by 48 publications

(28 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These effects were similar to those observed by Golley et al (1965) in a study of captive bobcats (Lynx rufi~s). They found that when bobcats were fed whole rabbits or chickens the calorific contents of their faeces and urine were substantially below those resulting from a low-bulk diet of deer meat.…”

Section: Consumption and Assimilation Of Foodsupporting

confidence: 75%

“…In herbivores these losses are often small compared with faecal output (Drozdz, 1968), and are ignored when calculating the proportion of ingested energy which is assimilated. To do so with carnivores, as, for example, Golley et al (1965) and Vogtsberger and Barrett (1973) have done, overestimates the energy available for growth and maintenance. Golley (1960) reported a digestive efficiency of 90% for male weasels eating…”

Section: Consumption and Assimilation Of Foodmentioning

confidence: 99%

See 1 more Smart Citation

Studies of the metabolism, food consumption and assimilation efficiency of a small carnivore, the weasel (Mustela nivalis L.)

Moors

1977

Oecologia

View full text Add to dashboard Cite

The average respiratory quotient of weasels was 0.73. There were significant differences in average daily metabolic rate (ADMR) between the sexes and six experimental temperatures. As temperature decreased the mean ADMR increased, with a relatively greater rise for females. Regression equations of ADMR on temperature were Y=483.2-9.6X kcal/kg/day for males, and Y=625.3-15.0X kcal/kg/day for females. The minimum metabolic rate measured for males was 6.6 kcal/kg/h, and the maximum 25.7 kcal/kg/h. The relationship between ADMR and body weight varied with different temperatures, but was consistent with the hypothesis that ADMR was proportional to metabolic weight. The energetic costs of activity for my captive weasels were more than 20% of their daily total energy expenditure. Data on metabolism supported the conclusion that long, thin mustelids lose heat faster than normally-shaped mammals of the same weight.The calorific contents of foods, faeces and urine from feeding trials were determined. There were significant differences in the calorific content of faeces between the sexes, and of faeces and urine between diets.Four natural foods (Microtus, Apodemus, rabbit, starling) were offered during feeding trials. Daily food consumption varied between the diets, but small weasels always ate relatively more than large ones. Mean consumption was 0.33 g/g/day for males, and 0.36 g/g/day for females. Weasels on low-bulk diets (rabbit, starling) lost at least as much energy in urine as in faeces. There were significant differences in assimilation efficiency between the sexes and diets. The average efficiency for males was 78.2%, and 79.8% for females. Bulky foods lowered assimilation efficiencies by up to 9%.Daily energy requirements for maintenance calculated from ADMR data were compared with those from feeding trials. On the Microtus diet weasels expended 18.6-30.1% more energy on maintenance than predicted by the ADMR results, whereas on the other diets they expended 2.7-31.4% less energy. Estimates from ADMR data were probably more accurate.

show abstract

Section: Consumption and Assimilation Of Foodsupporting

confidence: 75%

Section: Consumption and Assimilation Of Foodmentioning

confidence: 99%

Studies of the metabolism, food consumption and assimilation efficiency of a small carnivore, the weasel (Mustela nivalis L.)

Moors

1977

Oecologia

View full text Add to dashboard Cite

show abstract

“…This means 591 g/day which represents about 7.4% of body weight (74 g/kg/day). It is considered that this intake, halfway between the maximum values estimated for other species of the genus Lynx of similar body weight (Saunders, 1963; G o 11 e y et al, 1965;Brand et al, 1976), could be a valid approximation to the average intake of a free-living individual Spanish lynx.…”

Section: Food Requirementsmentioning

confidence: 99%

Feeding ecology of the Spanish lynx in the Coto Dońana

Delibes¹

1980

Acta Theriol.

View full text Add to dashboard Cite

“…In the case of several bear diets, a proxy for NfE was calculated using TDF rather than CF values, which were not analyzed in the respective studies. The resulting NfE values were 0%; Harris et al, 1951;Mautz, 1976, 1980;Hamor, 1983;Szymeczko and Skrede, 1991;Ball and Golightly, 1992;Barboza et al, 1994;Skrede, 1995, 1998;Dahlman et al, 2002;Ahlstrom et al, 2003;Silva et al, 2005;Childs-Sanford and Angel, 2006 Felids Acinonyx jubatus, Caracal caracal, Felis concolor, F. margarita, F. pardalis, F. viverrina, F. temminckii, Leptailurus serval, Lynx lynx, L. rufus, Neofelis nebulosa, Panthera leo, P. onca, P. pardus, P. tigris, Prionailurus bengalensis, Uncia uncia Golley et al, 1965;Morris et al, 1974;Wittmeyer Mills, 1980;Barbiers et al, 1982;Hackenburger and Atkinson, 1983;Hamor, 1983;Wynne, 1989;Allen et al, 1995;Crissey et al, 1997;Edwards et al, 2001;Bechert et al, 2002;…”

Section: Methodsmentioning

confidence: 99%

Carnivorous mammals: nutrient digestibility and energy evaluation

2010

View full text Add to dashboard Cite

Estimating the energy content is the first step in diet formulation, as it determines the amount of food eaten and hence the concentration of nutrients required to meet the animal's requirements. Additionally, being able to estimate the energy content of a diet empirically known to maintain body condition in an animal will facilitate an estimation of maintenance energy requirements. We collated data on nutrient composition of diets fed to captive wild canids, felids, hyenids, mustelids, pinnipeds, and ursids and the digestibility coefficients from the literature (45 species, 74 publications) to test whether differences in protein and fat digestibility could be detected between species groups, and whether approaches suggested for the estimation of dietary metabolizable energy (ME) content in domestic carnivores (NRC [2006] Nutrient requirements of dogs and cats. Washington, DC: National Academy Press.) can be applied to wild carnivores as well. Regressions of digestible protein or fat content vs. the crude protein (CP) or fat content indicated no relevant differences in the digestive physiology between the carnivore groups. For diets based on raw meat, fish, or whole prey, applying the calculation of ME using "Atwater factors" (16.7 kJ/g CP; 16.7 kJ/g nitrogen-free extracts; 37.7 kJ/g crude fat) provided estimates that compared well to experimental results. This study suggests that ME estimation in such diets is feasible without additional digestion trials. For comparative nutrition research, the study implicates that highly digestible diets typically fed in zoos offer little potential to elucidate differences between species or carnivore groups, but research on diets with higher proportions of difficult-to-digest components (fiber, connective tissues) is lacking.

show abstract

Food Intake and Assimilation by Bobcats under Laboratory Conditions

Cited by 48 publications

References 4 publications

Studies of the metabolism, food consumption and assimilation efficiency of a small carnivore, the weasel (Mustela nivalis L.)

Studies of the metabolism, food consumption and assimilation efficiency of a small carnivore, the weasel (Mustela nivalis L.)

Feeding ecology of the Spanish lynx in the Coto Dońana

Carnivorous mammals: nutrient digestibility and energy evaluation

Contact Info

Product

Resources

About