Incorporating the science of nutrition into the management of captive animals.
Vitamin E is an important antioxidant, and deficiency is known to impact the reproduction, growth, and immunity in many species. Dietary browse can be an important source of vitamin E for animals housed in zoological institutions; however the contribution of these items to total dietary vitamin E likely varies by browse species and across time. Our objective was to evaluate... 
The objective of this study was to obtain nutrient profiles along with insight on rates of moisture and vitamin loss in browse harvested at San Diego Zoo Global (SDZG). Ten species of browse commonly offered to colobines were manually separated into leaf and bark components for analysis at a commercial laboratory. Findings indicate that a variety of browse species and... 
Many zoological institutions are faced with challenges when developing and providing a diet for their non-ruminant browsing herbivores. The most prominent issue remains providing readily available, safe and sufficient quantities of plant material. Zoos are often forced, usually by climate, to utilize seasonally available, local, appropriate and or novel plant species in order to decrease the effort and expense required...
Browsing herbivores in zoological institutions may be severely limited in the amount of natural browse offered, especially in winter months, with implications for gastrointestinal and overall animal health. A large quantity of freshly cut willow browse (~6100 kg) was ensiled in June 2010 after chipping the product into a lined 15’ x 6’ x 6’ container with molasses (~4% of... 
Browse is an essential part of many zoo animals’ diet. Our prevailing temperate climate in Southern Ontario makes it impossible to provide enough fresh browse year round. Therefore browse is preserved by ensiling. In this research we compared harvest time, nutrient content and time of preservation. Apple (Malus domestica) was used as the sole browse plant species.Leaves, stems and immature...
Bamboo is a rapidly renewable, nutritionally stable, and in most cases, evergreen forage. Although only rivercane (Arundinaria gigantica) is native to North America, bamboo enthusiasts have imported hundreds of varieties adapted to a wide range of climates and growing zones. We have conducted macronutrient analysis on eleven temperate species collected across all seasons and have analyzed for dry matter, ash,... 
The Toronto Zoo has had moose in its collection since opening in 1974, and has since struggled with the issues of chronic diarrhea and Wasting Syndrome Complex that have been readily reported at other institutions. After numerous dietary alterations it was found that only by feeding limited amounts of an aspen–based concentrate, and no other food item, could these problems... 
Browse is an important dietary component for many herbivore diets. Animals such as giraffe, black rhino, kudu, bongo, gerenuk, porcupines and many others consume a significant amount of browse as their natural diet. Providing sufficient quantities and appropriate browse species is one of the most challenging aspects of feeding animal collections in a zoological setting. At Disney’s Animal Kingdom, we... 
The use of browse to manage dietary requirements of many animal species is becoming more important within zoological institutions. Browse can include shrubs, trees, woody vines and stems, including various plant parts like berries and flowers. Browse is important as a dietary constituent for many captive wild animals, but critical for others. It has also become essential for enrichment purposes... 
The endangered black rhinoceros (Diceros bicornis) suffers from a high rate of mortality in captivity due to conditions such as hemosiderosis and hemolytic anemia. Supplementation of the diet with native browse species rich in tannins and other iron-binding polyphenolics has been proposed as a dietary strategy for reducing iron absorption and accumulation in this population. This study examined the effect... 
According to Hoffman, ruminants can be classified as browsers (“concentrate selectors”), intermediate feeders, and grazers. Compared to grazers, browsers have different nutritional requirements to meet their specific digestive physiology needs. In general, browse may contain higher amounts of secondary plant compounds and lower fiber concentrations than many grasses. In Rotterdam Zoo, browse often consists of willow leaves and branches. However,... 
Even though Sumatran rhinoceros (Dicerorhinus sumatrensis) have been exhibited at 4 zoos in the U.S. for about 20 years, the diet is not well defined. Currently, the animals at Cincinnati Zoo & Botanical Garden (CZBG) appear in good health and condition with successful reproduction consuming a diet of the following ingredient proportions: 9-18% produce, 76-83% ficus spp., 3-5% ZNN (Zoo...
As part of an ongoing effort to develop information resources and tools integrating valuable global research, we present a database and software model that integrates feeding habits, browse usage information, nutrient composition of native and substitute foods, and captive diet records for rhinoceros species. Screen displays and output reports include: Browses/Forages Offered, Browse/Forage Nutrient Composition, Diets Fed by Zoological Facility,...
The objective of this study was to determine feasible handling methods for accurate analysis of iron binding polyphenolics. Seven methods were tested with different combinations of both onsite handling and laboratory preparation. In these methods, on-site collection included freezing the samples with liquid nitrogen or dry ice or collecting the samples fresh and returning them to the lab. Once in... 
The general term “browse” refers to harvest plant materials that are including as a component of a captive animal’s diet. These materials may satisfy a nutritional, behavioral or combination of components desired in the feeding program. The Zoological Society of San Diego (ZSSD) maintains a comprehensive list of plant species (browse) which may be used with the animal collections, however... 
The objective of this project was to determine the nutrient composition of selected browse species available and fed at the Honolulu Zoo in Hawaii, and to facilitate their use in more balanced zoo rations there and at other tropically located zoos. Samples of 26 different materials including; apple banana, areca palm, hula bamboo, golden bamboo, cape honeysuckle, coral hibiscus, dwarf...
Hemosiderosis is commonly noted in captive black rhinoceros but not free-ranging animals. Animals held in a ranch setting, offered a diet containing at least 46% browse on a dry matter basis, do not experience the same health problems as animals in zoos. It is known that plants contain polyphenolic compounds that can bind iron and make it unavailable for absorption.... 
Browse is included in the diets of many primate species, especially those that consume large portions of leaf material under free-ranging conditions. The challenge of providing a reliable source of browse is complicated by the limited availability of plant species that are nutritionally adequate, palatable, and available in suitable quantities to meet the demands of the animal collection.
Browse – the new “buzzword” within zoological communities. Browse can include shrubs, trees, woody vines and stems, including various plant parts like berries and flowers. Browse is used for nutrient supplementation, behavioral enrichment and for some animal species it is life. Browse can also mean death to animals if a wrong plant or part is fed. With all of these... 
In December of 2000, three white-mantled black colobus (Colobus guereza) housed at the Denver Zoological Gardens began showing indications of pain, and as a result, were removed from their facility and hospitalized. One animal died of gastric ulcers, however the others recovered with treatment. Light microscopic evaluation of gastric biopsies from one of the monkeys, showed inflammation of the mucosal... 
Feeding exotic herbivores under human care can be fraught with challenges in terms of replicating natural nutrient offerings, or even understanding what a normal requirement would be to maximize health. While recommendations of feeding browse to species known to consume leaves and stems of plants in the wild seems fundamental, it is important to keep in mind how variable the... 
Diet evaluations in captive browsers are often confounded by the fact that the amount of browse offered is difficult to quantify, especially if whole branches are fed. For a diet survey in captive moose (Alces alces), we established correlations between the diameter at point of cutting of a branch and the amount of foliage and edible twigs on it. 
In the wild, folivorous primates have access to leaves of many different species. At the Denver Zoological Gardens (DZG), in Denver, Colorado, Colobus guereza kikuyuensis primates consume most vegetation presented to them, thus maintenance of vegetation in an animal exhibit is challenging. It is observed that insufficient browse often results in behavior concerns such as pacing or lack of mental...
Similar to other browsing rhinos in North American facilities, health of the Sumatran or “hairy” rhinoceros (Dicerorhinus sumatrensis) in captivity appears strongly linked to dietary husbandry.1 Stool consistency problems, gastric torsion, and metabolic imbalances have been reported (M. Campbell, Sumatran Rhino Veterinary Advisor, personal communication), possibly due to inappropriate captive diets. After prolonged diet refinement to improve stool consistency, recommended...
Browse, a significant source of nutrition and enrichment for captive animals, is becoming increasingly important and more widely used. Browse includes leaves and twigs from shrubs, trees and herbaceous plants. It is supplemented to a wide range of captive animals including hoofstock, primates, pachyderms, marsupials and even avian species. Despite the importance of browse as a supplemental feed and enrichment...
Duplication of natural foodstuffs for animals in captivity can be a difficult task. While it may not be possible to provide food sources normally available in an animal’ s natural habitat, a prospective goal might be to provide similar nutrients from locally available foods. Eight species of native Texas browse were studied for adequacy as a source of browse for...
Poor nutrition has been implicated as a key factor contributing to the high levals of morbidity and mortality seen in captive populations of black rhinoceros, Diceros bicornis (Kock et al, 1992; Miller, 1993). The translocation of four adult black rhinos (2 males, 2 females) to the Intensive Management Center at Sinamatella, Hwange National Park, Zimbabwe, in January 1995 led to... 
Species differences in natural feeding habits and digestive system structure suggest that all captive primates should not be fed in the same manner.28 Primates whose diets consist primarily or exclusively of leaf material possess highly developed, and delicately balanced digestive systems, which enable them to utilize this abundant food source. The order of Primates consists of several species whose natural...