| Exposure of growing and adult captive cheetahs (Acinonyx jubatus) to dietary isoflavones: twenty years later. | |
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MedLine Citation:
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PMID: 20662971 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Dietary isoflavones are associated with oestrogenic and anti-oestrogenic effects, and have been linked to infertility in cheetahs. This study aimed to determine the isoflavone content of commercially prepared diets consumed by captive cheetahs. Sixteen international zoological facilities provided diets, and the isoflavone content of each diet was determined by acid hydrolysis and HPLC quantification. Proximate nutritional composition was also determined. Over half the diets analysed contained detectable concentrations of isoflavones, whereby total isoflavone content ranged from 1.75-183 mg/kg dry matter. The zoo-specific diets were calculated to deliver a median isoflavone dose of 0.07 mg/kg body weight (BW) and a maximum of 1.95 mg/kg BW to captive cheetahs. On a metabolic body weight basis this equates to a maximum of 4.90-5.43 mg/kg(0.75) . Some diets prepared for hand-rearing neonatal cheetahs could expose neonates to doses of up to 4.24 mg/kg BW (or 4.24-6.33 mg/kg(0.75) for cubs under 3 months of age). Only one of six zoo-specific diets was found to deliver isoflavones in doses shown to possess biological activity in other species. Therefore, on average, dietary isoflavones were not found in commercially prepared diets consumed by captive cheetahs in concentrations predicted to cause physiological changes. However, a small proportion of these diets, including hand-rearing formulas, contained elevated isoflavones concentrations which may influence cheetah fertility, behaviour or other physiological parameters. |
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Authors:
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K M Bell; S M Rutherfurd; W H Hendriks |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of animal physiology and animal nutrition Volume: 94 ISSN: 1439-0396 ISO Abbreviation: J Anim Physiol Anim Nutr (Berl) Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-11-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101126979 Medline TA: J Anim Physiol Anim Nutr (Berl) Country: Germany |
Other Details:
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Languages: eng Pagination: e329-38 Citation Subset: IM |
Copyright Information:
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© 2010 Blackwell Verlag GmbH. |
Affiliation:
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Institute of Food, Nutrition and Human Health, Massey University, Palmerston North, New Zealand. acinonyxkat@yahoo.com |
Export Citation:
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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