Branching Out: Rabbit Models Provide Evidence for the Use of a Willow Cultivar (Salix miyabeana) as a Suitable Forage Material for Monogastric Herbivores in Zoos.

IF 2.2 3区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Ben Martin, Anna K Shoveller, Pauline A L Kosmal
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Abstract

We assessed the suitability of a willow cultivar for monogastric herbivores in zoos using a rabbit model. Thirty-six male New Zealand White × Californian rabbits at 5 weeks of age were provided with bark and leaf material from a willow cultivar, Salix miyabeana (SX61), in one of four treatments for 6 weeks: UC (unrestricted control of pelleted diet); RC (restricted control of pelleted diet); TL (restricted pellets + fresh willow leaf material); and TB (restricted pellets + fresh willow bark material). Daily feed intake and weekly weights were recorded. Fasted blood samples were taken between 8:00 and 11:00 h, and blood biochemistry and acute phase protein (APP) were quantified at the start and end of the study. After the 6-week study period, rabbits were euthanized, and liver and kidney weights were obtained to assess hepatocellular damage. Blood biochemistry results were mainly within reference ranges and suggest a lack of toxicity or cellular damage due to feeding different amounts of willow ingredients. Greater weight gain was observed in the UC group when compared to the RC (p < 0.01), TB, and TL (p < 0.05) groups at the end of the treatment period. Total dry matter (DM) intake was greater in both TB and TL treatment groups when compared to the RC group but lower than the UC group (p < 0.05) across the treatment period. At the end of the study, phosphorus, magnesium, glucose, and AST were lower in the RC group when compared to all other treatment groups (p < 0.05) with a greater blood urea nitrogen than the TL and TB groups (p < 0.01). The TL group had greater blood potassium concentrations and a lower Na:K ratio than the UC and TB groups (p < 0.01). No differences were observed in the APP response over time and among groups; only fibrinogen was greater in the RC compared to the TB group (p < 0.05). The relative liver weight was higher in the UC group when compared to TB (p < 0.05). Given these results, willow bark and leaves at a high dietary inclusion can be considered safe and effective forage materials for monogastric herbivores in zoos.

分支:兔子模型为使用柳树品种(Salix miyabeana)作为动物园单胃食草动物的合适饲料材料提供了证据。
我们使用兔子模型评估了一种柳树品种对动物园单胃食草动物的适应性。选取36只5周龄的新西兰白×加利福尼亚公兔,饲喂柳树(Salix miyabeana, SX61)的树皮和叶片材料,分为4个处理:UC(无颗粒饲料对照);RC(颗粒饲料的限制性控制);TL(受限颗粒+新鲜柳叶材料);和TB(限制颗粒+新鲜柳树皮材料)。记录日采食量和周体重。8:00 - 11:00采集空腹血样,在研究开始和结束时定量血液生化和急性期蛋白(APP)。6周研究期后,对家兔实施安乐死,取肝、肾重量,评估肝细胞损伤。血液生化结果主要在参考范围内,表明喂食不同量的柳树成分没有毒性或细胞损伤。与RC组相比,UC组的体重增加幅度更大(p
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来源期刊
Journal of Animal Physiology and Animal Nutrition
Journal of Animal Physiology and Animal Nutrition 农林科学-奶制品与动物科学
CiteScore
6.30
自引率
0.00%
发文量
124
审稿时长
2 months
期刊介绍: As an international forum for hypothesis-driven scientific research, the Journal of Animal Physiology and Animal Nutrition publishes original papers in the fields of animal physiology, biochemistry and physiology of nutrition, animal nutrition, feed technology and preservation (only when related to animal nutrition). Well-conducted scientific work that meets the technical and ethical standards is considered only on the basis of scientific rigor. Research on farm and companion animals is preferred. Comparative work on exotic species is welcome too. Pharmacological or toxicological experiments with a direct reference to nutrition are also considered. Manuscripts on fish and other aquatic non-mammals with topics on growth or nutrition will not be accepted. Manuscripts may be rejected on the grounds that the subject is too specialized or that the contribution they make to animal physiology and nutrition is insufficient. In addition, reviews on topics of current interest within the scope of the journal are welcome. Authors are advised to send an outline to the Editorial Office for approval prior to submission.
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