首页> 外文期刊>The Journal of Experimental Biology >Controlled feeding experiments with diets of different abrasiveness reveal slow development of mesowear signal in goats (Capra aegagrus hircus)
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Controlled feeding experiments with diets of different abrasiveness reveal slow development of mesowear signal in goats (Capra aegagrus hircus)

机译:不同磨料饮食的受控喂养实验揭示了山羊(Capra Aegagrus Hircus)中MesoWear信号的缓慢发展

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摘要

Dental mesowear is applied as a proxy to determine the general diet of mammalian herbivores based on tooth-cusp shape and occlusal relief. Low, blunt cusps are considered typical of grazers and high, sharp cusps typical of browsers. However, how internal or external abrasives impact mesowear, and the time frame the wear signature takes to develop, still need to be explored. Four different pelleted diets of increasing abrasiveness (lucerne, grass, grass and rice husks, and grass, rice husks and sand) were fed to four groups of a total of 28 adult goats in a controlled feeding experiment over a 6-month period. Tooth morphology was captured by medical CT scans at the beginning and end of the experiment. These scans, as well as the crania obtained post modem, were scored using the mesowear method. Comparisons between diet groups showed few significant differences after 6 months, irrespective of whether CT scans or the real teeth were scored. Only when assessing the difference in signal between the beginning and the end of the experiment did relevant, significant diet-specific effects emerge. Diets containing lower phytolith content caused a more pronounced change in mesowear towards sharper cusps/higher reliefs, while the feed containing sand did not result in more extreme changes in mesowear when compared with the same feed without sand. Our experiment suggests that the formation of a stable and hence reliable mesowear signal requires more time to develop than 6 months.
机译:牙科MesoWear应用于基于牙齿 - 尖牙形状和咬合浮雕来确定哺乳动物草食虫的一般饮食。低,钝的尖瓣被认为是典型的典型格拉塞尔和高,锋利的浏览器。然而,内部或外部磨料如何影响MeSoWear,并且需要探索佩戴签名的时间框架,仍然需要探索。在6个月内,在受控喂养实验中喂食了磨损磨损的四个不同的磨蚀性(Lucerne,草,草,草和大米壳,草,稻壳和草),共有28个成人山羊。医疗CT扫描在实验开始和结束时被医用CT扫描捕获的牙齿形态。这些扫描以及调制解调器的Crania,使用MesoWear方法进行评分。饮食群之间的比较在6个月后显示出几乎没有显着差异,无论CT扫描还是对真实的牙齿都被评分。只有在评估实验开始和结束之间的信号差异时,才会出现相关的,显着的饮食特异性效果。含有较低的植物素含量的饮食导致MeSoWear更加明显的变化,旨在更清晰的尖头/更高的浮雕,而含有含水的饲料不会导致MeSoWear的更极端的变化,而在没有沙子的情况下相同的饲料。我们的实验表明,形成稳定的和可靠的MesoWear信号需要更多时间来发展超过6个月。

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