1. In order to evaluate the effects of ecological disturbances, such as climate change, human‐induced habitat modification, or species introduction, and in order to adopt appropriate management policies for their conservation, knowledge of the trophic ecology of protected or threatened species is crucial. The Italian crested newt, Triturus carnifex (Laurenti, 1768), is listed in annexes II and IV of the European Habitats Directive. For this species, changes in water quality and habitat loss represent major threats, potentially impairing its breeding and feeding activities.
2. Artificial aquatic habitats, such as cattle‐drinking pools, represent valuable refuges and suitable breeding sites for T. carnifex. The aim of this study was to determine the food niche of the Italian crested newt in these habitats, evaluating its prey selection strategy in relation to a range of environmental conditions and differing availability of resources. Stomach contents (indicative of short‐term diet) and δ¹³C and δ¹⁵N signatures of tails (indicative of medium‐term diet) of adult newts from three artificial ponds in central Italy, where traditional silvo‐pastoral activities are still important, were determined. Potential prey were also sampled and processed for stable isotope analysis.
3. Triturus carnifex, similar to other newt species, is an opportunistic predator, feeding on a wide variety of prey that includes terrestrial and aquatic macroinvertebrates. In particular, the opportunistic use of temporally available small zooplankton was identified from stomach contents analysis. Conversely, stable isotope analysis highlighted the consumption of larger, soft‐bodied prey that the stomach‐contents‐based approach underestimated. These included terrestrial oligochaetes, which turned out to be the most important and energy‐rich food source in the medium term.
4. These results emphasize the usefulness of combined approaches for studying the trophic ecology of salamanders and also highlight the importance of the integrated management of aquatic breeding habitats and neighbouring terrestrial habitats, as sources of food, for newt conservation.

中文翻译：

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基于胃成分和稳定同位素分析，在结构不同的人工池塘中的意大利new（Triturus carnifex）的日粮组成

1. 为了评估生态扰动的影响，例如气候变化，人为改变的栖息地或引入物种，以及为了采取适当的管理政策进行保护，了解受保护或受威胁物种的营养生态至关重要。意大利凤头new，Triturus carnifex（Laurenti，1768），被列入《欧洲人居指令》的附件二和附件四。对于这个物种，水质的变化和栖息地的丧失是主要的威胁，有可能损害其繁殖和摄食活动。
2. 人工水生生境，例如牛饮水池，代表了珍贵的避难所和适宜的驯养场所。这项研究的目的是确定这些栖息地中意大利凤头new的食物生态位，评估其在一系列环境条件和不同资源可用性下的猎物选择策略。胃内容物（指示短期饮食）和δ ¹³ C和δ ¹⁵个N个签名（指示中期的饮食）从三个人工池塘位于意大利中部，传统的林牧复合牧区活动仍然是重要的成年蝾螈，被确定。还对潜在的猎物进行了采样和处理，以进行稳定的同位素分析。
3. 象其他new类动物一样，Triturus carnifex是一种机会主义的捕食者，以包括陆地和水生大型无脊椎动物在内的各种各样的猎物为食。特别是，从胃内容物分析中确定了机会性利用暂时可用的小型浮游动物。相反，稳定的同位素分析突出显示了消耗较大的，基于胃内容的方法低估了猎物的情况。这些包括陆生寡足类动物，事实证明，它们是中期最重要且能量最丰富的食物来源。
4. 这些结果强调了结合的方法对研究the的营养生态学的有用性，也强调了水生繁殖生境和邻近陆地生境作为食物来源对new的综合管理的重要性。