Isotopic niche variation in Tasmanian devils Sarcophilus harrisii with progression of devil facial tumor disease.
Isotopic niche variation in Tasmanian devils Sarcophilus harrisii with progression of devil facial tumor disease.
复制标题
DOI：
10.1002/ece3.7636
复制
发表时间：
2021-06
影响因子：
2.6
通讯作者：
McDonald RA
中科院分区：
文献类型：
--
作者：
Bell O;Jones ME;Cunningham CX;Ruiz-Aravena M;Hamilton DG;Comte S;Hamede RK;Bearhop S;McDonald RA
魔鬼面部肿瘤病（DFTD）是一种影响袋獾的传染性癌症。该病已造成严重的人口减少，并与人口和行为变化有关，包括繁殖早期、年龄结构年轻化以及传播和社会互动减少。魔鬼通常是孤独的，但在以大型尸体为食时，社会交往是司空见惯的。DFTD肿瘤会使颌骨和口腔毁容，因此患病个体可能会改变他们的饮食，以摄入替代食物，避免同种相互作用，或减少竞争。利用晶须的稳定同位素分析（δ13C和δ15N），我们测试了DFTD进展（以肿瘤体积衡量）是否影响了来自塔斯马尼亚州六个地点的94个感染袋獾的同位素比率和同位素生态位，这些地点包括四个桉树种植园，一个小农区和一个国家公园。然后，使用检测肿瘤前后取样的10只魔鬼和未检测肿瘤的8只魔鬼的组织，我们检查了同一个体的δ13C和δ15N的平均值和标准差在健康和患病状态之间是否变化。δ13C和δ15N值一般与肿瘤体积无关，但在Freycinet国家公园，δ15N值随着肿瘤体积的增加而显著增加。感染DFTD与检测肿瘤前后取样的单个魔鬼δ13C和δ15N值的平均值或标准差无显著变化。我们的分析表明，袋獾在面对DFTD感染和进展时倾向于维持其同位素生态位，除非生态条件有助于饮食和摄食行为的转变，这表明生态环境以及疾病严重程度可以调节袋獾对DFTD的行为反应。袋獾在面对面部肿瘤疾病的感染和进展时，通常保持其同位素生态位。唯一的例外是生态条件促进了饮食和喂养行为的转变，比如在Freycinet国家公园。生态环境和疾病严重程度可以调节袋獾对DFTD的行为反应。
Devil facial tumor disease (DFTD) is a transmissible cancer affecting Tasmanian devils Sarcophilus harrisii. The disease has caused severe population declines and is associated with demographic and behavioral changes, including earlier breeding, younger age structures, and reduced dispersal and social interactions. Devils are generally solitary, but social encounters are commonplace when feeding upon large carcasses. DFTD tumors can disfigure the jaw and mouth and so diseased individuals might alter their diets to enable ingestion of alternative foods, to avoid conspecific interactions, or to reduce competition. Using stable isotope analysis (δ13C and δ15N) of whiskers, we tested whether DFTD progression, measured as tumor volume, affected the isotope ratios and isotopic niches of 94 infected Tasmanian devils from six sites in Tasmania, comprising four eucalypt plantations, an area of smallholdings and a national park. Then, using tissue from 10 devils sampled before and after detection of tumors and 8 devils where no tumors were detected, we examined whether mean and standard deviation of δ13C and δ15N of the same individuals changed between healthy and diseased states. δ13C and δ15N values were generally not related to tumor volume in infected devils, though at one site, Freycinet National Park, δ15N values increased significantly as tumor volume increased. Infection with DFTD was not associated with significant changes in the mean or standard deviation of δ13C and δ15N values in individual devils sampled before and after detection of tumors. Our analysis suggests that devils tend to maintain their isotopic niche in the face of DFTD infection and progression, except where ecological conditions facilitate a shift in diets and feeding behaviors, demonstrating that ecological context, alongside disease severity, can modulate the behavioral responses of Tasmanian devils to DFTD. Tasmanian devils generally maintain their isotopic niche in the face of infection and progression of devil facial tumor disease. The exception was where ecological conditions facilitated a shift in diets and feeding behaviors, such as at Freycinet National Park. Ecological context, alongside disease severity, can modulate the behavioral responses of Tasmanian devils to DFTD.
登录
查看更多内容
影响因子：
2.7
作者：
Araujo, Marcio S.;Bolnick, Daniel I.;dos Reis, Sergio F.
通讯作者：
dos Reis, Sergio F.
影响因子：
3.7
作者：
Andersen, Georgina E.;McGregor, Hugh W.;Jones, Menna E.
通讯作者：
Jones, Menna E.
影响因子：
2.3
作者：
Fairbanks, Bonnie M.;Hawley, Dana M.;Alexander, Kathleen A.
通讯作者：
Alexander, Kathleen A.
影响因子：
5.9
作者：
Cunningham, Calum X.;Scoleri, Vince;Jones, Menna E.
通讯作者：
Jones, Menna E.
影响因子：
64.8
作者：
Behringer, Donald C.;Butler, Mark J.;Shields, Jeffrey D.
通讯作者：
Shields, Jeffrey D.