Asian house rats may facilitate their invasive success through suppressing brown rats in chronic interaction
Asian house rats may facilitate their invasive success through suppressing brown rats in chronic interaction
复制标题
亚洲家鼠可能通过在长期相互作用中抑制褐鼠来促进其入侵成功
DOI：
10.1186/s12983-017-0202-4
复制
发表时间：
2017-04-12
影响因子：
2.8
通讯作者：
Zhang, Yao-Hua
中科院分区：
文献类型：
--
作者：
Guo, Hong-Ling;Teng, Hua-Jing;Zhang, Yao-Hua
黄胸鼠（Rattus tanezumi）和褐家鼠（Rattus norvegicus）是我国南方地区的近缘种，部分同域分布。tanezumi在中国已显著向北扩展，并部分取代了本地的棕色大鼠亚种，R。n.我是阿喀琉斯虽然入侵物种往往比本地物种更具侵略性，我们没有观察到种间的物理侵略R。塔内祖米安河n.我是阿喀琉斯在这里，我们关注的是R。tanezumi上级R. n.在非物理的竞争，这主要是由化学signals.ResultsWe介导的条件下，我们进行了两个实验室实验，以测试不同的范式在domesticatedR。塔内祖米安河n.我是阿喀琉斯在实验1中，我们笼中的每个物种的成年雄性大鼠2个月的异种或同种对，分区穿孔镀锌铁皮，允许交换化学刺激和超声波发声。男性尿液气味的性吸引力在R中呈增加趋势（边缘显著性）。与R. n.与同种对相比，海马糖皮质激素受体（GR）和脑源性营养因子（BDNF）mRNA表达上调。n.羞辱河tanezumi，分别当大鼠在异种对笼。在实验2中，我们保持年轻的雄性大鼠在单独的笼子里的房间，无论是相同的或不同的物种2个月，允许化学相互作用。男性尿液的性吸引力在R组显著增强。tanezumi，但降低了inR。n.异源特异性信号刺激下，海马G1和BDNF的mRNA表达上调。n.阿瓜图桑河tanezumi，分别。虽然不完全相同，实验1和2的结果是一般consistent.ConclusionsThe两个实验的结果表明，非物理/慢性种间刺激，特别是气味信号，之间的R。n.阿瓜图桑河tanezumi可能对R. n.对R.种纯我们推断，慢性种间相互作用可能有助于入侵的R。tanezumi进入R. n.在自然栖息地的寄生虫。
BackgroundThe Asian house rat (Rattus tanezumi) and the brown rat (Rattus norvegicus) are closely related species and are partially sympatric in southern China.Over the past 20 years,R. tanezumihas significantly expanded northward in China and partially replaced the native brown rat subspecies,R. n. humiliatus. Although invasive species are often more aggressive than native species, we did not observe interspecific physical aggression betweenR. tanezumiandR. n. humiliatus. Here, we focused on whether or notR. tanezumiwas superior toR. n. humiliatusin terms of nonphysical competition, which is primarily mediated by chemical signals.ResultsWe performed two laboratory experiments to test different paradigms in domesticatedR. tanezumiandR. n. humiliatus. In Experiment 1, we caged adult male rats of each species for 2 months in heterospecific or conspecific pairs, partitioned by perforated galvanized iron sheets, allowing exchange of chemical stimuli and ultrasonic vocalization. The sexual attractiveness of male urine odor showed a tendency (marginal significance) to increase inR. tanezumicaged withR. n. humiliatus, compared with those in conspecific pairs. Hippocampal glucocorticoid receptor (GR) and brain-derived nutrition factor (BDNF) mRNA were upregulated inR. n. humiliatusandR. tanezumi, respectively, when the rats were caged in heterospecific pairs. In Experiment 2, we kept juvenile male rats in individual cages in rooms with either the same or the different species for 2 months, allowing chemical interaction. The sexual attractiveness of male urine was significantly enhanced inR. tanezumi, but reduced inR. n. humiliatusby heterospecific cues and mRNA expression of hippocampalGRandBDNFwere upregulated by heterospecific cues inR. n. humiliatusandR. tanezumi, respectively. Although not identical, the results from Experiments 1 and 2 were generally consistent.ConclusionsThe results of both experiments indicate that nonphysical/chronic interspecific stimuli, particularly scent signals, betweenR. n. humiliatusandR. tanezumimay negatively affectR. n. humiliatusand positively affectR. tanezumi. We infer that chronic interspecific interactions may have contributed to the invasion ofR. tanezumiinto the range ofR. n. humiliatusin natural habitats.