PDF(Pubmed)
Abstract：
A species introduced outside of its native range will likely encounter unusual abiotic and biotic conditions,and may exhibit phenotypic traits that may facilitate survival and persistance. Phenotypic plasticity drives non-native species\' development of adaptive traits in the new environment, increases their fitness, and as a result, contributes to invasion success. In this study, we examined inter and intraspecific phenotypic variation (body size and shape) for an invasive (Carassius gibelio) and introduced (Cyprinus carpio) cyprinid fish species (Teleostei: Cyprinidae) in the Düden Stream, Turkey, which is a small-scale river system. We hypothesized that interspecific phenotypic variation correlates with fish-specific variables and river site. We further hypothesized that these two species may exhibit similar phenotypic variation patterns between populations. The MANCOVA revealed that species-specific traits, river site, had significant effects on body shape variation and size along the stream. The differences in the shape of the head, the central portion of the body, and fins in both species most probably reflected differences in the swimming and feeding of the fish, possibly to avoid interspecies competition. The intraspecific phenotypic variation observed in both species may indicate rapid local adaptation, triggered by multiple founding event, or/and phenotypic plasticity.
摘要：
引入其本地范围之外的物种可能会遇到不寻常的非生物和生物条件，并可能表现出可能促进生存和抗性的表型性状。表型可塑性驱动非本地物种在新环境中发展适应性性状，增加他们的健身，结果，有助于入侵的成功。在这项研究中,我们检查了Düden溪流中侵入性（Carassiusgibelio）和引入的（Cyprinuscarpio）鲤鱼物种（Teleostei：Cyprinidae）的种内和种内表型变异（体型和形状），土耳其,这是一个小规模的河流系统。我们假设种间表型变异与鱼类特异性变量和河流位置相关。我们进一步假设这两个物种在种群之间可能表现出相似的表型变异模式。MANCOVA揭示了物种特异性特征，河流遗址,对沿河流的身体形状变化和大小有显著影响。头部形状的差异，身体的中央部分，和鳍在这两个物种中最可能反映了鱼的游泳和摄食的差异，可能是为了避免种间竞争。在两个物种中观察到的种内表型变异可能表明快速的局部适应，由多个成立事件触发，或/和表型可塑性。
