Plichta Zuzanna, Kobak Jarosław, Maciaszek Rafał, Kakareko Tomasz
Department of Ecology and Biogeography, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Lwowska 1, 87-100 Toruń, Poland.
Department of Invertebrate Zoology and Parasitology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Lwowska 1, 87-100 Toruń, Poland.
Animals (Basel). 2021 Apr 9;11(4):1071. doi: 10.3390/ani11041071.
An ornamental freshwater shrimp, , is popular as an aquarium hobby and, therefore, a potentially invasive species. There is a growing need for proper management of this species to determine not only their optimum breeding conditions, but also their ability to colonise novel environments. We tested habitat preferences of colour morphs (brown, red, white) of for substratum colour (black, white, grey shades, red) and fine or coarse chess-board patterns to recognise their suitable captivity conditions and predict their distribution after potential release into nature. We conducted laboratory choice experiments ( = 8) with three individuals of the same morph exposed for two hours to a range of backgrounds. Shrimp preferred dark backgrounds over light ones irrespective of their own colouration and its match with the background colour. Moreover, the brown and red morphs, in contrast to the white morph, preferred the coarse background pattern over the finer pattern. This suggests that the presence of dark, uniform substrata (e.g., rocks, macrophytes) will favour . Nevertheless, the polymorphism of the species has little effect on its total niche breadth, and thus its invasive potential.
一种观赏性淡水虾，作为水族爱好很受欢迎，因此是一种潜在的入侵物种。对该物种进行适当管理的需求日益增长，这不仅要确定其最佳繁殖条件，还要确定其在新环境中定殖的能力。我们测试了该虾的颜色形态（棕色、红色、白色）对基质颜色（黑色、白色、灰色阴影、红色）以及精细或粗糙棋盘图案的栖息地偏好，以识别其合适的圈养条件，并预测其在可能被释放到自然环境后的分布情况。我们进行了实验室选择实验（n = 8），让同一形态的三只个体在一系列背景下暴露两小时。无论自身颜色及其与背景颜色的匹配情况如何，虾都更喜欢深色背景而非浅色背景。此外，与白色形态相比，棕色和红色形态更喜欢粗糙的背景图案而非精细的图案。这表明深色、均匀的基质（如岩石、大型植物）的存在将有利于该虾。然而，该物种的多态性对其总生态位宽度影响不大，因此对其入侵潜力影响也不大。
