Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-901, Brazil; Reef Fish Ecology and Conservation Lab, Departamento de Biologia Marinha, Universidade Federal Fluminense, Niterói, RJ, 24020141, Brazil.
Instituto do Mar, Universidade Federal de São Paulo, Santos, SP, 11070-100, Brazil.
Mar Environ Res. 2021 Apr;166:105261. doi: 10.1016/j.marenvres.2021.105261. Epub 2021 Jan 12.
Most methods for assessing reef fish assemblages at night require artificial light, but the use of different colors of light may influence the results. We used data from 135 underwater visual censuses (UVCs) performed with different colors of light (red, blue and white) to evaluate the structure of fish assemblages on subtropical rocky reefs along three depth intervals. We did not detect any effect of the color of light on total density or fish species richness per transect, nor on the structure of the entire assemblage. However, the density of some of the most abundant species varied according to the color used. Red light showed the highest values of frequency of occurrence for most species, while the white light resulted in decreased abundance of some fish species. Our results emphasize the importance of choosing the color of light depending on the type of studies to be conducted. This will depend on the objectives of the research (e.g. inventory, behavior or community dynamics) and the target fish fauna (e.g. mobile or sedentary).
大多数夜间评估珊瑚礁鱼类群落的方法都需要人工光，但不同颜色的光的使用可能会影响结果。我们使用了来自 135 次不同颜色（红色、蓝色和白色）水下视觉普查（UVC）的数据，评估了亚热带多岩石珊瑚礁在三个深度间隔内的鱼类群落结构。我们没有检测到光的颜色对每条样线的总密度或鱼类物种丰富度，或整个群落结构有任何影响。然而，一些最丰富物种的密度根据所用的颜色而有所不同。红光对大多数物种的出现频率显示出最高的值，而白光则导致一些鱼类物种的丰度减少。我们的研究结果强调了根据要进行的研究类型选择光的颜色的重要性。这将取决于研究的目的（例如，清查、行为或群落动态）和目标鱼类区系（例如，移动或静止）。
