Effect of LED light spectra on the behavior, growth and gonadal sexual differentiation in the Japanese pufferfish, Takifugu rubripes

研究了蓝色（峰值在465 nm）和红色（峰值在625nm）两种不同波长对幼年日本河豚（Takifugu rubripes）行为、体细胞生长和性腺分化的影响。光源采用单波长LED。在红灯条件下，鱼苗（孵化一周后）表现出奇怪的行为，它们移动到水箱边缘，聚集和采摘墙壁，攻击性很强。相比之下，在蓝光照射下，它们保持恒定的距离，并与水箱壁分开游泳。每种波长培育的河豚的性腺性别与遗传性别相同。红光养殖的河豚，在一周内与自然光或蓝光相比，照射后的总长度不均匀性得到证实，此后这种趋势继续存在。这些结果表明，颜色波长是决定河豚幼鱼在自然环境下的攻击、逃跑、救援等行为的因素之一。

We examined the effect of two different wavelengths-blue (peak at 465 nm) and -red (peak at 625nm) on the behavior, somatic growth and sexual gonadal differentiation of the young Japanese pufferfish,Takifugu rubripes. The light sources were used as LED with one wave length. Under the red light condition, the fry (one week after hatch) showed the strange behaviors that they moved to the edge of the water tank, gathered and picked at the wallwith the high aggressiveness. In contrast, under the blue light, they kept constant distance and swam apart from the water tank wall. Pufferfish bred by each wavelength has the gonadal sex identical to the genetic sex. As for the puffer bred by a red light, unevenness was confirmed to the total length after irradiation in comparison with natural light or blue light within one week, and the tendency continued afterwards. These results indicate that the color wavelength is one of the factors to decide the actions (aggression, escape, relief etc.) of the pufferfish larvae under the natural environment.