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

我们研究了两种不同波长——蓝色（峰值在 465 nm）和红色（峰值在 625 nm）对日本河豚幼鱼 Takifugu rubripes 的行为、体细胞生长和性腺分化的影响。光源采用一种波长的LED。红光条件下，鱼苗（孵化后1周）表现出向水箱边缘移动、向池壁聚集、啄食等奇怪行为，具有很强的攻击性。相比之下，在蓝光下，它们保持着恒定的距离，远离水箱壁游动。每个波长培育的河豚的性腺性别与遗传性别相同。对于用红光培育的河豚来说，与自然光或蓝光相比，照射后的总长度在一周内被确认为不均匀，并且此后该趋势继续存在。这些结果表明，颜色波长是决定河豚幼虫在自然环境下行为（攻击、逃跑、缓解等）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.