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

研究了两种不同波长的蓝光（465 nm）和红光（625 nm）对红鳍东方鲀（Takifugu rubripes）幼鱼行为、体细胞生长和性腺分化的影响。光源采用单波长LED。在红光条件下，孵化一周的鱼苗表现出向水池边缘移动、聚集、挑壁等异常行为，攻击性强。相反，在蓝光下，它们保持着恒定的距离，远离水箱壁。每种波长繁殖的河豚都具有与遗传性别相同的性腺性别。对于通过红光培育的河豚，与自然光或蓝光相比，在一周内确认了照射后全长的不均匀性，并且该趋势随后继续。这些结果表明，颜色波长是决定行为（攻击，逃避，救济等）的因素之一。在自然环境下的河豚鱼幼体。

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.