Snubnose pompano (Trachinotus blochii, Lacépède) is a commercially important fish species that shows robust growth in captive environment. Tank colour is an important factor affecting the growth of fish larvae in aquaculture. Although the effect of tank colour has been studied in several fish species, it has not been studied in the snubnose pompano. We aimed to investigate how tank colour affects overall growth, survival, body composition, stress levels and digestive enzyme activities of snubnose pompano larvae at early larval stage and late larval stage. We noted that early–larval–stage larvae showed higher growth, crude protein contents and lower digestive enzyme activities when reared in blue and white tanks. Larvae showed low-stress levels when reared in grey and blue tanks. The same larvae showed low-survival and high-stress levels when reared in red tanks. The late–larval–stage larvae showed high growth and lipids, and low-digestive enzymes activities in white and yellow tanks. The larvae showed high-stress levels and low-ash contents when reared in red tanks. These differences are most likely due to the differences in light intensity inside tanks, which affects the ability of larvae to find and catch prey. Overall, our study sheds new light on cultivation conditions for snubnose pompano larvae. We recommend blue tanks for growing early–larval–stage larvae and white or yellow tanks for late-larval-stage larvae.

中文翻译：

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水箱颜色对鲭鱼幼虫生长、存活、应激水平、消化酶活性和身体成分的影响

Snubnose pompano ( Trachinotus blochii, Lacépède) 是一种具有重要商业价值的鱼类，在圈养环境中生长旺盛。鱼缸颜色是水产养殖中影响鱼苗生长的重要因素。虽然已经在几种鱼类中研究了水箱颜色的影响，但尚未在金丝雀中进行研究。我们的目的是调查水箱颜色如何影响鲭鱼幼虫早期和晚期幼虫的整体生长、存活、身体成分、应激水平和消化酶活性。我们注意到早期幼虫阶段的幼虫在蓝色和白色水箱中饲养时表现出更高的生长、粗蛋白含量和更低的消化酶活性。幼虫在灰色和蓝色水箱中饲养时表现出低压力水平。同样的幼虫在红缸中饲养时表现出低存活率和高压力水平。后期幼虫阶段的幼虫在白色和黄色水箱中显示出高生长和脂质以及低消化酶活性。在红缸中饲养时，幼虫表现出高应激水平和低灰分含量。这些差异很可能是由于水箱内光照强度的差异，影响了幼虫发现和捕捉猎物的能力。总体而言，我们的研究揭示了 snunnose pompano 幼虫的培养条件。我们推荐蓝色水箱用于早期幼虫阶段的幼虫生长，白色或黄色水箱用于后期幼虫阶段的幼虫生长。这会影响幼虫寻找和捕捉猎物的能力。总体而言，我们的研究揭示了 snunnose pompano 幼虫的培养条件。我们推荐蓝色水箱用于早期幼虫阶段的幼虫生长，白色或黄色水箱用于后期幼虫阶段的幼虫生长。这会影响幼虫寻找和捕捉猎物的能力。总体而言，我们的研究揭示了 snunnose pompano 幼虫的培养条件。我们推荐蓝色水槽用于培育早期幼虫阶段的幼虫，白色或黄色水槽用于培育晚期幼虫阶段的幼虫。