Code and data from: Experiential legacies of early-life dietary polyunsaturated fatty acid (PUFA) content on juvenile Walleye: Potential impacts from climate change

Climate-induced shifts in plankton blooms may alter fish recruitment by
affecting the fatty acid composition of early-life diets and corresponding
performance. Early-life nutrition may immediately affect survival but may
also have a lingering influence on size and growth via experiential
legacies. We explored the short- and longer-term performance consequences
of different concentrations of polyunsaturated fatty acids (PUFA) for
juvenile Walleye (Sander vitreus, Mitchill 1818). For the first 10 d of
feeding, juveniles were provided Artemia enriched with: oleic acid (low
PUFA), high docosahexaenoic acid and high eicosapentaenoic acid (high
PUFA), or high PUFA and a form of vitamin E (high PUFA + E). After 10 d,
all fish were fed a high-quality diet and reared for an additional 27 d.
Juveniles fed either high PUFA diet were 1.15-fold larger (PUFA mean ± SD
= 20.0 ± 3.3 mg; PUFA + E = 19.8 ± 3.3 mg) than those fed the low PUFA
(17.3 ± 2.8 mg) diet after 10 d of feeding. After 27 days, juveniles
initially fed the high PUFA diet were still 1.10-1.20-fold larger (PUFA =
407.0 ± 61.6 mg; PUFA + E = 422.7 ± 58.7 mg) than those initially fed the
low PUFA diet (356.5.0 ± 39.5 mg). Our findings demonstrate that fatty
acid composition of juvenile Walleye diets has immediate and lingering
size effects. As changes in climate continue to alter lower trophic
levels, fish management and conservation may need to consider short- and
long-term effects of temporal or spatial differences in early-life diet
quality.

气候驱动的浮游植物水华变化，可通过改变鱼类早期日粮的脂肪酸组成及其相关生长表现，影响鱼类补充量。

鱼类早期营养不仅会直接影响个体存活率，还可通过早期发育遗留效应，对其体型与生长产生持续影响。

本研究以白斑狗鱼幼鱼（Sander vitreus, Mitchill 1818）为研究对象，探究了不同浓度多不饱和脂肪酸（polyunsaturated fatty acids, PUFA）日粮对其短期与长期生长表现的影响。

实验初始的10天饲喂阶段，幼鱼分别投喂经三种方式强化的卤虫：添加油酸的低PUFA组、添加高浓度二十二碳六烯酸与二十碳五烯酸的高PUFA组，以及添加高PUFA与维生素E的高PUFA+E组。

第10天饲喂结束后，所有实验鱼均更换为高品质日粮，继续饲养27天。

饲喂10天后，投喂高PUFA日粮的幼鱼体型均大于低PUFA组（17.3 ± 2.8 mg），其中高PUFA组幼鱼体重均值±标准差为20.0 ± 3.3 mg，高PUFA+E组为19.8 ± 3.3 mg，分别为低PUFA组的1.15倍。

继续饲养27天后，早期投喂高PUFA日粮的幼鱼体型仍显著大于早期投喂低PUFA组的幼鱼（356.5 ± 39.5 mg），其中高PUFA组幼鱼体重为407.0 ± 61.6 mg，高PUFA+E组为422.7 ± 58.7 mg，分别为低PUFA组的1.10~1.20倍。

本研究结果表明，白斑狗鱼幼鱼日粮的脂肪酸组成对其体型具有即时且持续的影响。

随着气候变化持续改变低营养级群落结构，鱼类资源管理与保护工作需考虑早期日粮质量在时间与空间上的差异所带来的短期与长期影响。