Hybrid Striped Bass (HSB; White Bass Morone chrysops × Striped Bass M. saxatilis) represent a valuable sector of the U.S. aquaculture industry. Despite their commercial importance, one factor limiting the growth of the HSB industry is the lack of refined methods to rear larvae in tanks, including the lack of knowledge about optimal rearing conditions, feeding behavior, and efforts to reduce the time larvae spend utilizing live foods. Four‐day‐old HSB larvae were stocked into two recirculating aquaculture systems (72.0–73.9 larvae/L) maintained at 18°C and 26°C. Larvae were fed three times daily with either rotifers Brachionus plicatilis (60 rotifers · mL⁻¹ · tank⁻¹ · d⁻¹) or brine shrimp Artemia sp. (12 Artemia · mL⁻¹ · tank⁻¹ · d⁻¹) according to the designated replicated treatment for 2–12 d in 2‐d increments where larvae were progressively weaned from rotifers onto Artemia. The number of days fed rotifers (DFR) had no significant effect on survival of larvae reared at either 18°C (46.6%) or 26°C (30.2%). However, there was a significant difference in larval survival between the two temperatures. Larvae were measured at the conclusion of the study, and those reared at 18°C were shorter (8.00 mm TL) than those reared at 26°C (9.59 mm TL); TL and body depth of larvae varied significantly among treatments by temperature, DFR, and their interaction. These results demonstrate that minimizing the time spent feeding on rotifers maximized the growth of HSB larvae. Results also indicate that Artemia is a suitable diet for 6‐d‐old larval HSB and that the fish can easily be weaned from rotifers at both optimum (26°C) and suboptimum (18°C) culture temperatures while maintaining suitable growth. Notably, this was achieved with no significant drop in survival. Additional research is needed to optimize Artemia nauplius feeding regimes to minimize the time for which HSB must be given live feeds in order to wean to a dry diet more quickly while optimizing growth and survival.

中文翻译：

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尽量减少喂食轮虫的时间，从而在循环水产养殖系统中最大程度增加杂交条纹鲈鱼幼虫的生长

杂交条纹鲈鱼（HSB；白鲈Morone chrysops  ×条纹鲈M. saxatilis）是美国水产养殖业的重要领域。尽管具有重要的商业意义，但限制HSB行业发展的因素之一是缺乏完善的方法来饲养罐中的幼体，包括缺乏有关最佳饲养条件，喂养行为的知识，以及减少使用活体食物的幼体花费时间的努力。 。将四天龄的HSB幼虫放养到两个循环水产养殖系统中（72.0-73.9幼虫/升），保持在18°C和26°C。幼虫每天用轮虫Brachionus plicatilis（60轮虫·mL ^-1  ·槽^-1  ·d ^-1）或卤虾Artemia sp。（12  Artemia  ·mL ^-1  ·tank ^-1  ·d ^-1）按照指定的重复处理方式进行2-12 d，以2 d为增量，其中幼虫从轮虫逐渐断奶到Artemia。饲喂轮虫的天数（DFR）对在18°C（46.6％）或26°C（30.2％）饲养的幼虫的存活率没有显着影响。但是，两个温度之间的幼虫存活率存在显着差异。在研究结束时测量幼虫，在18°C饲养的幼虫（8.00毫米TL）比在26°C饲养的幼虫（9.59毫米TL）要短。根据温度，DFR及其相互作用，幼虫的TL和体深在不同处理之间有显着差异。这些结果表明，减少花在轮虫上的时间可使HSB幼虫的生长最大化。结果还表明，卤虫病是适合6龄幼体HSB的饮食，在最佳（26°C）和次最适度（18°C）养殖温度下，可以很容易地从轮虫上断奶该鱼，同时保持适当的生长。值得注意的是，这没有显着降低存活率。需要更多的研究来优化卤虫无节幼体投喂方法，以尽量减少其HSB必须更快速地给出活饲料，以断奶至干饲料，同时优化生长和存活的时间。