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Rearing Pandalus borealis larvae in the laboratory

机译：在实验室饲养北极虾幼虫

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Larvae of the northern shrimp Pandalus borealis (Kroyer) are pelagic. In the Estuary and Gulf of St. Lawrence, Canada, the early stages are found in the upper 25-m of the water column in spring and early summer and are expected to experience a range of water temperatures from as low as 0 degrees C to as high at 6 degrees C. Little is known of the impact of water temperature on metabolic requirements of northern shrimp larvae. In this study, routine respiration (VO2), maximum respiration (electron transport system activity, ETSA) and metabolic scope for growth (MS, ETSA-VO2) of northern shrimp larvae were measured as a function of temperature (3, 5 and 8 degrees C), developmental stage (I-V at 3 degrees C, I-VII at 5 degrees C and 8 degrees C) and growth rate in dry mass. After logarithmic transformation, all three metabolic variables were linearly related to dry mass. The increase in VO2 with body mass was faster at 5 degrees C than at 3 or 8 degrees C, whereas with ETSA this increase was slower. As a result, MS increased more slowly with dry mass at 5 degrees C than at 3 and 8 degrees C. However, MS did not limit growth in this study, since it explained only 39% of the variability in growth. All three metabolic variables as well as growth varied together as a function of temperature and ontogeny. Q(10) of all three metabolic variables ranged from 1.6 and 2.2 for stages I-V larvae, except for VO2 at stage I (3.9) and stage III (2.9).
机译：北部虾泛虾（Kroyer）的幼虫是中上层的。在加拿大的河口和圣劳伦斯湾，春季和夏季初发现在水柱上部25-m的早期阶段，预计水温范围从0摄氏度到温度高达6摄氏度。人们几乎不了解水温对北部对虾幼虫代谢需求的影响。在这项研究中，根据温度（3、5和8度）测量北部虾幼虫的常规呼吸（VO2），最大呼吸（电子传输系统活性，ETSA）和生长代谢范围（MS，ETSA-VO2）。 C），发育阶段（IV在3摄氏度，I-VII在5摄氏度和8摄氏度）和干物质的生长速率。对数转换后，所有三个代谢变量均与干物质线性相关。 VO2随体重的增加在5摄氏度时比3或8摄氏度快，而ETSA则更慢。结果，在5摄氏度的干燥质量下，MS的增长比在3摄氏度和8摄氏度下的增长更慢。但是，MS并没有限制生长，因为它只能解释39％的生长变异性。这三个代谢变量以及生长都随温度和个体发育而变化。 I-V期幼虫的所有三个代谢变量的Q（10）范围分别为1.6和2.2，I期（3.9）和III期（2.9）的VO2除外。

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