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首页> 外文期刊>Marine ecology progress series >Trophic links between blue whiting (Micromesistius poutassou) larvae and the winter planktonic community in the NW Mediterranean Sea
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Trophic links between blue whiting (Micromesistius poutassou) larvae and the winter planktonic community in the NW Mediterranean Sea

机译：蓝色Whiting（MicroMesistius Poursassou）幼虫和NW地中海冬季浮游社区之间的营养链接

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摘要

We assessed the trophic ecology of blue whiting larvae in the NW Mediterranean by means of stomach content analyses in relation to their planktonic trophic environment. The trophic position of blue whiting larvae and that of the main taxa of the planktonic community was estimated by means of stable isotope analyses. Larvae and zooplankton were sampled in 2 oceanographic cruises conducted in the winters of 2017 and 2018. Blue whiting larvae showed a marked diel feeding pattern and high feeding incidence (similar to 90%). Throughout ontogeny, dietary changes were observed in the taxonomic composition, size and number of ingested prey. The smallest larvae fed on small prey, Tintinnina and nauplii, shifting to larger more energetic prey, Calanoida copepods, as development progressed. From the flexion stage onwards, larvae showed a positive selection for Calanoida, and no major switch in prey size or type was observed due to the scarcity of larger prey in the field. This limitation forced the larger larvae to increase the number of ingested prey (reaching 300 prey larva(-1)) to meet their energetic demands. In line with the observed shifts in diet, larvae showed an increase in delta C-13 and delta N-15 values throughout development. The trophic position estimates of the planktonic taxa shed light on the trophic structure of the planktonic community, identifying blue whiting larvae as a primary carnivore. Overall, the results suggest that blue whiting larvae feed efficiently in the Mediterranean trophic environment.
机译：我们通过胃内容分析与其浮游营养环境有关的胃含量分析评估了NW地中海的蓝色Whiting幼虫的营养生态学。通过稳定的同位素分析估计了蓝色Whiting幼虫的营养位置以及浮游群落的主要分类群。在2017年和2018年冬季进行的2个海洋游轮中取样幼虫和佐芙兰。蓝色Whiting幼虫显示出明显的二氧化二蛋白喂养模式和高喂养发病率（类似于90％）。在整个组织中，在分类物组合物，摄入猎物的大小和数量中观察到膳食变化。喂养小猎物，丁尼尼娜和Nauplii的最小幼虫，转移到更大的能量猎物，Calanoida Copepods，因为发展进展。从屈曲阶段开始，幼虫表现出Calanoida的阳性选择，并且由于场上较大猎物的稀缺性，没有观察到猎物尺寸或类型的主要开关。这种限制迫使较大的幼虫增加摄入猎物的数量（到达＆ 300猎物幼虫（-1））以满足他们的能量需求。符合观察到的饮食变化，幼虫在整个发育中显示了Delta C-13和Delta N-15值的增加。浮游动物血管缺光对浮游群落营养结构的营养位置估计，鉴定蓝色Whiting幼虫作为主要食肉动物。总体而言，结果表明，蓝色Whiting幼虫有效地在地中海营养环境中饲养。

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