IRTA-Sant Carles de la Ràpita, Ctra. Poble Nou Km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain.
IRTA-Sant Carles de la Ràpita, Ctra. Poble Nou Km 5.5, 43540, Sant Carles de la Ràpita, Tarragona, Spain.
Mar Environ Res. 2021 Jun;168:105304. doi: 10.1016/j.marenvres.2021.105304. Epub 2021 Mar 16.
The pen shell, Pinna nobilis L. is critically endangered by the spread of a haplosporidan parasite. Stable isotopes have been shown an association with dietary assimilation, trophic level, and body condition, and can provide valuable information for ex situ conservation and breeding. In this context, the aim of this study was to investigate the nutritional status of individuals using δC and δN patterns across pen shell body tissues as tracers of elemental incorporation from treatment diets based on commercial gels and living phytoplankton and/or sediment. Further comparisons were also conducted with field animals and diets to better understand nutritional needs. Captive individuals, were enriched in δC and δN (~18.9 and 1.3‰, respectively), suggesting severe nutritional stress and utilization of own N and C pools, especially muscle. The mixing model for field individuals evidenced a large contribution from the zooplankton fraction (34.9%), which was further confirmed by experimental feeding with Artemia nauplii.
珍珠贝，Pinna nobilis L. 由于一种单孢子虫寄生虫的传播而处于极度濒危状态。稳定同位素已被证明与饮食同化、营养水平和身体状况有关，可为异地保护和繁殖提供有价值的信息。在这种情况下，本研究的目的是利用δC 和 δN 模式研究个体的营养状况，作为从基于商业凝胶和活体浮游植物和/或沉积物的治疗饮食中元素吸收的示踪剂。还与野外动物和饮食进行了进一步比较，以更好地了解营养需求。养殖个体的 δC 和 δN （分别约为 18.9 和 1.3‰）富集，表明存在严重的营养压力和自身氮和碳库的利用，尤其是肌肉。野外个体的混合模型表明，有大量的浮游动物部分（34.9%），这一点通过用丰年虾无节幼体进行的实验性喂养得到了进一步证实。
