Dietary routing of nutrients from prey to offspring in a generalist predator: effects of prey quality
Dietary routing of nutrients from prey to offspring in a generalist predator: effects of prey quality
复制标题
DOI：
10.1111/j.1365-2435.2006.01077.x
复制
发表时间：
2006-02-01
影响因子：
5.2
通讯作者：
Scheu, S
中科院分区：
文献类型：
--
作者：
Rickers, S;Langel, R;Scheu, S
1.研究了狼蛛科（Lycosidae）狼蛛（Pardosa lugubris）雌蛛取食不同质量猎物后的繁殖情况。蜘蛛被喂食黑腹果蝇（双翅目，高品质），Heteromurus nitidus（弹尾目，高品质）或Folsomia candida（弹尾目，有毒）的单一饮食，或D。melanogaster和H. nitidus和D. melanogaster和F.念珠菌2.研究了产卵过程中从猎物到雌性和从雌性到后代的营养流，追踪了碳和氮稳定同位素，猎物富含C-13和/或N-15.3。混合不同的高质量猎物对雌性生物量和性能没有好处，与早期的结果相比，与幼年蜘蛛。白腹蛛对黑腹蛛有毒性：雌性黑腹蛛即使喂食含有高质量猎物的混合食物，也不能繁殖并最终死亡;蜘蛛对白腹蛛没有产生厌恶。念珠菌5.追踪稳定同位素记录了C和N从猎物进入雌性和它们的后代;饮食营养几乎完全进入产卵。稳定同位素分析有力地支持假设。假丝酵母通过抑制来自其他猎物的营养物的结合而在蜘蛛中引起摄食后的生理效应。
1. Reproduction of female wolf spiders (Pardosa lugubris; Lycosidae) fed with prey of different quality was investigated. Spiders were fed either a single diet of Drosophila melanogaster (Diptera, high quality), Heteromurus nitidus (Collembola, high quality) or Folsomia candida (Collembola, toxic), or a mixed diet of D. melanogaster and H. nitidus, and of D. melanogaster and F. candida.2. Nutrient flow from prey into females and from females into offspring during egg production was investigated tracing carbon and nitrogen stable isotopes with prey being enriched in C-13 and/or N-15.3. There was no benefit of mixing different high-quality prey on female biomass and performance, contrasting with earlier results obtained with juvenile spiders.4. Folsomia candida was toxic for P. lugubris: females, even if fed a mixed diet also containing high-quality prey, did not reproduce and finally died; spiders did not acquire aversion against F. candida.5. Tracing stable isotopes documented the incorporation of C and N from prey into females and their offspring; dietary nutrients were routed almost exclusively into egg production.6. Stable isotope analysis strongly supported the assumption that F. candida causes post-ingestive physiological effects in spiders by inhibiting the incorporation of nutrients from other prey.