State Key Laboratory of Biocatalysis and Enzyme Engineering, Centre for Behavioural Ecology and Evolution (CBEE), School of Life Sciences, Hubei University, Wuhan, 430062, Hubei, China.
State Key Laboratory of Biocatalysis and Enzyme Engineering, Centre for Behavioural Ecology and Evolution (CBEE), School of Life Sciences, Hubei University, Wuhan, 430062, Hubei, China
Biol Open. 2020 Nov 6;9(11):bio056846. doi: 10.1242/bio.056846.
Prey vary dramatically in quality, and maternal diet is generally assumed to substantially influence offspring survivorship, growth, and reproduction in spiders. Numerous studies that have tested this hypothesis have focused exclusively on parental generation or have considered relatively few fitness components of juvenile offspring. However, maternal diet may have a substantial effect on fitness performance beyond juvenile offspring. Here, we investigated the influence of one-time maternal feeding on multiple offspring fitness components, including the survival rate and growth of juvenile offspring as well as the mating and reproductive success of adult offspring in , a sheetweb spider with an extremely short lifespan (∼1 month). We fed field-collected adult female spiders two different diets only once immediately before oviposition: midges ( sp.) only (MO) or flies () only (FO). Juvenile offspring of MO females had significantly higher survival rate, faster growth, and larger male size at maturity than FO offspring. Although maternal diet did not significantly influence mating behavior or fecundity of female offspring overall, those of MO females laid eggs earlier and their eggs also hatched earlier and had a higher hatching rate than those of FO females. Intriguingly, one-time maternal feeding was sufficient to have such an influence on offspring fitness even beyond juvenile offspring in This one-time maternal effect may be widespread in other spiders and other invertebrates with a short lifespan.This article has an associated First Person interview with the first author of the paper.
猎物的质量差异很大，人们普遍认为母体的饮食会极大地影响蜘蛛后代的存活率、生长和繁殖。许多测试这一假设的研究都只关注亲代，或者只考虑了幼年后代相对较少的适应度成分。然而，母体饮食可能对除幼年后代之外的适应度表现有重大影响。在这里，我们研究了一次母体喂养对多个后代适应度成分的影响，包括幼年后代的存活率和生长率，以及成年后代的交配和生殖成功，研究对象是一种寿命极短（约 1 个月）的片网蛛。我们仅在产卵前一次喂食野外采集的成年雌性蜘蛛两种不同的食物：只有摇蚊（ sp.）（MO）或只有家蝇（）（FO）。MO 雌蛛的幼蛛存活率更高、生长速度更快、成熟时雄性体型更大。尽管母体饮食总体上并没有显著影响雌性后代的交配行为或繁殖力，但 MO 雌蛛的产卵时间更早，其卵也更早孵化，孵化率更高。有趣的是，即使在 中，一次母体喂养也足以对后代的适应度产生这种影响，甚至超越幼年后代。这种一次性的母体效应可能在其他寿命较短的蜘蛛和其他无脊椎动物中很普遍。本文有一篇与该论文第一作者的相关第一人称采访。
