Why do so many flour beetle copulations fail?
Why do so many flour beetle copulations fail?
复制标题
为什么这么多面粉甲虫交配失败？
DOI：
10.1111/j.1570-7458.2012.01292.x
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发表时间：
2013
影响因子：
1.9
通讯作者：
T. Tregenza
中科院分区：
文献类型：
--
作者：
Frances Tyler;T. Tregenza
无法受精的交配在很多物种中都很常见，但考虑到双方都付出的固有成本，这种情况仍然是个谜。失败的决定因素是多种多样的，并且可能在交配之前、期间或之后生效。在红谷甲、赤拟谷盗（鞘翅目：拟步甲科）中，据报道，交配失败的种群估计高达 55%，这表明这些失败的原因在交配系统中发挥着重要作用，或者说，在该系统中确定失败的人（可能是雌性）所经历的成本很低。在这里，我们表明失败是由围交配决定的；成功的精囊转移（通过交配个体质量的变化来表明）通常会导致后代的产生，这表明交配后雌性选择的机制不会导致彻底失败。未能受精的交配比例显然不受交配对的相关性、年龄、交配状态、雌性体重或交配间隔时间的影响。这表明，替代的适应性解释是导致该物种普遍存在无法导致受精的交配的原因，或者所涉及的成本足够小，因此针对此类失败的选择很弱。
Copulations that fail to result in fertilisations are common across a broad range of species, and remain enigmatic given the inherent costs that are being paid by both partners. The determinants of failures are varied and can take effect before, during, or after copulating. In the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), population estimates of copulations failing to result in fertilisations as high as 55% have been reported, suggesting that the causes of these failures play an important role in the mating system, or that the costs experienced by those determining failure, in this system likely the females, is low. Here, we show that failure is determined peri‐copulation; successful spermatophore transfer (indicated by change in mass of mating individuals) typically results in offspring production, suggesting that mechanisms of post‐copulatory female choice do not cause outright failure. The proportion of copulations that failed to result in fertilisations was apparently not influenced by the relatedness of mating pairs, the age, mating status, or mass of the female, or the interval she experienced between matings. This suggests that alternative adaptive explanations are responsible for the prevalence of copulations that fail to result in fertilisations in this species, or that the costs involved are sufficiently small, so that selection against such failures is weak.