Feeding specialization and longer generation time are associated with relatively larger brains in bees
Feeding specialization and longer generation time are associated with relatively larger brains in bees
复制标题
蜜蜂的摄食专业化和较长的世代时间与相对较大的大脑有关
DOI：
10.1098/rspb.2020.0762
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Bartomeus, Ignasi
中科院分区：
文献类型：
--
作者：
Sayol, Ferran;Collado, Miguel Á.;Garcia-Porta, Joan;Seid, Marc A.;Gibbs, Jason;Agorreta, Ainhoa;San Mauro, Diego;Raemakers, Ivo;Sol, Daniel;Bartomeus, Ignasi
尽管昆虫的大脑很小，但它们的大脑大小却有很大的差异。虽然这种变异的功能意义越来越被认识到，但关于昆虫大脑大小的差异是否主要是限制或选择压力的结果的研究几乎没有进行。在这里，我们通过结合对蜜蜂(蜂总科)这一主要昆虫群体的大脑大小的前瞻性和回溯性系统发育分析来解决这一差距。使用来自北美和欧洲的93个物种的大脑数据集，我们发现身体大小是蜜蜂大脑大小的唯一最佳预测因子。然而，分析也表明，即使根据身体大小进行调整，大脑大小仍然存在很大差异。因此，我们问，大脑相对大小的这种变化是否可以用适应性假设来解释。我们发现，与多面手或多代物种相比，单代生态专门化物种的大脑--相对于它们的身体大小--更大，但我们没有发现社会性对相对大脑大小的影响。系统发育重建进一步支持了在不同的摄食、专门化和生殖策略的谱系中，相对脑大小存在不同的适应性最优。我们的发现为昆虫大脑的进化提供了新的线索，强调了生态压力对社会因素的重要性，并表明这些压力不同于之前在其他类群中发现的影响大脑进化的压力。
Despite their miniature brains, insects exhibit substantial variation in brain size. Although the functional significance of this variation is increasingly recognized, research on whether differences in insect brain sizes are mainly the result of constraints or selective pressures has hardly been performed. Here, we address this gap by combining prospective and retrospective phylogenetic-based analyses of brain size for a major insect group, bees (superfamily Apoidea). Using a brain dataset of 93 species from North America and Europe, we found that body size was the single best predictor of brain size in bees. However, the analyses also revealed that substantial variation in brain size remained even when adjusting for body size. We consequently asked whether such variation in relative brain size might be explained by adaptive hypotheses. We found that ecologically specialized species with single generations have larger brains—relative to their body size—than generalist or multi-generation species, but we did not find an effect of sociality on relative brain size. Phylogenetic reconstruction further supported the existence of different adaptive optima for relative brain size in lineages differing in feeding specialization and reproductive strategy. Our findings shed new light on the evolution of the insect brain, highlighting the importance of ecological pressures over social factors and suggesting that these pressures are different from those previously found to influence brain evolution in other taxa.
登录
查看更多内容
影响因子：
16.6
作者：
Sayol F;Downing PA;Iwaniuk AN;Maspons J;Sol D
通讯作者：
Sol D
行为创新：生态学和进化文献中被忽视的问题？
影响因子：
4.8
作者：
D. Sol
通讯作者：
D. Sol
影响因子：
4.1
作者：
Danforth, BN;Sauquet, H;Packer, L
通讯作者：
Packer, L
DOI：
10.1152/physiol.00026.2010
发表时间：
2010-12
期刊：
Physiology (Bethesda, Md.)
影响因子：
--
作者：
Busto GU;Cervantes-Sandoval I;Davis RL
通讯作者：
Davis RL
影响因子：
10.7
作者：
Katoh K;Standley DM
通讯作者：
Standley DM