期刊
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
卷 290, 期 1995, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rspb.2023.0216
关键词
sperm competition; sperm production; sperm quality; sperm DNA fragmentation; eusocial hymenopterans
Sperm competition is positively correlated with sperm production and viability but unrelated to sperm DNA integrity in Cataglyphis desert ants, highlighting the important role of sperm competition in shaping reproductive performance in eusocial Hymenoptera.
Sperm competition is a pervasive evolutionary force that shapes sperm traits to maximize fertilization success. Indeed, it has been shown to increase sperm production in both vertebrates and invertebrates. However, sperm production is energetically costly, which may result in trade-offs among sperm traits. In eusocial hymenopterans, such as ants, mating dynamics impose unique selective pressures on ejaculate. Males are sperm limited: they enter adulthood with a fixed amount of sperm that will not be renewed. We explored whether sperm competition intensity was associated with sperm quantity and quality (i.e. sperm viability and DNA fragmentation) in nine Cataglyphis desert ants. Our results provide phylogenetically robust evidence that sperm competition is positively correlated with sperm production and sperm viability. However, it was unrelated to sperm DNA integrity, indicating the absence of a trade-off involving this trait. These findings underscore that sperm competition may strongly mould sperm traits and drive reproductive performance in eusocial Hymenoptera.
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