Male larval experience of cues from adult rivals alters lifetime sperm investment patterns in a sperm heteromorphic moth, Ephestia kuehniella

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dc.contributor.authorLiu J
dc.contributor.authorHe XZ
dc.contributor.authorWang Q
dc.date.accessioned2023-05-11T19:38:30Z
dc.date.available2023-05-11
dc.date.available2023-05-11T19:38:30Z
dc.date.issued2023-05-11
dc.description.abstractMale animals may adjust their resource allocations for reproduction and other fitness functions in response to cues from rivals. For instance, adult males increase their investment in sperm for a higher paternity share when they perceive sperm competition risk in their surroundings. In nature, both juveniles and adults may coexist spatially and temporally. Yet, it is not clear how juvenile males of different ages respond to cues from adult rivals and fine-tune their lifetime investment in sperm production and ejaculation in any insect. Here we used the Mediterranean flour moth, Ephestia kuehniella, which produces both fertile eupyrene and infertile apyrene sperm, to explore this question. We demonstrate that the late, but not early, instar larvae are sensitive to adult male cues. As a response, they produce more sperm before emergence and their resultant adults have shorter mating latency and ejaculate more sperm in the first few matings. When the juvenile stage produces more eupyrenes, the adult stops making these sperm, but regardless of the number of apyrenes produced during the juvenile stage, the adult continues to make them. These findings suggest that the number of permatogonia for eupyrenes may be limited and that for apyrenes may be flexible. Our results show that the insect does not trade off survival, mating frequency, body size, or testis size for sperm production in response to adult males during the larval stage. Knowledge created in the present study offers insight into the stage-dependent sensitivity of juvenile males to cues from adult rivals and subsequent lifetime resource allocations.
dc.description.confidentialfalse
dc.format.extent? - ? (11)
dc.identifier.citationInsect Science, 2023, pp. 1-12 (11)
dc.identifier.doi10.1111/1744-7917.13204
dc.identifier.elements-id461408
dc.identifier.harvestedMassey_Dark
dc.identifier.issn1005-295X
dc.languageEnglish
dc.publisherWiley
dc.relation.isPartOfInsect Science
dc.relation.urihttp://doi.org/10.1111/1744-7917.13204
dc.rights(c) The author/s CC BY-NC
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.anzsrc0501 Ecological Applications
dc.subject.anzsrc0608 Zoology
dc.titleMale larval experience of cues from adult rivals alters lifetime sperm investment patterns in a sperm heteromorphic moth, Ephestia kuehniella
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
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