Hdl Handle:
http://hdl.handle.net/10545/592753
Title:
The function of nuptial feeding in insects: a review of empirical studies
Authors:
Vahed, Karim
Abstract:
Nuptial feeding encompasses any form of nutrient transfer from the male to the female during or directly after courtship and/or copulation. In insects, nuptial gifts may take the form of food captured or collected by the male, parts, or even the whole of the male's body, or glandular products of the male such as salivary secretions, external glandular secretions, the spermatophore and substances in the ejaculate. Over the past decade, there has been considerable debate over the current function of nuptial feeding in insects. This debate has centred on the issue of whether nuptial gifts function as paternal investment (i.e. function to increase the fitness and/or number of the gift-giving male's own offspring) or as mating effort (i.e. function to attract females, facilitate coupling, and/or to maximize ejaculate transfer), although the two hypotheses are not mutually exclusive. In the present article, evidence for the potential of nuptial gifts to function as either paternal investment, mating effort, or both is reviewed for each form of nuptial feeding in each insect taxon for which sufficient data are available. Empirical evidence suggests that many diverse forms of nuptial feeding in different insect taxa function, at least in part, as mating effort. For example, nuptial prey and salivary masses in the Mecoptera, regurgitated food in Drosophila (Diptera), hind-wing feeding in Cyphoderris (Orthoptera) and the secretion of the male's cephalic gland in Neopyrochroa (Coleoptera) and Zorotypus (Zoraptera) appear to function to entice females to copulate and/or to facilitate coupling. Nuptial prey and salivary masses in the Mecoptera also appear to function to maximize ejaculate transfer (which is also a form of mating effort), as do nuptial prey in Empis (Diptera), external glandular secretions in Oecanthus and Allonemobius (Orthoptera) and the spermatophylax in gryllids and tettigoniids (Orthoptera). Large spermatophores in, for example, the Lepidoptera and Coleoptera, also appear to be maintained by selection on the male to maximize ejaculate transfer and thereby counter the effects of sperm competition. In contrast to the large amount of evidence in support of the mating effort hypothesis, there is a relative lack of good evidence to support the paternal investment hypothesis. Certain studies have demonstrated an increase in the weight and/or number of eggs laid as a result of the receipt of larger gifts, or a greater number of gifts, in tettigoniids, gryllids, acridids, mantids, bruchid beetles, drosophilids and lepidopterans. However, virtually all of these studies (with the possible exception of studies of the spermatophylax in tettigoniids) have failed to control adequately for hormonal substances in the ejaculate that are known to affect female reproductive output. Furthermore, in at least four tettigoniids (but not in the case of two species), three lepidopterans, a drosophilid and probably also bruchid beetles and bittacids, evidence suggests that the male has a low probability of fertilising the eggs that stand to benefit from his nuptial gift nutrients. Therefore, the hypothesis that paternal investment might account for the function of nuptial gifts in general is not supported.
Affiliation:
University of Derby
Citation:
VAHED, K. (1998), The function of nuptial feeding in insects: a review of empirical studies. Biological Reviews, 73: 43–78. doi: 10.1111/j.1469-185X.1997.tb00025.x
Publisher:
Wiley
Journal:
Biological Reviews
Issue Date:
1998
URI:
http://hdl.handle.net/10545/592753
DOI:
10.1111/j.1469-185X.1997.tb00025.x
Additional Links:
http://doi.wiley.com/10.1111/j.1469-185X.1997.tb00025.x
Type:
Article
Language:
en
Series/Report no.:
Vo. 73; Issue 1
ISSN:
14647931
Appears in Collections:
Environmental Sustainability Research Centre

Full metadata record

DC FieldValue Language
dc.contributor.authorVahed, Karimen
dc.date.accessioned2016-01-04T14:21:02Zen
dc.date.available2016-01-04T14:21:02Zen
dc.date.issued1998en
dc.identifier.citationVAHED, K. (1998), The function of nuptial feeding in insects: a review of empirical studies. Biological Reviews, 73: 43–78. doi: 10.1111/j.1469-185X.1997.tb00025.xen
dc.identifier.issn14647931en
dc.identifier.doi10.1111/j.1469-185X.1997.tb00025.xen
dc.identifier.urihttp://hdl.handle.net/10545/592753en
dc.description.abstractNuptial feeding encompasses any form of nutrient transfer from the male to the female during or directly after courtship and/or copulation. In insects, nuptial gifts may take the form of food captured or collected by the male, parts, or even the whole of the male's body, or glandular products of the male such as salivary secretions, external glandular secretions, the spermatophore and substances in the ejaculate. Over the past decade, there has been considerable debate over the current function of nuptial feeding in insects. This debate has centred on the issue of whether nuptial gifts function as paternal investment (i.e. function to increase the fitness and/or number of the gift-giving male's own offspring) or as mating effort (i.e. function to attract females, facilitate coupling, and/or to maximize ejaculate transfer), although the two hypotheses are not mutually exclusive. In the present article, evidence for the potential of nuptial gifts to function as either paternal investment, mating effort, or both is reviewed for each form of nuptial feeding in each insect taxon for which sufficient data are available. Empirical evidence suggests that many diverse forms of nuptial feeding in different insect taxa function, at least in part, as mating effort. For example, nuptial prey and salivary masses in the Mecoptera, regurgitated food in Drosophila (Diptera), hind-wing feeding in Cyphoderris (Orthoptera) and the secretion of the male's cephalic gland in Neopyrochroa (Coleoptera) and Zorotypus (Zoraptera) appear to function to entice females to copulate and/or to facilitate coupling. Nuptial prey and salivary masses in the Mecoptera also appear to function to maximize ejaculate transfer (which is also a form of mating effort), as do nuptial prey in Empis (Diptera), external glandular secretions in Oecanthus and Allonemobius (Orthoptera) and the spermatophylax in gryllids and tettigoniids (Orthoptera). Large spermatophores in, for example, the Lepidoptera and Coleoptera, also appear to be maintained by selection on the male to maximize ejaculate transfer and thereby counter the effects of sperm competition. In contrast to the large amount of evidence in support of the mating effort hypothesis, there is a relative lack of good evidence to support the paternal investment hypothesis. Certain studies have demonstrated an increase in the weight and/or number of eggs laid as a result of the receipt of larger gifts, or a greater number of gifts, in tettigoniids, gryllids, acridids, mantids, bruchid beetles, drosophilids and lepidopterans. However, virtually all of these studies (with the possible exception of studies of the spermatophylax in tettigoniids) have failed to control adequately for hormonal substances in the ejaculate that are known to affect female reproductive output. Furthermore, in at least four tettigoniids (but not in the case of two species), three lepidopterans, a drosophilid and probably also bruchid beetles and bittacids, evidence suggests that the male has a low probability of fertilising the eggs that stand to benefit from his nuptial gift nutrients. Therefore, the hypothesis that paternal investment might account for the function of nuptial gifts in general is not supported.en
dc.language.isoenen
dc.publisherWileyen
dc.relation.ispartofseriesVo. 73en
dc.relation.ispartofseriesIssue 1en
dc.relation.urlhttp://doi.wiley.com/10.1111/j.1469-185X.1997.tb00025.xen
dc.rightsArchived with thanks to Biological Reviewsen
dc.subjectCourtship feedingen
dc.subjectMating efforten
dc.subjectNuptial giftsen
dc.subjectPaternal investmenten
dc.subjectSperm competitionen
dc.subjectSpermatophoreen
dc.subjectSexual cannibalismen
dc.subjectSpermatophylaxen
dc.titleThe function of nuptial feeding in insects: a review of empirical studiesen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.identifier.journalBiological Reviewsen
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