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dc.contributor.author | Weldon, Christopher William![]() |
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dc.contributor.author | Mnguni, Sandiso![]() |
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dc.contributor.author | Demares, Fabien J.![]() |
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dc.contributor.author | Du Rand, Esther Elizabeth![]() |
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dc.contributor.author | Malod, Kevin![]() |
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dc.contributor.author | Manrakhan, Aruna![]() |
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dc.contributor.author | Nicolson, Sue W.![]() |
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dc.date.accessioned | 2019-06-24T12:00:33Z | |
dc.date.issued | 2019-03 | |
dc.description.abstract | Adult holometabolous insects may derive metabolic resources from either larval or adult feeding, but little is known of whether adult diets can compensate for deficiencies in the larval diet in terms of stress resistance. We investigated how stress resistance is affected and compensated for by diet across life stages in the marula fruit fly Ceratitis cosyra (Diptera: Tephritidae). Larvae were fed diets containing either 8% torula yeast, the standard diet used to rear this species, or 1% yeast (low protein content similar to known host fruit). At emergence, adults from each larval diet were tested for initial mass, water content, body composition, and desiccation and starvation resistance or they were allocated to one of two adult diet treatments: sucrose only, or sucrose and yeast hydrolysate. The same assays were then repeated after 10 days of adult feeding. Development on a low protein larval diet led to lower body mass and improved desiccation and starvation resistance in newly emerged adults, even though adults from the high protein larval diet had the highest water content. Adult feeding decreased desiccation or starvation resistance, regardless of the diet provided. Irrespective of larval diet history, newly emerged, unfed adults had significantly higher dehydration tolerance than those that were fed. Lipid reserves played a role in starvation resistance. There was no evidence for metabolic water from stored nutrients extending desiccation resistance. Our findings show the possibility of a nutrient-poor larval environment leading to correlated improvement in adult performance, at least in the short term. | en_ZA |
dc.description.department | Zoology and Entomology | en_ZA |
dc.description.embargo | 2020-03-27 | |
dc.description.librarian | am2019 | en_ZA |
dc.description.sponsorship | This research was supported by grants from Citrus Research International (project 1075), HortGro Science, and the South African Tablegrape Industry to C.W.W. Matching funds were provided by the South African government through its Technology and Human Resources for Industry Programme (THRIP; project 1207132909). S.M. received a Scarce Skills Honours Block Grant scholarship from the South African National Research Foundation (NRF) (PGS01) and a Department of Zoology and Entomology Honours Support Bursary. F.D. and E.E.d.R. were supported by postdoctoral fellowships from the University of Pretoria. K.M. received a grant holder-linked PhD bursary associated with an NRF Competitive Support for Rated Researchers grant to C.W.W. and S.W.N. (93686). | en_ZA |
dc.description.uri | http://jeb.biologists.org | en_ZA |
dc.identifier.citation | Weldon, C.W., Mnguni, S., Demares, F.J. et al. 2019, 'Adult diet does not compensate for impact of a poor larval diet on stress resistance in a tephritid fruit fly', Journal of Experimental Biology, vol. 222, part 6, art. jeb192534; pp. 1-13. | en_ZA |
dc.identifier.issn | 0022-0949 (print) | |
dc.identifier.issn | 1477-9145 (online) | |
dc.identifier.other | 10.1242/jeb.192534 | |
dc.identifier.uri | http://hdl.handle.net/2263/70284 | |
dc.language.iso | en | en_ZA |
dc.publisher | Company of Biologists | en_ZA |
dc.rights | © 2019. Published by The Company of Biologists Ltd. | en_ZA |
dc.subject | Body composition | en_ZA |
dc.subject | Dehydration tolerance | en_ZA |
dc.subject | Desiccation resistance | en_ZA |
dc.subject | Diet | en_ZA |
dc.subject | Starvation resistance | en_ZA |
dc.subject | Water content | en_ZA |
dc.subject | Life span | en_ZA |
dc.subject | Water balance | en_ZA |
dc.subject | Resource allocation (RA) | en_ZA |
dc.subject | Protein | en_ZA |
dc.subject | Nutrition | en_ZA |
dc.subject | Flies | en_ZA |
dc.subject | Reproduction | en_ZA |
dc.title | Adult diet does not compensate for impact of a poor larval diet on stress resistance in a tephritid fruit fly | en_ZA |
dc.type | Article | en_ZA |