Please use this identifier to cite or link to this item: https://libjncir.jncasr.ac.in/xmlui/handle/10572/2161
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dc.contributor.authorNagarajan, Archana
dc.contributor.authorNatarajan, Sharmila Bharathi
dc.contributor.authorJayaram, Mohan
dc.contributor.authorThammanna, Ananda
dc.contributor.authorChari, Sudarshan
dc.contributor.authorBose, Joy
dc.contributor.authorJois, Shreyas V.
dc.contributor.authorJoshi, Amitabh
dc.date.accessioned2017-01-24T06:27:38Z-
dc.date.available2017-01-24T06:27:38Z-
dc.date.issued2016
dc.identifier.citationNagarajan, A.; Natarajan, S. B.; Jayaram, M.; Thammanna, A.; Chari, S.; Bose, J.; Jois, S. V.; Joshi, A., Adaptation to larval crowding in Drosophila ananassae and Drosophila nasuta nasuta: increased larval competitive ability without increased larval feeding rate. Journal of Genetics 2016, 95 (2), 411-425 http://dx.doi.org/10.1007/s12041-016-0655-9en_US
dc.identifier.citationJournal of Geneticsen_US
dc.identifier.citation95en_US
dc.identifier.citation2en_US
dc.identifier.issn0022-1333
dc.identifier.urihttps://libjncir.jncasr.ac.in/xmlui/10572/2161-
dc.descriptionOpen Accessen_US
dc.description.abstractThe standard view of adaptation to larval crowding in fruitflies, built on results from 25 years of multiple experimental evolution studies on Drosophila melanogaster, was that enhanced competitive ability evolves primarily through increased larval feeding and foraging rate, and increased larval tolerance to nitrogenous wastes, at the cost of efficiency of food conversion to biomass. These results were at odds from the predictions of classical K-selection theory, notably the expectation that selection at high density should result in the increase of efficiency of conversion of food to biomass, and were better interpreted through the lens of alpha-selection. We show here that populations of D. ananassae and D. n. nasuta subjected to extreme larval crowding evolve greater competitive ability and pre-adult survivorship at high density, primarily through a combination of reduced larval duration, faster attainment of minimum critical size for pupation, greater time efficiency of food conversion to biomass and increased pupation height, with a relatively small role of increased urea/ammonia tolerance, if at all. This is a very different suite of traits than that seen to evolve under similar selection in D. melanogaster, and seems to be closer to the expectations from the canonical theory of K-selection. We also discuss possible reasons for these differences in results across the three species. Overall, the results reinforce the view that our understanding of the evolution of competitive ability in fruitflies needs to be more nuanced than before, with an appreciation that there may be multiple evolutionary routes through which higher competitive ability can be attained.en_US
dc.description.uri0973-7731en_US
dc.description.urihttp://dx.doi.org/10.1007/s12041-016-0655-9en_US
dc.language.isoEnglishen_US
dc.publisherIndian Academy Sciencesen_US
dc.rights@Indian Academy Sciences, 2016en_US
dc.subjectGenetics & Heredityen_US
dc.subjectlife-history evolutionen_US
dc.subjectexperimental evolutionen_US
dc.subjectdevelopment timeen_US
dc.subjectdry weighten_US
dc.subjectcompetitionen_US
dc.subjectK-selectionen_US
dc.subjectDependent Natural-Selectionen_US
dc.subjectLife-Historyen_US
dc.subjectAdaptive Evolutionen_US
dc.subjectFaster Developmenten_US
dc.subjectStress Resistanceen_US
dc.subjectForaging Behavioren_US
dc.subjectDevelopment Timeen_US
dc.subjectPupation Heighten_US
dc.subjectK-Selectionen_US
dc.subjectTrade-Offen_US
dc.titleAdaptation to larval crowding in Drosophila ananassae and Drosophila nasuta nasuta: increased larval competitive ability without increased larval feeding rateen_US
dc.typeArticleen_US
Appears in Collections:Research Articles (Amitabh Joshi)

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