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Developmental instability in a stem-mining sawfly: can fluctuating asymmetry detect plant host stress in a model system?

Post Date: Jun 08, 2008 5:12 a.m.
Ranked website: citeulike.org (Ranks #8098 of 3,783,534)

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http://www.citeulike.org/user/EschenbaecherS/article/2873424

Oecologia, Vol. 156, No. 3. (7 June 2008), pp. 505-513. Abstract Fluctuating asymmetry (FA) may be a sensitive indicator of the stress experienced by organisms during their development. Its use in this manner is an intuitively appealing, frequently proposed, and potentially powerful tool but remains controversial partially because its underlying premise rarely has been critically tested. Such tests should include direct comparisons among individuals for which levels of FA, stress and fitness have been unambiguously quantified. We assessed the use of FA as a bioindicator of the stress experienced during egg-to-adult development by the stem-mining sawfly, Cephus cinctus Norton. Sawflies were reared in a common garden from seven different wheat cultivars, which were selected to represent a gradient of stem solidness, a key factor imposing stress on sawflies during development. In this model system, stress was quantified by the weight of emergent adults. Fitne...

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