Locust Phase Polyphenism: An Update

@article{Simpson2009LocustPP,
  title={Locust Phase Polyphenism: An Update},
  author={Stephen James Simpson and Meir Paul Pener},
  journal={Advances in Insect Physiology},
  year={2009},
  volume={36},
  pages={1-272}
}
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The present paper concerns the desert locust, Schistocerca gregaria, which has been the subject of most of the recent research, and is structured according to the major issues considered.
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Decades of research revealed that phase transition implies changes in morphometry, the color of the cuticle, behavior and several aspects of physiology, and the answer to the most intriguing question, whether or not there is a primordial molecular inducer of phase transition, is probably not within reach in the very near future.
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It is remarkable that the prothoracic glands persist longer in isolated‐reared adults, which implies that these glands continue to play a role, although they no longer release important amounts of ecdysteroids.
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There is evidence that phase gregaria locusts are more adult and less vegetative than solitaria, not only behaviourally and morphologically but also in their lesser fecundity and longevity.
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