Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis.

@article{Cotter2008SelectionFC,
  title={Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis.},
  author={Sheena C Cotter and Julia P. Myatt and Clare McW H Benskin and Kate L Wilson},
  journal={Journal of evolutionary biology},
  year={2008},
  volume={21 6},
  pages={1744-54}
}
Several insect species show an increase in cuticular melanism in response to high densities. In some species, there is evidence that this melanism is correlated with an up-regulation of certain immune system components, particularly phenoloxidase (PO) activity, and with the down-regulation of lysozyme activity, suggesting a trade-off between the two traits. As melanism has a genetic component, we selected both melanic and nonmelanic lines of the phase-polyphenic lepidopteran, Spodoptera… CONTINUE READING