Abstract
The two forms of Stigmaeopsis miscanthi (Saito) (called LW and HG) differ in their levels of male-to-male aggression, differ in their diapause attributes, and morphologically in the male leg I armor. Furthermore, a type of reproductive isolation exists between the forms, although some one-way compatibility is maintained. Here we looked for any differences in life history traits between the two forms under experimental conditions. The intrinsic rate of natural increase (r m ) of the LW form was lower than that of the HG form, the difference seemingly caused by the developmental speed of the latter. Although the developmental speeds of HG under several temperature regimens were significantly higher than those of LW, the low development threshold temperatures of the two forms were almost identical. This study addresses why a significant difference in r m exists in relation to other behavior and physiological (diapause) adaptations.
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Acknowledgments
We thank Drs. M. W. Sabelis, T. Takada, K. Sahara, K. Ito, T. Sakagami, K. Mori and Mr. Y. Uchida for their valuable comments and help. We also thank Dr. A.R. Chittenden for English editing and valuable suggestions. This research was supported by Grants-in-Aid no. 23405005 and 24570013 for Scientific Research (B) from JSPS.
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Saito, Y., Kanazawa, M. & Sato, Y. Life history differences between two forms of the social spider mite, Stigmaeopsis miscanthi . Exp Appl Acarol 60, 313–320 (2013). https://doi.org/10.1007/s10493-012-9646-6
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DOI: https://doi.org/10.1007/s10493-012-9646-6