Factors affecting the body size at maturation of aquatic insects.
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概要
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Body size at maturation of aquatic insects differs individually or between populations. In this review, variations in the body size at maturity (a total of 112 examples) are classified into six categories ; intra-cohort, seasonal, annual, inter-habitat, and geographic variations, and those observed under experimental conditions. Individuals exposed to lower temperature tend to mature at a larger size, but in some cases, the inverse relationship is observed. Larger adults are always obtained in conditions of increased food availability or high quality of food. Body size at maturity decreases with increasing population density in all examples dealing with the density effect on adult body size. Predation pressure, photoperiod and competition may be other important factors changing the adult body size, but there have only been a few studies in this area. Finally, the adaptive significance of the size at maturation is discussed in relation to various aspects of the life history of aquatic insects.
- 日本陸水学会の論文
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