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J Insect Sci
2011 Jan 01;11:131. doi: 10.1673/031.011.13101.
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Environmental conditions influence allometric patterns in the blow fly, Chrysomya albiceps.
Horenstein MB
,
Peretti AV
.
Abstract
The objective of this research was to study variations in allometry of body characters in females and males of two populations of blow flies, Chrysomya albiceps (Wiedemann) (Diptera: Calliphoridae), under different environmental conditions to establish patterns of morphological variation. Body size of both males and females in the experimental population was significantly higher than in the individuals of the natural population, indicating an important influence of food on body size. All genitalic and non-genitalic characters in males and females of the two populations showed a trend towards negative allometry rather than isometry. Allometric patterns were modified in both sexes and between populations. The data show generally larger allometric slopes in females than in males. We confirmed that the environmental conditions have an important effect on allometric patterns and body size.
Figure 1. . Traits measured in both sexes of each population: a) wing length; b) thorax length; c) fore tibia length; d) aedeagus length; e) male cerci and surstyli length; f) female cerci length; g) spermatheca area. Scale bars: 1 mm. High quality figures are available online.
Figure 2. . Scatter plots of the significant relationships between body size (thorax length) and non-genitalic characters in males of the natural population. Both side of each trait show the same pattern. High quality figures are available online.
Figure 3. . Scatter plots of the significant relationships between body size (thorax length) and genitalic and non-genitalic characters in females of the natural population. Both side of each trait and the three spermathecae show the same pattern. High quality figures are available online.
Figure 4. . Scatter plots of the significant relationships between body size (thorax length) and non-genitalic characters in males of the experimental population. Both side of each trait show the same pattern. High quality figures are available online.
Figure 5. . Scatter plots of the significant relationships between body size (thorax length) and genitalic and non-genitalic characters in females of the experimental population. Both side of each trait show the same pattern but only spermatheca I was statistically significant. High quality figures are available online.
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