Relative growth and morphological variability IN Ischnura evansi (morton)‎ (odonata : coenagrionidae

Abstract EN

-Morphological variability was studied in a laboratory reared adults of Ischnura evansi.

Total body length, head width, thorax length,abdomen length and width length were measured in 44 S and 69 $ phenotype (23 blue, 28 orange and 18 orange-brown females).

Result indicated that males were smaller than females in all character, females phenotypes were significant difference, linear regression equation for relationship between body length and abdomen length as well as wing length for males and females are significant.Gynochrome 2females were larger than androchromes, as body size is related to larval nourishment, this suggest an effect of maintenance of polymorphism.

The difference of the mean body mass between sexes is significant, head width and wing length increased with body length.