| morphological and reproductive characteristics of male mosquitofish (gambusia affinis holbrooki) inhabiting sewage-contaminated waters in new south wales, australia. | the potential effects of exposure of fish to reproductive endocrine disruptors (reds) is of major concern. this study reports on the effects of sewage effluent exposure on morphology of male mosquitofish (gambusia a. holbrooki) in a tributary of the hawksbury-nepean river system in new south wales, australia. the growth and development of the modified anal fin (the gonopodium, gp) is a secondary sexual characteristic in males, forms under the influence of testosterone, and is critical for sperm ... | 1999 | 10047598 |