author(s)
Tarang Kumar Shah, Dr. VP Saini and Dr. ML Ojha

abstract
The effect of water temperature on sex ratio of guppy (Poecilia reticulate) was investigated. Treatments of 26, 28, 30, 32°C and control (normal temperature) were used on gravid female and rearing of hatchlings. The highest temperature treatment (32°C) caused the death of gravid females. In this experiment, female offspring production was found increased with decreasing temperature. As such the highest (66.67%) females were observed in control. Whereas the highest male (63.33%) were noticed in 30 ⁰C treatment. Generally, sex ratio biased to male and female at high and low temperature treatments respectively