Effect of photoperiod (CFL Bulb,15Watts;04 hrs.) on breeding and growth performance of live bearer ornamental fishes

Abstract

The present study was conducted to find out impact of photoperiod on breeding, growth, maturation
and colour change of live bearer ornamental fishes(molly, guppy, platy and swordtail).CFL bulb used as
source of artificial light, maintained in each setups-I to IV for observing breeding and survival of brooder and
in the setups-A to D for growth and maturation of youngones, each for three months duration. During study
period, the average mean length, the average mean weight ,survival rate percent, specific growth rate percent
and average daily gain percent were observed. Water quality analysis were done throughout study period and
physico-chemical parameters such as temperature, pH, dissolved oxygen, nitrite, ammonia, phosphate and
total hardness were measured and maintained using standard water analysis kits.Siphoning done weekly.
Feeding were done using freeze dried live feed (tubifex and bloodworm)and dried pelleted feed(optimum and
tokyu) ,two times( morning and evening) for brooder and four times for youngones in a day with timing 7a.m.,
11a.m.,3p.m. and 7p.m. During study period, it was observed that the increasement in growth found from first
month to third months. Also increased in the length and the weight of youngones in each setups during the
same time period vary and there were no similarity. The maximum specific growth rate percent was found in
setup-D(0.37) and minimum in setup-B(0.1166).The maximum average daily gain percent was found maximum
in setup-D(0.2466) and minimum in setup-B(0.0777).The maturity of youngones visible at the end of third
months. No colour change was observed on brooder and youngones. The aim of present study was to find out
whether photoperiods(CFL bulb,15watts,04hrs.) was best suited for breeding, survival, growth and maturation
of these fishes or not, inorder to have a healthy crops,which going to make our country compete with world
market as well boost our national income,prestige and also act as strong weapon in eradicating unemployment
problem.