M Sudagar - Department of Aquatic Reproduction and Breeding, Faculty of Fisheries and Environment, University of Agricultural Sciences and Natural Resources, Gorgan, Iran
A Hajibeglou - Department of Aquatic Reproduction and Breeding, Faculty of Fisheries and Environment, University of Agricultural Sciences and Natural Resources, Gorgan, Iran
F Norozi - Department of Aquatic Reproduction and Breeding, Faculty of Fisheries and Environment, University of Agricultural Sciences and Natural Resources, Gorgan, Iran
H Paknejad - Department of Aquatic Reproduction and Breeding, Faculty of Fisheries and Environment, University of Agricultural Sciences and Natural Resources, Gorgan, Iran

Fish feeding is considered one of the most important factors in aquaculture. Different percentages of feeding can have a great effect on the reproductive performance of fish. The present research was conducted to determine the effect of feeding percentages on the reproductive performance of guppy fish. In this research, ۱۸۰ pieces of ۲.۵-month-old guppy fish (۴۵ males and ۱۳۵ females) were distributed in ۱۵ aquariums with dimensions of ۶۰×۴۰×۳۰ cm including: ۵ treatments and ۳ replications and with the same rearing conditions. Fish in different treatments with different percentages (۱, ۲, ۳, ۴ and ۵% of body weight) ۳ times a day, with commercial food (manufactured by Biomar, France) for four months of feeding and reproductive performance (time) Sex, the time of first larva production and the number of produced larvae were evaluated The results showed that by increasing feeding percentages from ۱ to ۴%, the number of larvae born perbreeder increased and the difference between treatments was significant( p≤۰.۰۵), but from ۴ to ۵%, this difference was not significant(p≥۰.۰۵); Also, sexual maturation occurred ۱۳ days earlier in fish that were fed ۳ times a day than other treatments, while there was no significant difference between other treatments. And the first larvae born occurred in the ۳% body weight treatment, which showed a significant difference compared to other treatments (p≤۰.۰۵). This research showed that in the case of feeding fish with ۳% of body weight, sexual maturation and the first larvae produced occur earlier than other treatments, but the number of larvae produced in ۴% feeding was more than other treatments.

Feeding percentage, Reproductive performance, Guppy fish, Poecillia reticulata