نوع مقاله : مقاله پژوهشی
نویسندگان
گروه تکثیر وپرورش آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The aim of this research was to investigate the effects of various dry (commercial), live food (bloodworm larvae), diet (calf’s liver and heart) and combined diet (50% bloodworm larvae + 50% calf’s liver and heart) on fertilization rate, hatching percentage, survival rate of larvae and consecutive spawning intervals, as well as on growth factors and survival of infants until 60 years of age. Experiment with 4 groups including concentrate (A), bloodworm larvae (B), heart and liver of cattle (C) and the group consisting of 50% calf’s liver and heart and 50% larvae of bloodworm (D). In this experiment, 12 pair of angel fish broodstockes were used in twelve 60l glass aquaria. Of roups were treated with more rations of the live food and mixed diet had the highest fecundity and survival rate of larvae than controls (A). The percentage of hatching was the highest in the combined diet group. The time interval between consecutive spawning in the group fed live food and mixed diet was significantly shorter than others. Also, it was found that in the groups fed live and mixed food, fry showed improvement of the growth parameters. The results showed that the presence of live food in ornamental fish diet can affect the reproductive capacity as well as the growth of its fry.
کلیدواژهها [English]
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