تاثير ناپليوس آرتميا بر روي تخمريزي، هم آوري ، درصد لقاح و رشد فرشته ماهي (Pterophyllum scalar)

The effect of Artemia nauplii on spawning,fecundity,percent of fertilization and growth of Angel fish (Pterophyllum scalar)

فرشته ماهي آب شيرين زياد مورد توجه آكواريوميست ها قرار گرفته است، اما هنوز اطلاعات كمي در زمينه پرورش و نگهداري آنها در آكواريوم موجود است. در اين تحقيق، اثرات رژيم غذايي مختلف روي رشد و بازده تكثير فرشته ماهي، در طول 40 روز مطالعه شد. سه رژيم غذايي مختلف 1) غذاي خشك كارخانه چينه (لوفك)، 2) ناپليوس آرتميا و 3) دل گاو چرخ شده (به مدت 10 روز) و غذاي خشك كارخانه چينه (لوفك) به مدت 30 روز، در سه تكرار براي 9 جفت مولد استفاده شد. مولدين رژيم غذايي 2 ماكزيمم تعداد تخم (461 عدد) و درصد لقاح (53/55 درصد) رادر مرحله اول تخمريزي نشان دادند و بين رژيم هاي غذايي مختلف اختلاف معني دار مشاهده شد (05/0P < ). اما اختلاف معني داري بين رژيم غذايي1و3 در مرحله اول تخمريزي مشاهده نشد (05/0 P > ). همچنين زيست سنجي در هر مرحله بر روي 30 لارو از هر تيمار انجام گرفت. نتايج نشان دادند كه بالاترين وزن و طول لاروها در طي روزهاي13،22و35 از مولدين با رژيم غذايي 2 بدست آمد (05/0 P < ).

The freshwater angelfishes (Pteophyllum) that have become very popular among aquarists, yet scarce information on their culture and aquarium husbandry exist. In this paper we studied the effects of different feeding regimes on growth and reproduction of Pterophyllum scalar during 40 days culture period. .three diets were used: 1) commercial dry fish food, 2) Artemia nauplii and 3) ground cow heart (during 10 days) were used for 9 pairs angel fish broodstocks Three replications were used in each treatment. With diet 2, females reached a maximum fecundity (first spawning, 461eggs) and percent of fertilization (first spawning, 55.53%). Significant differences were observed between diet 2 and diet 1 and diet 3 (P < 0.05), but no significantly differences were observed between 1 and 3(P > 0.05). Also the results showed that larvae of treatment 1 had the highest weight and length during three stages of biometry. Biometry was conducted on 30 larvae in each treatment. Weight of larvae had significantly different in days of 13, 22 and 35 with treatment 1and treatment 3(P < 0.05).