| Titles |
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English :
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Effect of saprolegnia on reproductive performance of oreochromis niloticus fish with referring to treatment
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Arabic :
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دراسة تأثير فطر السبروليجنيا على الكفاءة التناسلية لأسماك البلطى النيلى مع الإشارة الى علاجها
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| Abstract |
The effect of saprolegina on reproductive. performance, percentage of spent females, numbers and development of eggs produced and the ratio of hatching and fry survival were studied in cultured Oreochromis niloticus fish either naturally infected with saprolegnia or in artificial hatcheries Clinically infected fish developed focal greyish white patches distributed in the head region as well as skin and body fins especially, the dorsal and caudal ones. Infected eggs in the artificial hatcheries were characterized clinically by cottony white to brownish growth. Percentage of spent females, number of collected eggs, hatching percentage and fry survival rate showed significant decrease in infected fish group compared with apparently health control group.
Treatment of infected fish group with either malachite green at a dose of 5 ppm a bath for one hour or formalin at a dose of 25 ppm as indefinite bath during the first day of stocking are quite enough to treat Saprolegniosis. Percentage of spent females, number of collected eggs, hatching percentage and fry survival rate in treated infected group were returned nearly toward the values of apparently healthy control group. Prophylactic treatment of collected eggs in the artificial hatcheries with a mixture of malachite green (0.1 mg/ L) and formalin (25 mg/ L) continuously, proved to be very important to avoid infection of eggs with Saprolegina, which leads to complete ceases of hatching percentage and fry survival rate.
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| Publication year |
2004
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| Pages |
من صفحة 365-374
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| Availability location |
مكتبة معهد بحوث صحة الحيوان 7 ش نادى الصيد- الدقى0
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| Availability number |
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| Organization Name |
Animal Health Research Institute (AHRI)
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| City |
القاهرة
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| serial title |
المؤتمرالدولى الأول لشعبة البحوث البيطرية المركز القومى للبحوث فى الفترة بين 15-17 فبراير من صفحة 365-374
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| Author(s) from ARC |
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| Agris Categories |
Animal diseases
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AGROVOC
TERMS |
Bacterioses.
Disease control.
Drugs.
Oreochromis niloticus.
Reproductive performance.
Saprolegnia.
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| Publication Type |
Conference/Workshop
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