| Titles |
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English :
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Fertility efficacy in relation to bacterial infection in freshwater fish
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Arabic :
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- كفاءة الخصوبة وعلاقتها بالعدوى البكتيرية فى اسماك المياه العذبة
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| Abstract |
This was an attempt to identify the severe effects of commensal bacteria on fish fecundity. Aeromonas hydrophila was isolated from apparently healthy Orechromis niloticus ovaries, testes, livers, fry and unfertilized eggs.
Bacterial infection caused decrease of male's fertility represented in significant drop of: Sperm density, live spermatozoa %, male's gonadosomatic index (IG), Osmolality and Na concentration. The testes were seen congested with atrophy or absence of some spermatogenic stages.
Female's fecundity was also highly impaired through significant drop of relative fecundity, absolute fecundity, gonadosomatic index (IG), hepatosomatic index (IH), condition factor (K) and total protein (T.P.) level.
This study was the first to throw light on the dangerous multiple effects of A.hydrophila through affecting gonads of breeders, thus decreasing their fecundity, being transmitted to unfertilized eggs, causing their immaturity and finally affecting the fry by increasing their mortality.
The authors recommend early detection of bacterial carriers and sanitary culture systems as the only way for obtaining free breeders with highly efficient fecundity.
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| Publication year |
2004
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| Pages |
291--206
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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 |
المجلة المصرية لبيولوجيا الأسماك والمصايد
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| Department |
Fish Diseases
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| Author(s) from ARC |
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| Agris Categories |
Veterinary science and hygiene - General aspects
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AGROVOC
TERMS |
Bacterioses.
Disease transmission.
Fertility.
Freshwater fishes.
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| Proposed Agrovoc |
bacterial infection ;Fertility efficacy;
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| Publication Type |
Journal
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