Impacts of microplastics on reproductive performance of male tilapia (Oreochromis niloticus) pre-fed on Amphora coffeaeformis

2021 ◽  
Author(s):  
Rania F. Ismail ◽  
Norhan E. Saleh ◽  
Alaa El-Din H. Sayed
Keyword(s):  
Reproductive Performance ◽  
Oreochromis Niloticus ◽  
Amphora Coffeaeformis

scholarly journals Microplastics induced endocrine disruption, alteration in testicular tissue in tilapia (Oreochromis niloticus) pre-fed on Amphora coffeaeformis

2021 ◽  
Author(s):  
Rania F. Ismail ◽  
Norhan E. Saleh ◽  
Alaa El-Din H. Sayed
Keyword(s):  
Endocrine Disruption ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Testicular Tissue ◽  
Degenerative Changes ◽  
Feed Additive ◽  
Negative Effects ◽  
Exposed Fish ◽  
Natural Remedy ◽  
Amphora Coffeaeformis

Abstract This study examines the potential defending effects of the diatom, Amphora coffeaeformis, as a feed additive against the deleterious effects (mainly on gonads) caused by microplastics (MPs) in the Nile tilapia, Oreochromes niloticus. Male tilapia groups were pre-fed diets with four different supplementation levels of A. coffeaeformis (0%, 2.5%, 5% and 7.5%) for 70 days, then were exposed to 10 mg/L MPs for 15 days. The results showed significantly (p < 0.05) higher numbers of erythrocytes, but significant decreases (p < 0.05) in the number of RBCs, Hb, Ht, platelets, and eosinophil percentages. Testicular histological degenerative changes and testis-ova were found in the MPs-exposed fish. Thus, A. coffeaeformis supplementation displayed ameliorative properties that detoxified the negative effects of MPs. This study provides a better understanding of the reproductive injuries caused by MPs and provides evidence for the use of A. coffeaeformis as a natural remedy in freshwater tilapia.

scholarly journals Reproductive performance of female Nile tilapia Oreochromis niloticus L. in South Kivu (DR Congo): comparison of two strains differing in origin and history of domestication

2019 ◽  
Vol 7 (08) ◽  
Author(s):  
Nihoreye, F.J. ◽  
Nyongombe, U.N. ◽  
Alunga, L.G. ◽  
Akonkwa, B.D. ◽  
Isumbisho, M.P. ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Oreochromis Niloticus ◽  
Sexual Maturity ◽  
Democratic Republic Of Congo ◽  
Local Strain ◽  
Fish Farming ◽  
Nile Tilapia Oreochromis Niloticus ◽  
History Of ◽  
South Kivu ◽  
Egg Diameter

This study was conducted to evaluate the reproductive performance of females of Oreochromis niloticus originating from a strain of distant origin and extensively exploited in fish farming (Nyakabera strain) and a local strain recently removed from the natural environment (Lac Kivu strain). The experiment was carried out in triplicate with fry of 4.9 to 6.3 g placed in earthen ponds for a period of 6 months, at the Nyakabera fish station in South Kivu, Democratic Republic of Congo. The comparison of the two strains focused on the size of the first sexual maturity, gonado-somatic ratio, fecundity, egg diameter and condition factor. The results showed that under similar managed rearing conditions, the Nyakabera strain reaches sexual maturity earlier and is characterized by a higher gonado-somatic ratio and higher relative fertility, but a worse condition compared to the Lac Kivu strain. These differences, which indicate a better reproductive success of the Nyakabera strain, are related to the origin and the history of domestication, which are just as different from these two strains.

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