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Articles by Ahmed I. Mehrim
Total Records ( 2 ) for Ahmed I. Mehrim
  Ahmed I. Mehrim , Fathy F. Khalil , Fayek H. Farrag and Mohamed M. Refaey
  Background and Objective: In recent years, many studies have tended to use herbal plants instead of drugs in fish farms, because they are safer and cheaper. This study aimed to compare the use of17α-methyltestosterone (17α-MT), pawpaw (Carica papaya) seeds powder (PSP) and neem (Azadirachta indica) leaves powder (NLP) as reproductive controller agents for Oreochromis niloticus. Materials and Methods: This experiment was divided into 2 consecutive periods, the 1st period was the treating period with dietary 17α-MT, PSP and NLP for 60 days. Then, the 2nd period was conducted for rearing the obtained fingerlings till the adult stage for 130 days. The treatments were (T1) hormone untreated mixed-sex fry, (T2) fry treated with 60 mg 17α-MT kg1 diet for 28 days, (T3) fry treated with 6 g PSP kg1 diet for 45 days and (T4) fry treated with 1 g NLP kg1 diet for 60 days. Results: Fish treated with 17α-MT gave the highest significant values of growth performance, highest male percentage and economic efficiency followed by PSP, then NLP compared to the mixed-sex group. While, fish treated with PSP were the worst significantly effects on sperm quality parameters. Hence, it could be concluded that addition of PSP improved growth performance, food efficiency and economic efficiency of O. niloticus nearly the same results were obtained by using 17α-MT. Conclusion: This means it is recommended for using PSP as a natural reproductive controller agent for O. niloticus, besides its prospective economically and safety effects on fish environment, production and human health than using 17α-MT.
  Ahmed I. Mehrim , Mohamed M. Refaey and Khaled M. Elmeleigy
  Aflatoxicosis is the poisoning that caused by aflatoxins in both humans and animals including fish. The present study aimed to investigate the capability of dietary Glutathione-enhancer™ (GSH-En) to detoxify the chronic toxic effects of aflatoxin B 1 (AFB 1) on Oreochromis niloticus for 10 weeks. Fish with an average initial body weight of 28.75±0.14 g were distributed into five treatments (three replicates in each). The AFB 1 was added at a concentration of 150 μg kg–1 diet to all mash Basal Diet (BD) (T 2 C+,T 3, T 4 and T 5), except AFB 1-free mash BD was considered as a negative control (T 1 C-) group. AFB 1-BD was considered as a positive control (T 2 C+). However, graded levels (50, 100 and 200 mg GSH kg–1 diet) as GSH-En were added to AFB 1-BD T 3, T 4 and T 5, respectively. The results revealed the adverse impacts of AFB 1 (T 2 C+) on growth and feed efficiency, fish carcass composition, condition factor and hepato-somatic index, hematological and serum biochemical parameters, reduction in tissues content of glutathione reduced and total antioxidant capacity, hepatic histological alterations, besides AFB 1-bioaccumulation in the tissues among all toxic groups. Dietary GSH-En was more effective to alleviate these toxicological effects of AFB 1, increasing levels dependent. Hence, it could be concluded that efficient use of GSH-En as a food additive, especially into the high level (200 mg kg–1 diet) against the toxicity of AFB 1 on O. niloticus. Also, dietary addition of GSH-En at this level may lead to access to safe fish product for human consumption and create more friendly-environment conditions for both fish production and human health.
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