scholarly journals Multiple biomarkers response in Nile tilapia, Oreochromis niloticus (L.) exposed to sublethal concentrations of hexavalent chromium

2016 ◽  
Vol 20 (2) ◽  
pp. 37-49
Author(s):  
Iman Elsaeidy ◽  
Hanaa Assem ◽  
Gamal Edrees ◽  
Azza Khalifa
Keyword(s):  
Hexavalent Chromium ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Multiple Biomarkers ◽  
Sublethal Concentrations

Immunologic parameters evaluations in Nile tilapia (Oreochromis niloticus) exposed to sublethal concentrations of diazinon

2009 ◽  
Vol 27 (2) ◽  
pp. 383-385 ◽  
Author(s):  
M.I. Girón-Pérez ◽  
J. Velázquez-Fernández ◽  
K. Díaz-Resendiz ◽  
F. Díaz-Salas ◽  
C. Canto-Montero ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Sublethal Concentrations ◽  
Immunologic Parameters

scholarly journals Behavioral responses of Nile tilapia (Oreochromis niloticus) by sublethal exposure to chlorpyrifos: a case study in Twin Lakes of West Sumatra

2018 ◽  
Vol 5 (4) ◽  
pp. 205-210
Author(s):  
Taufiq Ihsan ◽  
Tivany Edwin ◽  
Winna Anggraeni
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Behavioral Responses ◽  
Behavioral Changes ◽  
Test Species ◽  
Nile Tilapia Oreochromis Niloticus ◽  
West Sumatra ◽  
Contact Poison ◽  
Sublethal Concentrations

Background: The most commonly used insecticide by 99.8% farmers in West Sumatra, is chlorpyrifos which contains organophosphates. Chlorpyrifos is used to kill insects and other pests and works as the contact poison, gastric toxins, and inhalation. It is very useful for farmers in keeping the plants such as corn, citrus, peanuts, and so forth. Chlorpyrifos can enter the water body with direct application to control pests or indirectly through either spraying or washing during high rainfall in spray applications for plant leaves. Chlorpyrifos is also used in farming in the region of Twin Lakes (Diatas Lake and Dibawah Lake), West Sumatra, Indonesia. One of the most important fish that is cultivated in this region is Nile tilapia (Oreochromis niloticus). Methods: The acute toxicity (LC50-96 h) of chlorpyrifos for Nile tilapia in studies was 0.076 mg/L. Sublethal concentrations used for the studies were one-seventh (0.011 mg/L) and one-fourteenth (0.005 mg/L) of the LC50-96 h. The test animal was exposed to the both sublethal concentrations for 1, 7 and 14 days. Behavioral responses were studied in the experimental periods. Tilapia that exposed chlorpyrifos exposure was exhibited irregular body movements, gills and fins motion, mucus secretion, breathing at the surface, and anal excretion. Results: It was revealed that the longer the exposure time, the more visible behavioral changes in fish, as well as the concentration variations, it means that the higher the concentration, the more visible changes in physiological behavior of fish. Correlation values (R) were was 0.75–0.99. Conclusion: These behavioral responses can be used as a tool in biomonitoring program to monitor ecotoxicity risk of chlorpyrifos to the test species, especially in the region of Twin Lakes, West Sumatra, Indonesia.

The Impact of Sublethal Concentrations of Treated Leachate on Nile tilápia (Oreochromis niloticus)

2019 ◽  
Vol 102 (4) ◽  
pp. 519-524
Author(s):  
Michel Gallão ◽  
Karla G. Gnocchi ◽  
Luciano R. Carvalho ◽  
Bruno F. Silva ◽  
Andressa N. Barbosa ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Nile Tilapia Oreochromis Niloticus ◽  
The Impact ◽  
Sublethal Concentrations

Histological Changes in Targeted Organs of Nile Tilapia (Oreochromis niloticus) Exposed to Sublethal Concentrations of the Pesticide Carbofuran

2020 ◽  
Vol 231 (5) ◽  
Author(s):  
Juliana Heloisa Pinê Américo-Pinheiro ◽  
Angela Aparecida Machado ◽  
Claudinei da Cruz ◽  
Mario Mamede Aguiar ◽  
Luiz Fernando Romanholo Ferreira ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Histological Changes ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Sublethal Concentrations

The effect of vaccination in controling bacterial disease caused by Aeromonas hydrophila in nile tilapia (Oreochromis niloticus)

2014 ◽  
pp. 27
Author(s):  
Arne A Ratulangi ◽  
Reiny Tumbol ◽  
Hengky Manoppo ◽  
Henneke Pangkey
Keyword(s):  
Survival Rate ◽  
Aeromonas Hydrophila ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Bacterial Disease ◽  
Immersion Method ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Different Ages ◽  
Motile Aeromonas Septicaemia

This study aims to apply vaccination against bacterial disease. The purpose of vaccination is to trigger the immune respone both non-specific and specific of fish against bacteria Motile Aeromonas Septicaemia (MAS) caused by Aeromonas hydrophila. The vaccination for fish with different ages: 2-3 weeks and 5 weeks were done using immersion method. The fish were re-vaccinated (booster) after two weeks of the first vaccination. The survival rate was < 50 % for juveniles 2-3 weeks and > 50% for juveniles 5 weeks. Survival rate for juveniles 5 weeks was higher than juveniles of 2-3 weeks. This shows that organs of juveniles of 5 weeks were more complete than the 2-3 weeks juveniles. The age of fish is one of the important factors for successfully vaccination. Penelitian ini bertujuan untuk melakukan penerapan vaksinasi terhadap penyakit bakterial. Vaksinasi ditujukan untuk merangsang respon kekebalan non- spesifik dan spesifik pada tubuh ikan terhadap penyakit Motile Aeromonas Septicaemia (MAS) yang disebabkan oleh bakteri Aeromonas hydrophila. Vaksin diberikan pada benih ikan nila yang berbeda umur yaitu 2-3 minggu dan 5 minggu dengan menggunakan metode perendaman. Ikan divaksinasi ulang (booster) setelah 2 (dua) minggu dari vaksinasi yang pertama. Prosentase kelangsungan hidup < 50 % untuk benih umur 2-3 minggu dan > 50% untuk benih umur 5 minggu. Jumlah kematian benih umur 2-3 minggu lebih tinggi dari 5 minggu. Hal ini menunjukkan bahwa fungsi organ benih umur 5 minggu telah lebih lengkap dari pada benih umur 2-3 minggu. Umur ikan merupakan salah satu faktor penting penentu keberhasilan suatu kegiatan vaksinasi.

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