| 3 | Isolation and Identification of Bacteria Found in the Milt of Cultured Clarias gariepinus显示文摘This study investigated bacteria that are associated with milt in cultured samples of African catfish-Clarias gariepinus.Male broodstocks of Clarias gariepinus were collected from private Fish Farm in Ogun State,Nigeria,while the fish’s milt was collected and analyzed for microbial load at laboratory of the Department of Microbiology,Federal University of Agriculture,Abeokuta,Ogun State.The molecular characterization of the amplicon was done at International Institute of Tropical Agriculture,Ibadan.Bio-edit was used for importing and mining nucleotide sequences into gene bank.As revealed by the results,bacterial organisms that were present in the milt of Clarias gariepinus are Aeromonas caviae,Proteus mirabilis,Serratia rubidaea,Pseudomonas mosselii,Acinetobacter soli and Klebsiella variicola.The Basic Local Alignment Search Tools revealed the percentage similarity ranging from 86%-97.04%and their accession numbers.These bacteria indicated high levels of faecal contamination in the environment.In conclusion,bacteria were found in the milt of cultured catfish and are capable of being pathogenic to humans and may increase the vertical transfer to fry during breeding and rearing stage.Therefore,fish farmers should maintain a hygiene and serene environment during breeding and culturing of catfish. | Folalu Adekunle Awe Ayofe Mutalib Hammed Olamiwaye Akintade Adeboyejo Olusegun Olufemi Whenu Oluwatosin Modupe Olarinmoye Gabriel Olarinde Mekuleyi Jesuyon Joseph Hungbo Akanji Adeolu Akinyemi Olufunmilayo Adebimpe Olanloye | 2022 | Journal of Fisheries Science2022，4，2： | 0 |
| 4 | Haematological and Hepatic Responses of the African Catfish Clarias gariepinus to Sublethal Exposure of Industrial Effluents from Ologe Lagoon Environs,Lagos,Nigeria显示文摘The present study is on the haematological and hepatic responses of the African catfish fingerlings Clarias gariepinus to sublethal toxicity of industrial effluents(IE)from the environment of Ologe Lagoon,Lagos,Nigeria.The fish were cultured in five concentrations of industrial effluents:0%(control),5%,15%,25%,and 35%.Trials were carried out in triplicates for twelve(12)weeks.The culture system was a static renewable bioassay and was carried out in the fisheries laboratory of the Lagos State University,Ojo-Lagos.Weekly physico-chemical parameters:Temperature(°C),pH,conductivity(ppm)and dissolved oxygen(DO in mg/L)were measured in each treatment tank.Haematological parameters:packed cell volume(PCV),red blood cells(RBC),white blood cell(WBC),neutrophil and lymphocytes etc.,and hepatological alterations were measured after 12 weeks.The physico-chemical parameters showed that the pH ranged from 7.82±0.25~8.07±0.02.DO ranged from 1.92±0.66~4.43±1.24 mg/L.The conductivity values increased with increase in concentration of I.E.While the temperature difference remained insignificant with mean value range between 26.08±2.14~26.38±2.28.The DO showed significant differences at p<0.05.Though survival was 100%during the sublethal study,haematological results showed that C.gariepinus had PCV ranging from 13.0±1.7~27.7±0.6,RBC ranged from 4.7±0.6~9.1±0.1,and neutrophil ranged from 26.7±4.6~61.0±1.0 amongst others.The highest values of these parameters were obtained in the control and lowest at 35%.While the reverse effects were observed for WBC and lymphocytes,the liver shows normal liver cells in the control(0%),but at higher toxic levels,there were:vacoulation,destruction of the hepatic parenchyma,tissue becoming eosinophilic(i.e.tending towards Carcinogenicity)and severe disruption of the hepatic cord architecture.This study therefore shows that disposal of effluents into the aquatic environment affects the health of fishes by impairing normal hepatic functions and hindering vital physiological processes if exposure continues for a long period of time(sublethal effect). | Akintade O.Adeboyejo Edwin O.Clarke Ayofe M.Hammed Roseline O.Adaramoye | 2018 | Journal of Food Science and Engineering2018，8，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员