Doctoral dissertation of aquaculture: Effects of nitrite, temperature and hypercapnia on physiological processes and growth in clown knifefish (Chitala ornata, Gray 1831)

The objectives of dissertation: The objectives of this dissertation were to investigate the effects of nitrite, high concentrations of carbon dioxide and elevated temperatures to physiological parameters and growth of the air-breathing C. ornata during sub-lethal and chronic exposures of these factors in isolation and combination in order to provide a better physiological understanding, particularly recommendations and solutions for minimizing impacts of nitrite toxicity and its combination with other environmental elements in aquaculture ponds under global climate change
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Doctoral dissertation of aquaculture: Effects of nitrite, temperature and hypercapnia on physiological processes and growth in clown knifefish (Chitala ornata, Gray 1831) MINISTRY OF EDUCATION AND TRAINING CAN THO UNIVERSITY LE THI HONG GAMEFFECTS OF NITRITE, TEMPERATURE AND HYPERCAPNIA ON PHYSIOLOGICAL PROCESSES AND GROWTH IN CLOWN KNIFEFISH (Chitala ornata, Gray 1831) DOCTORAL DISSERTATION OF AQUACULTURE Can Tho, 2018 MINISTRY OF EDUCATION AND TRAINING CAN THO UNIVERSITY LE THI HONG GAMEFFECTS OF NITRITE, TEMPERATURE AND HYPERCAPNIA ON PHYSIOLOGICAL PROCESSES AND GROWTH IN CLOWN KNIFEFISH (Chitala ornata, Gray 1831) Major: Aquaculture Major code: 9 62 03 01 DOCTORAL DISSERTATION OF AQUACULTURE Supervisor Prof. Dr. NGUYEN THANH PHUONG Can Tho, 2018 Data sheetTitle: Effects of nitrite, temperature and hypercapnia on physiological processes and growth in clown knifefish (Chitala ornata, Gray 1831)Subtitle: PhD DissertationAuthor: Le Thi Hong Gam, PhD student code: P0613005 Major: Aquaculture, Major code: 9 62 62 03 01Affiliation: Department of Nutrition and Aquatic Products Processing, College of Aquaculture and Fisheries, Can Tho University, VietnamPublication year 2018Cited as: Le Thi Hong Gam, 2018. Effects of nitrite, temperature and hypercapnia on physiological processes and growth in clown knifefish (Chitala ornata, Gray 1831). Doctoral Dissertation. College of Aquaculture and Fisheries, Can Tho University, Vietnam.Keywords: Climate change, air-breathing fish, clown knifefish, nitrite, temperature, hypercapnia, methaemoglobin reductase activity, acid-base balance, ion exchangeSupervisors: Prof. Dr. Nguyen Thanh Phuong, College of Aquaculture and Fisheries, Can Tho University, Viet Nam. Assoc. Prof. Dr. Mark Bayley, Zoophysiology, Department of Bioscience, Aarhus University, Denmark. Assoc. Prof. Dr. Do Thi Thanh Huong, Department of Nutrition and Aquatic Products Processing, College of Aquaculture and Fisheries, Can Tho University, Viet Nam. Assoc. Prof. Dr. Frank Bo Jensen, Department of Biology, University of Southern Denmark, Odense, Denmark. i Result commitmentI commit that this dissertation was investigated based on all the results of my study. Allshowed data and results in the dissertation were honest and have never been publishedbefore. The iAQUA project can completely use these data and results. Can Tho, 18th Nov, 2018 ii AcknowledgementsForemost, my sincere thanks go to my principal supervisors Nguyen ThanhPhuong and Do Thi Thanh Huong, who have given me the opportunity ofstudying, enthusiastic guidances and detailed revisions for my thesis as well aspositive encouragements in any situation throughout my academic researchprocess. I would also like to express my deep gratitude to Mark Bayley, who hassupported, inspired, built my passion in doing researches, also revised themanuscripts and shared the life experiences for me being more mature. My deepthanks also give to Frank Bo Jensen, who has taught me the techniques related tomy main research about nitrite toxicity and helped me in manuscript revisions aswell as showed me Odense city in my trip to Denmark. The invaluable supportsfrom all of them from the first day I stepped into the iAQUA project have broughtto what I have today.Also, I would like to give my thanks to Tobias Wang, the staff and students inZoophysiology Section, Department of Bioscience, Aarhus University for mystays in Denmark. I sincerely thank for the positive supports from ChristianDamsgaard, who showed me the knowledge related to acid-base regulation. Mythanks also go to Roy, John, Elin and Louise for showing Aarhus city and invitingme to their home.My great thanks give to the staff and students in Department of Nutrition andAquatic Products Processing, where my project was investigated. I greatly thankto Nguyen Quoc Thinh, Le Thi Minh Thuy and Tran Minh Phu, who shared metheir experiences about studying PhD, writing and publishing the articles.I would like to give my thanks to my fellow friends in iAQUA project: NguyenThi Kim Ha, Le My Phuong, Phan Vinh Thinh, and D ...