Effects of toxic cyanobacteria and ammonia on flesh quality of blunt snout bream (Megalobrama amblycephala).
BACKGROUND
Toxic cyanobacterial blooms result in the production of an organic biomass containing cyanotoxins (e.g. microcystins) and an elevated ammonia concentration in the water environment. The ingestion of toxic cyanobacteria and exposure to ammonia are grave hazards for fish. The present study assessed the effects of dietary toxic cyanobacteria and ammonia exposure on the flesh quality of blunt snout bream (Megalobrama amblycephala).


RESULTS
Dietary toxic cyanobacteria and ammonia exposure had no impact on fish growth performance, fillet proximate composition and drip loss, whereas it significantly decreased fillet total amino acids, total essential amino acids, hardness and gumminess, and increased fillet ultimate pH as well as malondialdehyde content. However, there was no significant interaction between dietary toxic cyanobacteria and ammonia exposure on these parameters. Additionally, dietary toxic cyanobacteria significantly increased fillet initial pH, thaw loss and protein carbonyl content, whereas ammonia exposure did not.


CONCLUSIONS
The results of the present study indicate that dietary toxic cyanobacteria and ammonia exposure reduced the quality of blunt snout bream fillet. © 2016 Society of Chemical Industry.
College of Fisheries, Huazhong Agricultural University, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, 430070, China.
Li
L
Wang
College of Fisheries, Huazhong Agricultural University, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, 430070, China.
Chuanyue
C
Chen
College of Fisheries, Huazhong Agricultural University, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, 430070, China.
Wanjing
W
Liu
Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Key Laboratory of Health Aquaculture and Product Processing in Dongting Lake Area of Hunan Province, Hunan University of Arts and Science, Hunan, Changde, 415000, China.
Hu
H
Xia
College of Fisheries, Huazhong Agricultural University, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, 430070, China.
Jian
J
Li
College of Fisheries, Huazhong Agricultural University, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, 430070, China.
Xuezhen
X
Zhang
D000596:Amino Acids / Q000378:metabolism; D000641:Ammonia / Q000009:adverse effects / Q000494:pharmacology*; D000821:Animal Feed / Q000009:adverse effects; D000818:Animals; D000458:Cyanobacteria / Q000378:metabolism; D003530:Cyprinidae / Q000254:growth & development / Q000378:metabolism*; D004032:Diet; D004044:Dietary Proteins / Q000032:analysis; D017753:Ecosystem; D029941:Fish Proteins / Q000378:metabolism*; D005615:Freezing; D006244:Hardness; D006863:Hydrogen-Ion Concentration; D008315:Malondialdehyde / Q000378:metabolism; D052998:Microcystins / Q000494:pharmacology / Q000633:toxicity; D009124:Muscle Proteins / Q000378:metabolism; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism; D050050:Protein Carbonylation; D017747:Seafood / Q000032:analysis*; D014867:Water / Q000737:chemistry*
D000596:Amino Acids; D004044:Dietary Proteins; D029941:Fish Proteins; D052998:Microcystins; D009124:Muscle Proteins; D014867:Water; D008315:Malondialdehyde; D000641:Ammonia
Megalobrama amblycephala; ammonia; cyanobacterial blooms; flesh quality; microcystins