Comparative performance of growth, vertebral structure and muscle composition in diploid and triploid Paralichthys olivaceus

• Published in: Journal of Fish Diseases
• Main Authors: Liu, Hui, Wu, Zhihao, Zhu, Xiangping, Song, Zongcheng, Hu, Jinwei, Wang, Lijuan, Li, Jun, You, Feng
• Format: Report
• Language: English
• Published: WILEY 2018
• Subjects: diploid and triploid; growth trait; muscle composition; olive flounder Paralichthys olivaceus; vertebral structure; Fisheries; Marine & Freshwater Biology; Veterinary Sciences; SALMON SALMO-SALAR; COD GADUS-MORHUA; TENCH TINCA-TINCA; BASS DICENTRARCHUS-LABRAX; FATTY-ACID-COMPOSITION; ATLANTIC SALMON; GONADAL DEVELOPMENT; SEA BASS; SCOPHTHALMUS-MAXIMUS; DIETARY PHOSPHORUS; Atlantic salmon; Gadus morhua; Salmo salar; Scophthalmus maximus
• Online Access: http://ir.qdio.ac.cn/handle/337002/160185; https://doi.org/10.1111/jfd.12846

Growth, skeletal structure and muscle composition of cold-shock-induced triploid olive flounder Paralichthys olivaceus were investigated. The average values of total length and total weight of triploids were higher than those of diploids from 5 to 11months posthatch (mph). The growth difference disappeared after 11mph. The skeletal structure of flounder at 11mph was observed by X-ray imaging method. There are four kinds of vertebral deformity including vertebrae fusion, one-sided compression, two-sided compression and vertically shifted. The trunk region (V8-18) and tailing end of the vertebral column were the predominant locations of deformity. In general, the frequencies of vertebral deformities in triploids (60.0%) were higher than those in diploids (33.3%, p<0.05). Both the number of fish with deformed vertebrae and the average frequencies of deformed vertebrae in triploids were significantly higher than those in diploids (p<0.05). The muscle tissues of diploid and triploid flounder at 11mph contain the same types of fatty acid and free amino acid profiles. The number of fatty acids with significant higher contents in diploids and triploids was one and ten, respectively (p<0.05). The contents of free amino acids showed no difference between triploid and diploid fish.