A comparative study of alive and dead eleutheroembryo of Beluga (Huso huso) shape (5DPH) using geometric morphometric method

• Main Authors: Eshaghzadeh, H., Eagderi, S., Poorbagher, H., Kazemi, R.
• Format: Article in Journal/Newspaper
• Language: Persian
• Published: 2012
• Subjects: Biology; Fisheries; Beluga; Deformity; Geometric morphometrics; Huso huso; morphometric; method; Iran; Beluga*
• Online Access: http://hdl.handle.net/1834/36704

High mortality of beluga prelarvae (Huso huso) occurs in hatcheries and this appears to be linked to various abnormalities. Hence, this study was conducted to compare the body shape of alive and dead beluga prelarvae (5DPH) and to find the patterns of deformities among losses using geometric morphometric method. This method was applied to extract shape data as landmark’s Cartesian coordinates. Specimens were photographed using digital camera and the landmarks put on two-dimensional images using tpsDig2. Landmark data after GPA (Generalized Procrustes Analysis) analyzed using PCA and DFA. Results showed significant differences between alive and dead prelarvae shapes. In addition, various pattern of deformities found in the operculum, yolk sac and caudal peduncle parts. Future studies are suggested on larvae and juvenile stage.