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

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Abstract

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.

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Iranian Scientific Fisheries Journal
Volume 21, Issue 2 - Serial Number 79
March and April 2013
Pages 1-9

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