Body shape changes during the early development of the Beluga (Huso huso)

Reza Asgari, soheil Eagderi, Gholamreza Rafiee, Hadi Poorbagher, Naser Agh, Hamid Eshagh Zadeh


Early body shape changes of beluga sturgeon were studied using landmark-based geometric morphometric approach to recognize its allometric growth pattern. Sampling was done from hatching up to 50 days post hatching (DPH). Left side of specimens were photographed using digital camera and nine landmark points were digitized on two-dimensional images. Total length (TI) was measured using the software ImageJ. To study of the body shape changes during early development, the mean procrustes distance between all specimens of same age, for all age groups, was calculated. The scores of relative warp analysis (RW) were used as descriptors for the variation in shape. RW analysis revealed a sharp body shape change during early ontogeny on 18 DPH. Growth trajectory was computed by plotting RW against TL. The inflection point of body shape corresponds to a TL of 23.3 mm (18 DPH). Results showed that ontogenetic shape changes encompassed a pre-inflection shape changes, which included the elongation of the head and tail regions i.e. positive allometric growth pattern and post-inflection shape changes, with a nearly isometric growth pattern.


Acipenseridae; Body shape; Ontogeny; Morphometrics

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Asgari, R. (2012). Early development of Huso huso (Acipenseridae): a case study for ontogeny of feeding apparatus and digestive enzyme (trypsin, amylase and lipase) activity up to 50 DPH. PhD. thesis, Department of Fisheries, University of Tehran. 170 p.

Bookstein, F. L. (1991). Morphometric tools for landmark data. Geometry and biology. Cambridge: Cambridge University Press.

Fuiman, L. A. (1983). Growth gradients in fish larvae. Journal of Fish Biology, 23: 117-123.

Gibb, A. C., B. O. Swanson., H. Wesp., C. Landels., and C. Liu (2006). Development of the escape response in teleost fishes: do ontogenetic changes enable improved performance? Physiological and Biochemicalal Zoology, 79: 7-19.

Gisbert, E. (1999). Early development and allometric growth patterns in Siberian sturgeon and their ecological significance. Journal of Fish Biology, 54: 852–862.

Gisbert, E., G. Merino., J. B. Muguet., D. Bush., R. H. Piedrahita and D. E. Conklin (2002). Morphological development and allometric growth patterns in hatchery-reared California halibut larvae. Journal of Fish Biology, 61: 1217-1229.

Hale, M. E. (1999). Locomotor mechanics during early life history: effects of size and ontogeny on faststart performance of salmonid fishes. Journal of Experimental Biology, 202: 1465–1479.

Omori, M., Y. Sugawara and H. Honda (1996). Morphogenesis in hatchery-reared larvae of the black rockfish, Sebastes schleeli, and its relationship to the development of swimming and feeding actions. Ichthyological Research, 43: 267-282.

Osse, J. W. M. (1990). Form changes in fish larvae in relation to changing demands of function. Netherlands Journal of Zoology, 40: 362-385.

Osse, J. W. M. and J. G. M. van den Boogaart (1995). Fish larvae, development, allometric growth, and the aquatic environment. ICES Marine Science Symposium 201: 21-34.

Osse, J. W. M., J. G. M. van den Boogaart., G. M. J. van Snik., and L. van der Sluys (1997). Priorities during early growth of fish larvae. Aquaculture, 155: 249-258.

Rohlf, F. J. (1993). Relative warp analysis and an example of its application to mosquito wings. In: Marcus, L. F., E. Bello and A. García-Valdecasas (Ed.). Contributions to morphometrics. Mardrid: C.S.I.C, Pp.131-159.

Rohlf, F. J. (1998). On applications of geometric morphometrics to studies of ontogeny and phylogeny. Systematic Biology, 47: 147-158.

Rohlf, F. J. (2005). Software by F. James Rohlf. Available from:

Russo, T., C. Costa and S. Cataudella (2007). Correspondence between shape and feeding habit changes throughout ontogeny of gilthead sea bream Sparus aurata L., 1758. Journal of Fish Biology, 71: 629–656.

Simonovic, P. D., P. Garner., E. A. Eastwood., V. Kovac and G. H. Copp (1999). Correspondence between ontogenic shifts in morphology and habitat use in minnow Phoxinus phoxinus. Environmental Biology of Fishes, 56: 117–128.

Van Snik, G. M. J., J. G. M. Van Den Boogaart and J. W. M. Osse (1997). Larval growth patterns in Cyprinus carpio and Clarias gariepinus with attention to the finfold. Journal of Fish Biology, 50: 1339-1352.

Zelditch, M. L., D. L. Swiderski., H. D. Sheets and W. L. Fink (2004). Geometric Morphometrics for biologists: A primer. Elsevier (USA).


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