Study of allometric growth pattern in the Caspian roach during early development ( upto 80 D pH)

At hatching most functional system of fish are incomplete and morphogenesis arevery intense during early development showing the growth of organs to ensuresurvival. Understanding of this changes is necessary for an aquacultural management.Hence, this research was conducted to study the allometric growth patterns ofCaspian roach (Rutilus rutilus caspicus), during early development up to hatchinguntil 80 day post hatching (DPH). Hence, morphometric parameters obtained from2D pictures of specimens using the ImageJ software and allometric growth patternwas calculated as a power function of total length using non-transformed data: Y=ax b.The results revealed that during early development, the allometric growth pattern ofsnout, head, tail, trunk, body depth and eye 80 days of live fish were divided into fourstages according to the balloon 1975 staging. The first stage consists of phaseseleuthero-embryo and Propterygio-larva and the second stage consists of phasesPterygio-larval and Juvenile that the phase Eleuthero-embryo to Juvenile head andtail growth pattern was positive allometric related to the acquisition of the ability toswim and active respiration and nutrition these results are consistent with the growthpattern of the essential requirements to be approved.

Keywords:

Allometry , Growth pattern , Caspian roach