METABOLIC EFFECTS OF EYESTALK ABLATION ON THE TOTAL PROTEIN AND LIPID OF THE PRAWN PENAEUS KERATHURUS (LEACH)

METABOLIC EFFECTS OF EYESTALK ABLATION ON
THE TOTAL PROTEIN AND LIPID OF THE PRAWN
PENAEUS KERATHURUS (LEACH).
N.F. ABD EL-HAMJD AND H.D. HASHEM.*
Institute of Oceanography and Fisheries. Alexandria. Egypt.
* Zoology Department, Faculty of Science. University of Alexandria, Egypt.
ABSTRACT.
Marked variation in moisture ~ontent could be
detected with di fferent length groups. Generally
prawns with il1ll1ature stages have higher water
percentage in their muscles than the mature ones.
After ablation, the percentage of water content is
greater than that of the unablated animal.
In bilateral ablation of the eye~talk of the prawn
Penaeus kerathurus (L), there was more lipid than
protein in the ovary after 30 days postoperation.
The general decline in the total ovarian protein
of ablated animals m1ght be’ attributed to Its
utilization on yolk fo~tion. The indadequate
availabil1ty of protein fol1owing the ablat10n aff-2cts._~.. _._., __~.,_
the tnteraovar1an synthes1s.
The remarkable postoperative augmentatton of total
ovarian lipids, which are encountered by an almost
equivalent drop in hepatopancreatic lipids, may lead
to a certa1n mode of transfer of the hepatopancreatfc
llp1ds to the ovary, during the period of accelerated
vttellogenests following eyestalk removal.