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Stimulation of ovarian growth by methyl farnesoate and eyestalk ablation in penaecoidean model shrimp, Sicyoniaingentis Burkenroad

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Title Stimulation of ovarian growth by methyl farnesoate and eyestalk ablation in penaecoidean model shrimp, Sicyoniaingentis Burkenroad
Not Available
 
Creator C.P. Balasubramanian
Fierro.I.J
Tsukimura. B.
 
Subject Shrimp Aquaculture
Methyl Farneso ate
Eyestalk Ablation
Sicyonia Ingentis
 
Description Not Available
The effect of methyl farnesoate (MF) administration on
the vitellogenesis of the penaeoidean shrimp, Sicyonia
ingentis, was studied. The short- and long-term treat ment e¡ects as well as the e¡ect of two MF injection re gimens (0.1 and 1.0 mg MF/injection) were evaluated.
The studies were also carried out to understand the pat tern of vitellogenesis in eyestalk ablated adult and juve nile shrimps. Acombination of endpoints, haemolymph
vitellogenin (Vg) levels, gonadosomatic index (GSI) and
histology, was used to study the e¡ect of these treat ments. The GSI increased in all the MF-treated shrimp
compared with the control shrimps. Although haemo lymphVg levels declined over the experimental period
in all the treatments, the Vg levels decreased signi¢-
cantly only in the short-term treatment with1.0 mg MF.
Similarly, haemolymph protein level also declined over
the experimental period in all the treatment groups.
However, except in the long-term treatment with
0.1 mg MF, all treatments showed a signi¢cant decrease
in haemolymph protein level. Conversely, in all eyestalk
ablated adults and juveniles, haemolymphVg, total pro tein and GSI increased over the experimental period, all
of which were higher than the concurrent control. The
discrepancy in the vitellogenic pattern between MF treated and eyestalk ablated shrimp was possibly due
to the di¡erence in the ovarian phase of the initial con trol. Although unilateral eyestalk ablation failed to in duce vitellogenesis in juveniles, bilateral ablation
induced vitellogenesis, which indicates that juveniles
are competent to undergo vitellogenesis.
Not Available
 
Date 2023-08-01T09:30:24Z
2023-08-01T09:30:24Z
2010-01-01
 
Type Journal
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/80381
 
Language English
 
Relation Not Available;
 
Publisher Not Available