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 |
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Creator |
C.P. Balasubramanian
Fierro.I.J Tsukimura. B. |
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Subject |
Shrimp Aquaculture
Methyl Farneso ate Eyestalk Ablation Sicyonia Ingentis |
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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 |
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Date |
2023-08-01T09:30:24Z
2023-08-01T09:30:24Z 2010-01-01 |
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Type |
Journal
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/80381 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Not Available
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