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<p>Effects of GnRH-a on the ovarian maturation of blue tang fish (<em>Paracanthurus hepatus</em> Linnaeus, 1776)</p>

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Title Statement <p>Effects of GnRH-a on the ovarian maturation of blue tang fish (<em>Paracanthurus hepatus</em> Linnaeus, 1776)</p>
 
Added Entry - Uncontrolled Name Sang, H M ; Institute of Oceanography - Vietnam Vietnam Academy of Science and Technology
Lam, H S
Ky, P X
 
Uncontrolled Index Term Blue tang female, GnRH-a, Ovarian maturation, Plasma and ovarian steroids
 
Summary, etc. <p style="text-align: justify;">The effects of gonadotropin-releasing hormone – analogue (GnRH-a) injection on the ovarian maturation and steroid hormone level of blue tang (<em>Paracanthurus hepatus</em>) females were investigated. Pre-matured blue tang females were injected with GnRH-a at dosages of 150, 200 and 250 μg/kg body weight and were then observed for fluctuation of steroid hormone levels, including testosterone (T), estradiol (E2) and 17α,20β-dihydroxy-4-pregnen-3-one (DHP) in plasma and ovary after 2 and 7 days. Plasma T level was not significantly different among the treated groups at sampling times. However, the ovarian T levels in the fish injected with 200 and 250 μg/kg GnRH-a were higher than that of the non-administered GnRH-a and fish injected with 150 μg/kg after two days (<em>P</em> &lt; 0.05). After seven days of the administration, the ovarian T level was lowest in the fish without GnRH-a injection and highest in the fish injected with 250 μg/kg (<em>P </em>&lt; 0.05). The plasma and ovarian E2 levels were higher (<em>P</em> &lt; 0.05) in the fish injected with 200 and 250 μg/kg of GnRH-a than in the control fish after 2 and 7 days of injection. Both the plasma and ovarian DHP levels in GnRH-a injected fish were significantly (<em>P </em>&lt; 0.05) increased after day 2 and was highest in the fish injected with 250 μg/kg (<em>P</em> &lt; 0.05). After 7 days of injection, the plasma and ovarian DHP levels remained higher in the GnRH-a injected fish than in the controlled group (<em>P</em> &lt; 0.05). There was no difference in DHP levels among the GnRH-a-treated groups. The results indicate that the dosage of 200 µg/kg of GnRH-a is appropriate for inducing maturation of the blue tang fish.</p>
 
Publication, Distribution, Etc. Indian Journal of Geo-Marine Sciences (IJMS)
2022-09-01 01:02:26
 
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http://op.niscair.res.in/index.php/IJMS/article/view/39661
 
Data Source Entry Indian Journal of Geo-Marine Sciences (IJMS); ##issue.vol## 51, ##issue.no## 03 (2022)
 
Language Note en