NDLI: Effect of aromatase inhibitors on the ovarian development of stunted yearlings of rohu (Labeo rohita): a preliminary study

Content Provider	Springer Nature Link
Author	Charan, Ravi Suresh Babu, Padinhate Purayil Venugopal, Gundaboena Chadha, Narinder Kumar Sreeramamurty, Kommula Bhaskara
Copyright Year	2013
Abstract	In India, many of the fish farmers stock 1-year-old stunted fishes (stunted yearlings) of Indian major carps (IMC) for enhancing fish production through compensatory growth, but many of them observed problems of early maturation in these fishes. Application of aromatase inhibitors for deceleration of ovarian maturation is one of the probable solutions to mitigate this issue. In the present study, a synthetic aromatase inhibitor letrozole [25 (L25) and 50 (L50) mg kg−1 feed] and a plant-derived aromatase inhibitor, grape seed extract [100 (G100) and 200 (G200) mg kg−1 feed], were fed to stunted yearlings of rohu (Labeo rohita) for 45 days well before the onset of breeding season. Maturation indices such as gonadosomatic index (GSI) and serum oestradiol (E) levels indicated a dose-dependent inhibition of ovarian development in the aromatase-inhibitor-treated fish. Higher dose of letrozole (GSI, 15.12 ± 0.18; E, 3.19 ± 0.42) and grape seed extract (GSI, 16.90 ± 0.40; E, 3.60 ± 0.75) were found to be more effective since control fish showed further advancement in maturation (GSI, 21.20 ± 1.10; E, 7.33 ± 0.74) during the peak breeding season (15th June). Histological observations also confirmed the results revealing a delayed initiation of ovarian development in the case of higher doses of letrozole and grape seed extracts. These results indicate the possible use of aromatase inhibitors in arresting the early maturation process in IMC.
Starting Page	689
Ending Page	697
Page Count	9
File Format	PDF
ISSN	09676120
Journal	Aquaculture International
Volume Number	22
Issue Number	2
e-ISSN	1573143X
Language	English
Publisher	Springer International Publishing
Publisher Date	2013-09-08
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Letrozole Grape seed extract Gonadosomatic index Maturation Rohu Stunted yearling Freshwater & Marine Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Agronomy and Crop Science

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