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Induction of maturity and spontaneous spawning of captive broodstock of Bhetki, Lates calcarifer (Bloch) through hormonal manipulation.

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Title Induction of maturity and spontaneous spawning of captive broodstock of Bhetki, Lates calcarifer (Bloch) through hormonal manipulation.
Not Available
 
Creator M. Kailasam,
A.R. Thirunavukkarasu
P. Kishore Chandra
Shiranee Pereira
K.V. Rajendran
 
Subject Induction
Spontaneous Spawning
Captive Broodstock
Lates Calcarifer
Hormonal Manipulation
 
Description Not Available
Central lnstitute of Brackishwater Aquaculture (CIBA), Chennai for the first time in
India, has succeeded in the development of seed production technology for the priority
candidate species sea bass (Lates calcarifer). Captive land based broodstock.of Lates
calcarifer has been succes~fully developed. Broodstock of sea bass held in 100 tonne
capacity RCC tanks with proper water, health and feed management strategies could be
made to attain gravid condition through LHRH-a hormone treatment. Female fishes
weighing 6-1 Okg size were implanted with LHRH-a hormone pellet intramuscularly. Fishes
with average ova diameter d 346~-391 p were implanted with hormone pellet @ 1 0OPg/kg
body weight to accelerate the maturation. Within 45 days of implantation fishes attained
gravid condition with mean ova diameter of more than 450p suitable for induction of
spawning. However, fishes without hormone implantation with initial mean ova diameter
of 354p and 355p attained maturity only after 80 and 109 days respectively showing the
importance of hormone manipulation to accelerate and advance the maturity stages.
These fishes were induced to spawn through LHRH-a hormone injection @ 60-70pglkg
body weight for females and 30-35pg/kg body weight for males. Spawning was
spontaneous after 32-35 h of injection. Fertilization rate was from 40 to 80% with hatching
rate between 25-90%. The details are discussed.
Not Available
 
Date 2023-06-09T07:50:01Z
2023-06-09T07:50:01Z
1998-01-01
 
Type Journal
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/78179
 
Language English
 
Relation Not Available;
 
Publisher Not Available