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Photo-thermal manipulations induce captive maturation and spawning in endangered golden mahseer (Tor putitora): A silver-lining in the strangled conservation efforts of decades

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Title Photo-thermal manipulations induce captive maturation and spawning in endangered golden mahseer (Tor putitora): A silver-lining in the strangled conservation efforts of decades
Not Available
 
Creator M.S. Akhtar
M. Rajesh
A. Ciji
P. Sharma
B.S. Kamalam
R.S.Patiyal
A.K. Singh
D. Sarma
 
Subject 17β-estradiol, 17α, 20β-diOH-progesterone, Gonado-somatic index, 11-ketotestosterone, Captive maturity, Spawning
 
Description Not Available
Present study was undertaken to explore the possibilities of inducing maturity and spawning of T. putitora under captivity through manipulation of environmental cues i.e. photoperiod and temperature. In experiment I, adult T. putitora were subjected to three photoperiod (8L:16D, 12L:12D and 16L:12D) regimes for 100 days. In females, darker photoperiod (8L:16D) significantly decreased the plasma estradiol levels compared to 12L:12D and 16L:8D photoperiods. Plasma 17α, 20β-diOH-P was significantly (p  .05) effect of temperature was observed on plasma levels of 11-KT of both sexes. Experiment III was meant to explore the possibility of achieving captive spawning by simulating natural spawning ground using a gravel bed bio-filter. Natural spawning occurred after four months of rearing in the simulated facility. Subsequently, fishes further spawned seven times in a period of 4 months on an interval of 15–20 days. Overall, our results suggested that captive maturity and spawning of golden mahseer can be achieved by manipulating the environmental cues. The results solved the prevailing decadal issue of captive maturation of golden mahseer which otherwise has been a major bottleneck for its wide spread rehabilitation and conservation programmes.
Indian Council of Agricultural Research (ICAR)
 
Date 2020-09-28T10:23:28Z
2020-09-28T10:23:28Z
2018-01-01
 
Type Research Paper
 
Identifier Akhtar, M.S., Rajesh, M., Ciji, A., Sharma, P.,Kamalam, B.S., Patiyal, R.S., Singh, A.K. and Sarma, D. (2018). Photo-thermal manipulations induce captive maturation and spawning in endangered golden mahseer (Tor putitora): A silver-lining in the strangled conservation efforts of decades. Aquaculture, 497, 336-347.
0044-8486
http://krishi.icar.gov.in/jspui/handle/123456789/41660
 
Language English
 
Relation Not Available;
 
Publisher Elsevier