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Pattern of reproductive biology of the endangered golden mahseer Tor putitora (Hamilton 1822) with special reference to regional climate change implications on breeding phenology from lesser Himalayan region, India

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Title Pattern of reproductive biology of the endangered golden mahseer Tor putitora (Hamilton 1822) with special reference to regional climate change implications on breeding phenology from lesser Himalayan region, India
Not Available
 
Creator Kripal Datt Joshi,
Shyamal Chandra Shukla Das
Ravindra Kumar Pathak
Amanullah Khan
Uttam Kumar Sarkar
Koushik Roy
 
Subject Tor putitora
reproductive biology
breeding phenology
climate change
lesser Himalayas
Uttarakhand
 
Description Not Available
Mahseer is an important group of endemic game fish found in the Indian subcontinent inhabiting in
streams, riverine pools and lakes. Besides commercial fishery, it also forms lucrative sport fishery in the
Himalayan rivers. Samples of golden mahseer (Tor putitora) were collected from the river Kosi at
Ramnagar area (lesser Himalayan region) of Uttarakhand, India during 2014–2016 to study reproductive
biology and trace any changes in breeding phenology from earlier records. The observed breeding
season was from July till September. In males (310–565 mm, 355–1750 g) and females (315–580 mm,
260–2500 g), GSI values surged from late June to early July and peaked in August. Absolute and
relative fecundity ranged from 4217 to 8365 and from 3667 to 7348 per kg, respectively. The maximum
water temperature was usually recorded in May (30.5°C) and minimum (18.4°C) in January. Sex ratio
was estimated at 1:1.25 with χ2 value of 3.20 and the difference was non-significant. The breeding
phenology of golden mahseer may likely have gone through two distinct steps of transformation viz.
shifting-prolongation (1911–1981) and reduction-stabilization (1981–present). Even after a probable
reduction in duration of breeding season and shift (delay) in onset of breeding in Golden mahseer
population of lesser Himalayan region during 1911–1981, some stabilization in breeding phenology
appears to have been attained since 2000s. It is predicted that the species appears to be continuously
adapting to changing climate in lesser Himalayas.
ICAR NICRA
 
Date 2021-08-10T09:16:12Z
2021-08-10T09:16:12Z
2018-07-01
 
Type Research Paper
 
Identifier Joshi, K.D., Das, S.C. S., Pathak .R.K., Khan.A., Sarkar, U.K and Roy. K. 2018. Pattern of reproductive biology of endangered Golden mahseer Tor putitora(Hamilton, 1822) with special reference to regional climate change implication on breeding phenology from lesser Himalayan region, India. Journal of Applied Animal Research. 46(1): 1289–1295
0971-2119
http://krishi.icar.gov.in/jspui/handle/123456789/54222
 
Language English
 
Relation Not Available;
 
Publisher Taylor & Francis Group