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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
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.
The financial help of ICAR-CRIDA for funding in the project National Innovations in Climate Resilient Agriculture (NICRA) is also gratefully acknowledged.
 
Date 2021-10-30T05:47:20Z
2021-10-30T05:47:20Z
2018-07-18
 
Type Research Paper
 
Identifier Kripal Datt Joshi, Shyamal Chandra Shukla Das, Ravindra Kumar Pathak,Amanullah Khan, Uttam Kumar Sarkar & Koushik Roy (2018) Pattern of reproductive biology of theendangered golden mahseer Tor�putitora (Hamilton 1822) with special reference to regional climatechange implications on breeding phenology from lesser Himalayan region, India, Journal of Applied Animal Research, 46:1, 1289-1295
0971-2119 (Print)
0974-1844 (Online)
http://krishi.icar.gov.in/jspui/handle/123456789/66618
 
Language English
 
Relation Not Available;
 
Publisher Taylor & Francis