Record Details

Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?
Not Available
 
Creator Uttam Kumar Sarkar
Koushik Roy
Malay Naskar
Gunjan Karnatak
Mishal Puthiyottil
Snigdha Baks
Suman Kumari
Lianthuamluia Lianthuamluia
Basanta Kumar Das
 
Subject Vulnerability assessment
Climate change
Small indigenous fishes
Mesh size
Overfishing threat
 
Description Not Available
Minnows are the most ignored yet indispensable group of freshwater fishes in Asian inland waters.
The reproductive resilience of minnows facing climatic variability, using a wetland inhabiting
species Amblypharyngodon mola (Mola carplets) in lower Indo-Gangetic floodplains, was
validated. Results revealed that spawning decision in females (threshold gonadosomatic index 5 units) is neither cued by water temperature nor rainfall. They can maintain pre-spawning fitnes≥s
(condition factor 1.12–1.25 units) within a broad temperature (22–33 ◦C) and rainfall (0–800
mm) window by active feeding, thus no risk of skipped spawning decisions while facing future
climatic variabilities. Present breeding phenology (May-December) might have prolonged in the
recent decade, especially the tail-end, concomitant with increasingly hot and rainy monsoon
(May-August) and warmer post-monsoon months (September-December). Minnows are expected
to prosper in a future climatic scenario, contributing to ecosystem balance (algal grazers) and
regional food security. Female first maturity (♀ puberty) was encountered at 4.7–5.1 cm total
length, hinting at a probable increase in the recent decade. Climate-favored prolonged recruitment
window, in absence of extreme fishing pressure (currently), might have led to such pattern.
However, this state might be temporary and labile. Minnows may soon get altered to earlier
puberty (=warning sign of stock collapse) if fishing pressure intensifies under a reproductively
favoring climate progression. Threshold body girth for spawning females was estimated at
3.2–3.4 cm ( + 17% than non-breeding ones). Fishing nets having mesh sizes (=total circumference)
at least > 32–34 mm will most likely be the key to minnows’ endurance or survival in the
coming decades.
Not Available
 
Date 2021-08-11T06:29:57Z
2021-08-11T06:29:57Z
2021-05-18
 
Type Research Paper
 
Identifier Sarkar, U. K., Roy, K., Naskar, M., Karnatak, G., Puthiyottil, M., Baksi, S., ... & Das, B. K. (2021). Assessing vulnerability of freshwater minnows in the Gangetic floodplains of India for conservation and management: Anthropogenic or climatic change risk?. Climate Risk Management, 33, 100325.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/54637
 
Language English
 
Relation Not Available;
 
Publisher Elsevier