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Effect of elevated water temperature and stress in chocolate mahseer (Neolissochilus hexagonolepsis): implication for habitat restoration and conservation.

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Title Effect of elevated water temperature and stress in chocolate mahseer (Neolissochilus hexagonolepsis): implication for habitat restoration and conservation.
Not Available
 
Creator S.K. Majhi, S.K. Das and D.J. Rajkhowa
 
Subject Climate, epigenetic gorges, fossil valleys, incision, tectonics
 
Description Not Available
Conventionally, epigenetic gorges in tectonically
active orogen are attributed to the bedrock geometry
and original valley configuration. Because they are
invariably associated with fossil valleys containing
appreciable sediment succession, it is argued that the
older river course was abandoned due to accelerated
sedimentation (landslides or widespread fluvial
aggradations) as a result of which rivers were forced
to occupy the new course (epigenetic gorge). Thus it
can be suggested that fossil valleys and gorges are the
outcome of the climate–tectonic interaction. The present
study is therefore undertaken in the monsoondominated and tectonically active inner Lesser Central Himalaya to understand the role of climate and
tectonics in their evolution. Preliminary observations
in three river valleys indicate that their locations (epigenetic gorges) are structurally controlled (independent of lithology). However, the abandonment of old
river course (fossil valleys) was caused due to the
accelerated sedimentation (climatically induced).
Chronology of the fill sediment indicates that old river
course abandonment occurred during the early Holocene climatic optimum (15–9 ka), whereas the incision
leading to the epigenetic gorge formation began after
9 ka.
Not Available
 
Date 2020-01-23T04:19:25Z
2020-01-23T04:19:25Z
2013-04-17
 
Type Article
 
Identifier S.K. Majhi, S.K. Das and D.J. Rajkhowa (2013) Effect of elevated water temperature and stress in chocolate mahseer (Neolissochilus hexagonolepsis): implication for habitat restoration and conservation. Current Science 105: 1-4.
ISSN 0011-3891
http://krishi.icar.gov.in/jspui/handle/123456789/31099
 
Language English
 
Relation Not Available;
 
Publisher Current Science Association