Record Details

The Effect of Net Colour on the Catch Efficiency of Gillnets Operated in Vembanad Lake, Kerala, India

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title The Effect of Net Colour on the Catch Efficiency of Gillnets Operated in Vembanad Lake, Kerala, India
Not Available
 
Creator Salini Mohanan
Madhu, V. R.
Manoj Kumar, B.
 
Subject Vembanad lake
gill nets
colour
nMDS
Etroplus suratensis
 
Description Not Available
Gillnets are commonly used in inland lakes due to
their simplicity in construction and operation,
efficiency, and low energy usage. The Vembanad
lake is one of the most prominent lakes in Kerala,
contributing significantly to the small-scale and
artisanal fisheries, in which gillnets are the predominant
gear. There have been studies on the effect of
gillnet panel colour on the selective capture of fish
species, primarily in the open ocean and rivers.
Although a considerable number of studies exist on
the species profile and fish catching methods in the
lake, the efficiency of coloured webbing for gillnets
is not available. The efficiency of coloured webbing
for gillnets is not documented, which, if available,
would be a crucial input for implementing gearbased
technical measures for conservation in gillnets
in the lake. In this regard, a study was conducted
along Vembanad lake and the lower reaches of the
Muvattupuzha river to compare the catch efficiency
and species profile of transparent gillnets typically
employed in the region with gillnets fabricated
using blue and green coloured webbing. The results
demonstrated a considerable increase in CPUE for
green-coloured gillnets (708.9±12.8 grams per operation)
compared to blue and transparent gillnets,
which had CPUE values of 397.9±80.2 and 293.7±70.6
grams per operation, respectively. Significantly
higher catches of Horabagrus brachysoma and Etroplus
suratensis were obtained with the green-coloured
gillnets than with the control (Transparent). Lengthwise
data showed that green-coloured nets captured
larger individuals of E. suratensis, but significant
difference was not observed in other species. The number of E. suratensis captured in each gillnet
contributed to the most dissimilarity in all comparisons,
followed by Gerres sp. and H. brachysoma,
according to similarities percentage analysis conducted
to comprehend the species assemblage
structure. This is the first report on the effect of
gillnet colour on the catch efficiency of gillnets in
Vembanad lake, and the results, which indicate
species-specific differences in capture, will be one
of the many inputs necessary for implementing
gear-based technical measures in the gillnet fishery
in the lake.
Not Available
 
Date 2022-12-21T11:12:48Z
2022-12-21T11:12:48Z
2022-10
 
Type Research Paper
 
Identifier Salini Mohanan, Madhu, V. R. and Manoj Kumar, B. (2022) The Effect of Net Colour on the Catch Efficiency of Gillnets Operated in Vembanad Lake, Kerala, India. Fish. Techol. 59(4): 245-252.
0015-3001
http://krishi.icar.gov.in/jspui/handle/123456789/75236
 
Language English
 
Relation Not Available;
 
Publisher Society of Fishery Technologists India