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Aquaculture planning for suspended bivalve farming systems: The integration of physiological response of green mussel with environmental variability in site selection

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Title Aquaculture planning for suspended bivalve farming systems: The integration of
physiological response of green mussel with environmental variability in site
selection
Not Available
 
Creator Krishnakumar,P K
Sasikumar,Geetha
 
Subject aquaculture
bivalve farming
physiological response
green mussel
 
Description Not Available
Bivalve Condition Index (CI) is widely employed in environmental monitoring programmes as it integrates
physiological responses to stress with changes in somatic growth. Besides indicating, the commercial
quality of bivalve population it may be also be used to compare the relative health of animals in nearby
populations. In this study, CI of green mussels, Perna viridis was evaluated as the intrinsic response to the
variations in the environment in two potential mussel mariculture sites in the tropical monsoon region
with diverse remoteness to riverine outflow. Condition index of mussels from site with relatively higher
riverine influence (RI) was compared with mussels from area of reduced riverine (RR) influence along Kar-
nataka coast (Eastern Arabian Sea)The dominant patterns of spatial trends in 12 environmental variables
(temperature, salinity, pH, dissolved oxygen, rainfall, chlorophyll)-(chl-a)suspended particulate mat-
ter (SPM) particulate organic matter (POM)particulate inorganic matter (PIM)POM/SPM, chla/POM and
PIM%of the sites were resolved by Principal Component Analysis (PCA)The stepwise multiple regres-
sion analysis related the spatial variability in CI to variations in water temperature and organic content
of the seston (chlorophyll-and particulate organic matter)The discriminant analysis performed with
monthly mean water temperature, chl-levels and CI ratio high CI ratio (CIhigh) and low CI ratio (CIlow)
indicated that 83.9% of the CIhigh was associated with high chl-and high water temperature group
whereas, 72.4% of CIlow were associated with low chl-and low water temperature regime. The RR site
presented less variation in environmental parameters offering more conducive environment for the
growth of mussels, characterised by better CI with low seasonal variations. Whereas, in the site proxi-
mate to riverine discharge, reserves were alternatively channelled into energy-consuming processes and
hence unfavourable environmental conditions showed poor tissue condition due to utilization of energy
reserves which were potentially destined for growth. Thus, average CI, besides its representation of the
general health condition of the bivalves can potentially be used in selecting suitable sites for bivalve
mariculture in comparable hydrological environment.
Not Available
 
Date 2021-09-16T05:54:24Z
2021-09-16T05:54:24Z
2011
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/62728
 
Language English
 
Relation Not Available
 
Publisher Elsevier