A STUDY ON THE NON INFECTIOUS DISORDERS ASSOCIATED WITH INDIAN MAJOR CARP AQUACULTURE IN ANDHRA PRADESH
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Date
2013-02
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SRI VENKATESWARA VETERINARY UNIVERSITY, TIRUPATI - 517 502, Andhra Pradesh
Abstract
ABSTRACT :
Research work has been carried out on the topic “A Study On The Non Infectious
Disorders Associated With Indian Major Carp Aquaculture In Andhra Pradesh” to
develop better management practices. The specific objectives are to study the relationship
between Indian Major Carp farming practices and non-infectious disease status of
growing fish from commercial fish culture ponds which can lead to production losses.
Kolleru region located in Krishna Godavari zone and SPSR Nellore district are
the two significant freshwater fish culture areas and were selected to study the impact of
Non Infectious Disorders from commercial Indian Major Carp culture ponds.
The samples (Labeo rohita and Catla catla) collected from four places in Kolleru
area and four places in Nellore area covering farmer’s ponds and commercial fish seed
trader’s ponds. The sampled fish were examined grossly for their morphological
abnormalities and those fish with notable morphological deformities were
photographed in the field and preserved in 15% neutral buffered formalin. Fish
suspected to have skeletal abnormalities were placed in ice and taken to laboratory for
radiographic records. X-rays were taken and skeletal abnormalities were evident in all
those fish that were suspected. Out of total pond harvested fish biomass of nearly 44 tons,
0.086% showed the deformities. Of these, 5.6% had semi-operculum, 84.21% had spinal
deformity, 2. 63% had fin deformity, 2.63% had mouth hyperplasia and 7.89% had stump
body. Growth of deformed fish was substantially slower than that of the normal fish
under the same management conditions. The study was carried out based on the
evidences that the physical deformities in fish have been associated with exposure to
physical, chemical and environmental variables. But the factors for the analysis could not
provide any significant difference for the deformation in fish in either of the locations
viz. Kolleru region and Nellore region. The reason for deformities could not be
determined, but possible causes were discussed.
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Keywords
CARP; non-infectious disease