production of Climbing perch (Anabas
through Natural and Induced breeding
Dipanjan Kashyap1 and B. Kalita2
Institute of Fisheries Education (CIFE), 7 Bungalows, Versova,
Fisheries, AAU, Raha, Nagaon, Assam-782103.
Email of corresponding
Climbing perch (Anabas testudineus), which is popularly
known as Koi in most parts of India is a highly demanded fish. It
is an important air breathing fish, which can be considered for
culture in the areas with low dissolved oxygen. It is a larvivorous
feeder in habit. It is also popular for their lean meat, which
contain easily digestible protein and fat of very low melting point
and many essential amino acids making them ideal food. So, anabas
enjoys a good market demand in India particularly in the north-east
India there are two species of anabas available i.e. A.
testudineus and A. oligolepis. The fish having less deep
body, lower pectoral and shorter snout is A. oligolepis with
46 chromosomes numbers and the fish with more deep body, shorter
pectorals and longer snout is A. testudineus with 48
chromosomes numbers. Now anabas is a threatened species due to over
exploitation and conservation measure is very much needed. Induce
mass breeding and culture of this species may be ensuring to sum the
fish in nature. This fish has a tendency to walk away from the pond
during rains. Above all, the main constraints of culture of this fish
are non availability of seed from natural resources as well as
artificial propagation. So it is essential to develop some of the
standard breeding methods to overcome the cultural constraints.
system of Climbing perch:
can be cultured singly or in combination with magur (Clarious
batrachus) and singhi (H. fossilis). It can also be grown
in combination with carp fingerlings of over 10 cm sizes. This
practice can be employed in order to utilize the insect fauna as well
as in respect of the role of fish as a biological check on small
insects in water.
scientists have made several attempts for artificial breeding of
anabas with varying degrees of success. Bangladesh has succeeded in
developing the technology for artificial breeding under controlled
conditions. However partial success has been made in India and yet to
be standardized the technology. A brief description of breeding
behavior has been discussed here.
adults of A. testudineus are solitary and aggressive. It can
gain weight up to 52gm in one year. Maturity occurs at the age of one
when the fishes reach a size of 10-12cm in total length. The sexual
dimorphism in A. testudineus is more apparent during breeding
season. The mature male acquires a reddish hue on the body,
particularly on the pectoral and ventral fins. The female shows only
a faint reddish color. Further in the male a distinct diamond shaped
black spot appears in the caudal peduncle. In the female this black
spot is oblong and somewhat diffused. Moreover, the female is
contrast to the male, has a prominently bulging abdomen. The ventral
distance between the bases of the two pectoral fins in the female is
significantly greater than the male. In the breeding season, the
female exhibits a prominent bulge at the vent, resembling the genital
papillae while in the male this structure is absent. Mature male
oozed out white milt and mature female oozed out ova even at a gentle
pressure at the abdomen during breeding season.
nature the eggs are scattered in open water at the onset of the rains
without any nest. The male wraps itself in the female body,
fertilizing the eggs as they are laid. Each time 200 colorless eggs
are released until about 5000 numbers are laid. The fecundity varies
from 5000-35000 numbers. The eggs rise to the surface and float. The
eggs hatch in 24 hrs and the fry are about 2-3 mm long. They are free
swimming within two days of hatching.
case of artificial breeding with pituitary or synthetic hormone, a
single dose of injection for both the male and female spawning
actively and courtship behavior starts after 6 hrs of injection. The
water temperature to be maintained at 280 C + 10C.
Fertilized eggs float in the surface of water. It takes 18-19 hrs for
hatching after spawning and newly hatches larvae measures 1.9-2.0 mm
in length without any movement. Yolk sac completely absorbs on third
day after hatching and settles at the bottom. Egg custard, plankton
and Artemia are supplied as artificial feed for those fries up to
20-25 days. The survivability varies from 70-75%.
U. K., Deepak, P. K., Kapoor, D., Negi, R. S., Paul, S. K. and
Sreeprakash Singh (2005).
Captive breeding of climbing perch Anabas
testudineus (Bloch, 1792) with Wova-FH for conservation and
aquaculture. In Aquaculture Research. Vol.
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