Comparison of breeding performance of different strains of Tilapia used in the hatcheries in Bangladesh
Abstract
ABSTRACT
The research was carried out in Hi Tech Tilapia Hatchery at Dagonbhuiya of Feni district and
Green Field Hatchery of Laxmipur district to determine the breeding performance of three
different strains of tilapia such as BFRI strain, Local strain and Philippine strain those are under
aquaculture practice in Bangladesh. The study was carried out to address the specific objectives
such as determination of fecundity, percentage of egg bearing female, hatching rate of egg and
survival rate of hatchlings. The experiment consisted of three treatments viz., T1, T2, and T3.
The treatments were randomly assigned with three replications viz., R1, R2 and R3. BFRI strain
was stocked in treatment T1, the local strain in treatment T2 and the Philippine strain in
treatment T3. Each replication has one hapa and stocked with 300 male and 100 female, so
altogether 9 hapa were set up with different strains of tilapia. All female from each of the hapa
were checked fortnightly for collecting eggs and 30 male and 30 female were collected for
counting the total length and total weight. After collection, eggs were transferred to the hatchery
and separated as three grades, grade-I-pale yellow color, grade-II-deep yellow color and gradeIII-radish
color
eggs.
During
collection,
the
eggs
of
10
females
were
separated
in
10
trays
and
transferred
to
the
hatchery
for
determination
of
fecundity
through
counting
1g
eggs
and
total
weight
of
eggs
of
each
female.
The
mean
value
of
the
fecundity
(the
rate
of
the
production
of
egg
at
an
average)
per
fish
with
minimum
and
maximum
were
found
in
BFRI
strain
as
601.64
(222.56,
865.17), local strain as 663.20 (114.36, 927.94) and 372.30 (127.06, 554.48) in
Philippine strain. The mean no. of egg bearing female percentage with minimum and maximum
value were 27.44 (19.33, 41.89) in BFRI strain, 20.26 (8.00, 31.67) in local strain and 10.07
(5.67, 13.33) in Philippine strain. The hatching rate of three strain with minimum and maximum
was 63.10 (38.18, 88.95) in BFRI strain, 64.56 (49.38, 82.63) in local strain and 45.28 (23.18,
87.58) in Philippine strain. The mean result obtained in survival rate in percentage of three
strains of tilapia larval development stages with minimum and maximum were 80.10% (67.45,
87.18) in BFRI strain, 51.79% (16.38, 77.51) in local strain and 72.45% (49.68, 91.46) in
Philippine strain. Fecundity 937.94 high in local strain where 865.17 in BFRI strain and 554.48
in Philippine strain, egg bearing female percentage 27.44 high in BFRI strain where 31.67 in
local strain and 13.33 in Philippine stain, hatching rate 64.56 is high local strain where 82.63
in local strain and 87.58 in Philippine stain, percentage of survival rate 80.10 high in BFRI
strain then 72.45 in Philippine strain and 77.51. Therefore, it can be concluded that BFRI strain
of tilapia is better than Philippine stain and local strain.