406
Aquaculture of Cypriniäs
PERFORMANCE OF
INDIAN AND EXOTIC CARPS
IN COMPOSITE FISH CULTURE
SYSTEM.
N. SUKUMARÀN and Md.KÀLEEMUR RAHMAN, FÂAhQ/LCQA
TamUî Nada AgMcuÀtu—
&a£
Tu££a0ÆÀn 628 008, INÜIA
Experiments on Composite fish culture of Indian and Exotic carps were condu—
cted in earthen ponds of size ranging from 0.018 to 0.15 ha, with varying
species ratio and stocking densities (3750 to 6110 indiv./ha). The fish pro—
duction obtained, ranged from 2438 to 8448 Kg/ha/year and the average produ—
ction was 4595 Kg/ha/year.Among all the fish stocked, the grass carp showed
the best performance, the average monthly growth being 160 g. The second rank
of
growth was registered by silver carp (126 g/month). Catla ranked next (114
g/month), but the average initial growth was higher than all the other species
upto 3 months, after which the growth showed decline, when compared to silver
carp,
suggesting the dominance of silver carp in foraging during the later
phase of the growth. The mrigal secured the fourth rank in growth (95 g/month).
Rohu, usually the lowest grower (62 g/month) among Indian major carps, when
planted as advanced fingerlings and with limited numbers (2.52) was found to
show better growth, comparable to other species and the growth of rohu was
also good (113 g/month) when the pond was planted with dry palmyra leaves,
which harboured periphyton. Common carp claimed the last position with the
average growth of 45.5 g/month. The survival rates of all the species were
good (72.6—96.5%), with an average survival rate of 88.12. The compatibility
of
different species stocked was also discussed.
THE AQUACULTURE POTENTIAL OF THE RIVERINE CYPRINID, Puntius Schwanefeldi,
FROM KAMPAR RIVER, SUMATRA, INDONESIA. S. SIREGAR, Facu£ty 05 FÂAHWQ/S,
R£au
JcŒan
LaÆtému/w 5, Pakanba}w, INDONESIA.
The culture of carp and related species is well developed in some regions
of
Indonesia, especially in Java, Bali, North and West Sumatra, and South
Celebes.
Culture
conditions in the other regions are very different, and it
has not been possible to cultivate common species (carp) as expected. Riau
Province is characterized by many rivers, lakes, and a great number of species
of fish live htere. At present,
the
aquaculture practices in this region try
to
cultivate local species of fish by using fry collected from natural maters.
Puntius schwanefeldi, one of the important species cultivated, is in demand
et
the
local markets.
In the present experiment we tried to cultivate this
species in ponds and cages. The ponds were fertilized with TSP (Triple superphosphate) and the cages were places at the frontier. The fish in the cages
were
fed with artificial food. The growth rate of the fish in ponds and cages
was
measured.
Some biological aspects of the fish have also been observed,ie.
food habit, maturation, fecundity and spawning cycle.
DETERMINING THE POND SURFACE REQUIRED AT BACH REARING STAGE IN A PLAN OF FISH“
FARM MANAGEMENT. J. WENIAœSKI
,
1mti;tuÆe 05 Intand FMhQ/LÂM, Zab£eMcc,
05—500
POLAND.
This method permits rapid, exact calculation of the pond surface needed at
each rear1ng stage of a given species. The following paramaters are used :
rearing
technology : types of fish farms corresponding to different rear—
ing
stages; 2) final individual weight anticipated at fishing in each type
Of
3) mean
fish yield per ha (intensification level) for each pond type;
4) fish surv1val rate for each pond type. Data on a rational distribution of
pond
Surfaces allow
:
l) a rapid computation of several alternatives of
final yield (for
fish for consumption) and the production of stocking
fish for each rear1ng stage; 2) the choice among these alternatives of a more
Aquaculture of Cypriniäs
PERFORMANCE OF
INDIAN AND EXOTIC CARPS
IN COMPOSITE FISH CULTURE
SYSTEM.
N. SUKUMARÀN and Md.KÀLEEMUR RAHMAN, FÂAhQ/LCQA
TamUî Nada AgMcuÀtu—
&a£
Tu££a0ÆÀn 628 008, INÜIA
Experiments on Composite fish culture of Indian and Exotic carps were condu—
cted in earthen ponds of size ranging from 0.018 to 0.15 ha, with varying
species ratio and stocking densities (3750 to 6110 indiv./ha). The fish pro—
duction obtained, ranged from 2438 to 8448 Kg/ha/year and the average produ—
ction was 4595 Kg/ha/year.Among all the fish stocked, the grass carp showed
the best performance, the average monthly growth being 160 g. The second rank
of
growth was registered by silver carp (126 g/month). Catla ranked next (114
g/month), but the average initial growth was higher than all the other species
upto 3 months, after which the growth showed decline, when compared to silver
carp,
suggesting the dominance of silver carp in foraging during the later
phase of the growth. The mrigal secured the fourth rank in growth (95 g/month).
Rohu, usually the lowest grower (62 g/month) among Indian major carps, when
planted as advanced fingerlings and with limited numbers (2.52) was found to
show better growth, comparable to other species and the growth of rohu was
also good (113 g/month) when the pond was planted with dry palmyra leaves,
which harboured periphyton. Common carp claimed the last position with the
average growth of 45.5 g/month. The survival rates of all the species were
good (72.6—96.5%), with an average survival rate of 88.12. The compatibility
of
different species stocked was also discussed.
THE AQUACULTURE POTENTIAL OF THE RIVERINE CYPRINID, Puntius Schwanefeldi,
FROM KAMPAR RIVER, SUMATRA, INDONESIA. S. SIREGAR, Facu£ty 05 FÂAHWQ/S,
R£au
JcŒan
LaÆtému/w 5, Pakanba}w, INDONESIA.
The culture of carp and related species is well developed in some regions
of
Indonesia, especially in Java, Bali, North and West Sumatra, and South
Celebes.
Culture
conditions in the other regions are very different, and it
has not been possible to cultivate common species (carp) as expected. Riau
Province is characterized by many rivers, lakes, and a great number of species
of fish live htere. At present,
the
aquaculture practices in this region try
to
cultivate local species of fish by using fry collected from natural maters.
Puntius schwanefeldi, one of the important species cultivated, is in demand
et
the
local markets.
In the present experiment we tried to cultivate this
species in ponds and cages. The ponds were fertilized with TSP (Triple superphosphate) and the cages were places at the frontier. The fish in the cages
were
fed with artificial food. The growth rate of the fish in ponds and cages
was
measured.
Some biological aspects of the fish have also been observed,ie.
food habit, maturation, fecundity and spawning cycle.
DETERMINING THE POND SURFACE REQUIRED AT BACH REARING STAGE IN A PLAN OF FISH“
FARM MANAGEMENT. J. WENIAœSKI
,
1mti;tuÆe 05 Intand FMhQ/LÂM, Zab£eMcc,
05—500
POLAND.
This method permits rapid, exact calculation of the pond surface needed at
each rear1ng stage of a given species. The following paramaters are used :
rearing
technology : types of fish farms corresponding to different rear—
ing
stages; 2) final individual weight anticipated at fishing in each type
Of
3) mean
fish yield per ha (intensification level) for each pond type;
4) fish surv1val rate for each pond type. Data on a rational distribution of
pond
Surfaces allow
:
l) a rapid computation of several alternatives of
final yield (for
fish for consumption) and the production of stocking
fish for each rear1ng stage; 2) the choice among these alternatives of a more