Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Species Interaction Between Carp Species in Polyculture System

M.A.B. Habib
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

B. Sarker
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

M.S. Hossain
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

M.R.I. Sarder
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh 2202

Abstract/ Executive Summary:

A three months experiment was conducted to study the species interactions of two carp species in polyculture system under supplemental feeding. Four species of fishes such as silver carp (Hypophthalmichthys molitrix), mrigal (Cirrhina cirrhosus), catla (Catla catla) and common carp (Cyprinus carpio) were cultured in four different combinations each containing two species. The combination of silver carp and mrigal in treatment 1, and silver carp and common carp in treatment 2 resulted better growth and production than other two treatments of different combinations of catla and common carp, and catla and mrigal.

Keywords: Polyculture, Carp, Species interaction

Location: Faculty of Fisheries, Bangladesh Agricultural University (BAU), Mymensingh.

Start Date: 00-00-2001

End Date: 00-00-2001

Program Area: Animal Health and Management

Commodity: Carp fish

Objectives:

To study the interaction and growth performances of Indian major carps viz. catla (Catla catla) and mrigal (Cirrhina cirrhosus) with exotic carps viz. silver carps (Hypophthalmichthys molitrix) and common carp (Cyprinus carpio).

Methodology:

Study area: The experiment was carried out in eight experimental ponds, situated at the northern side of the Faculty of Fisheries, Bangladesh Agricultural University (BAU), Mymensingh. Preparation of ponds: Embankment of ponds were first repaired and all the aquatic weeds were eradicated manually and mechanically. Then rotenone (20 g/40m²) was applied to kill all the types of unwanted aquatic organisms including insects and predators. The ponds were sun dried for 10 days, and then limed at the rate of 1.0 kg/40m².Cowdung was also used at the rate of 8.0 kg/40m². The lime and cowdung were mixed thoroughly with pond bottom soil. The ponds were serially numbered from 1 to 8 for convenience of study. Pond facilities: The size of the ponds used in this experiment was not equal. It varied from 56 to 116 m². The water depth was maintained to a maximum of 1.50 m using PVC and overflow pipes on the bank fixed at 1.50 m above the pond bottom, so that excess water could be drained out. Collection and preparation of feed: Good quality rice bran, wheat bran and soybean oil were used as feed ingredients in this experiment, which were collected from the local market of Mymensingh town. The ingredients were ground into fine particles and then sieved through a sieve of 0.1 mm mesh. The required amount of wheat bran and rice bran were mixed thoroughly with soybean oil at the ratio of 4:4:1. Then the dough were prepared adding certain amount of water. From these dough, several small balls were made before throwing into the pond to feed the fish. Experimental Design and Procedure: Different species of fish of different feeding habits were stocked to record their interactions, which ultimately focused in respect to feed utilization and their growth. Four species of carps viz. catla (C. catla), mrigal (C. cirrhosus), silver carp (H. molitrix) and common carp (C. carpio) were used as experimental species in the polyculture system. Ponds were divided into four treatments viz.T1, T 2, T 3 and T 4, each having two replicates. Each treatment was provided with fishes of two species. The mean initial weight of catla, mrigal, silver carp and common carp were 1.90, 5.80, 2.20 and 5.81g, respectively. In all the treatments two species were released at the ratio of 1:1. In treatment 1, silver carp and mrigal in ponds 1 and 2, in treatment 2, silver carp and common carp in ponds 3 and 4, in treatment 3, catla and common carp in ponds 5 and 6, and in treatment 4, silver carp and common carp in ponds 7 and 8 were released at the rate of 15,000 fry/ha. The supplemental feed weighing 5% of total fish body weight was provided two times a day, at 9.00 am and 5.00 pm in all the treatments. For every day feeding, the total amount of feed was divided into two equal volume and each half was -applied to the pond as small dough in three places. Sampling: Fortnight sampling was done randomly using a seine net to observe the fish growth, health condition and also to adjust the feeding rate. Growth of fish in each sampling was measured by weighing the fish using top pan balance. At the end of the experiment, fishes were harvested by seine net followed by draining out of pond water. Water quality parameters: Some selected important parameters such as temperature, dissolved oxygen and pH of water in the ponds were recorded between 9.00- 10.00 am in the morning during the study. The temperature and dissolved oxygen of the pond water were determined by DO meter (YSI 58) and pH was recorded by pH meter (Jenway 3020).

Source of Information: Bangladesh J. Fish. Res., 7(1), 2003: 27-32

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The combination of silver carp and mrigal, and the combination of silver carp and common carp gave better growth and production than other two combinations.

Knowledge Management: Journal