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

Investigation Into Carnivorous Feeding Nature of Piranha (pygocentrus Nattereri) Under Laboratory Condition in Bangladesh

M. M. R. Khan
Professor
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Hasan
Ph.D. Fellow
Laboratory of Amphibian Biology, Faculty of Science, Hiroshima University, Higashi-hiroshima shi, Japan

M. A. B. Siddik
Lecturer
Department of Fisheries Biology and Genetics, Dumki Science and Technology University, Patuakhali, Bangladesh

M. I. Hossain
Research Fellow
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

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

Abstract/ Executive Summary:

An experiment was carried out to know the carnivorous feeding nature of piranha (Pygocentrus nattereri) under laboratory condition for a period of 36 days. One-month old nine fish were stocked in nine separate glass aquaria having three feeding treatments each with three replications. Fish were fed with nursery feed (Sabinco feed) in treatment 1(T₁); 50% live + 50% dead small prawns (Macrobrachium rosenbergii) and small fishes (Esomus danricus and Amblypharyngodon mola) in treatment 2(T₂); and 100% live small prawn and fishes in treatment 3 (T₃) twice a day at the rate of 10% body weight. The average weight gain was significantly (P<0.05) higher in T₂ (21.02 ± 0.72) than in T₁(-1.824 ± 0.35) and T₃ (15.36 ± 4.96). The SGR (% day^-1) recorded was significantly (P<0.05) higher in T₂ (12.04 ± 0.01) than T₃ (11.77 ± 0.09). No unused feed was found in T₂ and T₃ but some unused feed was found in T₁. The stomach length, gut length and the RLG values of piranha were significantly (P<0.05) higher than that of taki, Channa punctatus but not of boal, Wallago attu. The presence of razor sharp teeth in both jaws and 30-32 pyloric caeca with 1.84 RLG value are attributed to the piranha as carnivore.

Keywords: Piranha, Carnivorous, Boal, Darkina, Mola, Taki,

Location: Wet Laboratory of Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh.

Start Date: 00-00-2003

End Date: 00-00-2005

Program Area: Animal Health and Management

Commodity: Feed, Fish

Objectives:

To know the carnivorous feeding nature of Piranha (P. nattereri) under laboratory condition.

Methodology:

The experiment was conducted in the Wet Laboratory of Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh. One-month old nine piranha (average weight 60.01 ± 6.07g and length 15.50 ± 0.56 cm) were stocked in nine glass aquaria (45 × 25 × 24 cm³) containing 20 L of deep tube-well water in each and reared for 36 days. The experiment was designed with three treatments (T₁, T₂ and T₃) where each treatment had three replications. Fish were fed by nursery pelleted feed (Sabinco feed) in treatment 1 (T₁); 50% live + 50% dead small prawns (Macrobrachium rosenbergii) and small fishes (darkina, Esomus danricus and mola, Amblypharyngodon mola) in treatment 2 (T₂); and 100% live small prawn and fishes in treatment 3 (T₃). Two-third water from each aquarium was exchanged with new water twice a day and the fecal output and unused feed were removed from the aquarium by siphoning. Aeration to the aquarium was provided for 22 h everyday from air blowers and was stopped for one to two hour when feed was supplied to fish. Feeds used in three different treatments. The analyzed proximate compositions of the different feeds. Feed was provided in each treatment at the rate of 10% body weight of piranha. In case of T₁, 55-60 particles of pelleted feed were given at a time. For T₂ and T₃, 3-4 prawns, 9-10 darkina and 4 -5 mola were given to the fish in each meal for each treatment. After half an hour of feeding, unused feeds were siphoned out from aquaria and recorded. The feed was given twice (0900 and 1600 h) a day. The fish were sampled in weekly interval to determine the change in their growth (length and weight). Sampling was done in the early morning when the fish stomach was almost empty. The specific growth rate was calculated as the percentage increase in body weight per day over given time interval. The length gain (cm), weight gain (g), percent length gain, percent weight gain, and specific growth rate, food conversion rate and survival rate during experimentation with different feeds were tested using one way analysis of variance (ANOVA). Significant results (P<0.05) were further tested using Duncan's New Multiple Range Test (DMRT) to identify significant differences among means. This statistical analysis was performed with the aid of the computer software SPSS program.

Source of Information: Progress. Agric. 21(1 & 2): 151–158, 2010 ISSN 1017-8139

Article Link (Online Journal): http://www.banglajol.info/bd/index.php/PA/article/view/16764/11795

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The highest weight and length gain of piranha were observed, where 50% dead and 50% live feed was used and the lowest were observed, where only commercial pelleted feed was used. The SGR values of T₂ (12.3 ± 0.59) was significantly (P<0.05) higher than that of T₃ (11.77 ± 0.48). The FCR values of T₂ (1.961) was lowered than that of T₃ (2.367). The survival rate was 100% in all the treatments. Generally the higher feeding frequencies were observed in the early morning except in T₁. The weekly feed intake and live weight gain (g) of piranha during 36 days experimental period. In treatment 2, where 50% dead and 50% live feeds were used, the feed intake (41.11 ± 1.6 g) and live weight gain (4.85 ± 0.9 g) were significantly (P<0.05) higher than that of T₃ (36.36 ± 1.4 g and 3.56 ± 1.7 g for feed intake and live weight gain respectively), where 100% live feed was provided. The physicochemical parameters observed in different treatments were more or less same, i.e. water temperature ranged from 24 to 26^oC, pH 8.5 to 8.7 and dissolved oxygen 5.5 to 6.0 ppm. The present research work was formulated to know the food and feeding behaviour of piranha and its harmful effect on small indigenous species (SIS) especially on the biodiversity of SIS in the natural water bodies of Bangladesh.

Knowledge Management: Journal