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Temporal Changes in Body Composition of Striped Catfish (pangasius Hypophthalmus, SAUvage, 1878) During Starvation

Palash Halder
Upazila Fisheries Officer, Department of Fisheries, Ministry of Fisheries and Livestock, Bangladesh.

Hazrat Ali
WorldFish, Bangladesh & South Asia Office, Dhaka, Bangladesh.

Abstract/ Executive Summary:

The present study was conducted to investigate the changes in body composition of Thai pangas (Pangasius hypophthalmus) during food deprivation at Fish Physiology and Fish Nutrition Lab of Khulna University, Khulna from 10 November to 7 December, 2007. Fish were starved for a 27 days in10 glass tanks (50cm×30cm×30 cm) at 3 individual per tank. At the initial stage (1st day) of the experiment, the water, protein, lipid and ash contents were 76.88±1.13%, 20.5±0.23%, 1.4±0.02% and 1.20±0.05%, respectively whereas at the 27th day water, protein, lipid, and ash contents were 78.35±0.42%, 19.40±0.25%, 0.80±0.02% and 1.42±0.02%, respectively. The results revealed that lipid and protein concentration of muscle was decreased with prolongation of deprivation, with a significant decline of lipid concentration recorded after 6 days of deprivation (P≤.05). On the other hand, water and ash concentration was increased during deprivation without any significant variation.

Keywords: Pangasius hypophthalmus, starvation, body composition, temporal change.

Location: Fish Physiology and Fish Nutrition Lab of Khulna University, Khulna

Start Date: 10-11-2007

End Date: 07-12-2007

Program Area: Animal Health and Management

Commodity: Pangus

Objectives:

To evaluate the temporal changes in body composition of Thai pangas during food deprivation.

Methodology:

Sample collection: The experiment was carried out at Fish physiology and Fish Nutrition Lab of Fisheries and Marine Resources Technology Discipline of Khulna University, Khulna from 10 November to 7 December, 2007. Thai pangas used for the experiment were collected from Khulna University Lake and were transported live in plastic drum and were maintained in glass stock tanks prior to experimentation. Fish were brought to the Laboratory and acclimatized in the experimental 10 glass tanks (50cm×30cm×30cm) at the rate of 3 fish per tank. Mean temperature of the aquaria was (25±1 °C). All other parameters of water quality like dissolved oxygen (D.O) and pH were kept constant throughout the study. In the experiment, Thai pangas (48.00±2.52 g) were deprived of food for 27 days, during which proximate composition in muscle of the fish was monitored at 3 days intervals. For measurement of body composition during food deprivation, fish were randomly sampled on days 0, 3, 6, 9, 12, 15, 18, 21, 24 and 27, respectively. Sample Preparation: Sample was taken randomly on each experiment day for the determination of proximate composition. After collection, the sample was washed thoroughly with the fresh tap water and kept in a slanting position in a tray to remove the water. A considerable amount of sample was taken for analysis. The sample (muscle) was taken from a site near the dorsal fin. For the proximate composition, each experiment was conducted with three replications. Crude protein (Kjeldahl method), lipid concentration and water content in muscle of fish were determined according to AOAC procedures. Data from the experiment were entered into software package, (MS Excel (Microsoft Corporation) and Statistical Package for Social Science, SPSS (SPSS, Chicago, IL, USA) for statistical analysis. A probability of less than 5% (P < 0.05) was considered as significant in all instances.

Source of Information: International Journal of Fisheries and Aquatic Studies 2015; 3(2): 132-135 ISSN: 2347-5129

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Funding Source:

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Total Budget (Tk.) :

Achievement/Findings:

The study assessed the body composition response with relation to stress induced by different food deprivation regimes. The present study results revealed that water and ash concentration was increased while lipid and protein concentration was decreased with the prolongation of starvation. The results also indicated that Thai pangas utilize body lipid as a major energy source during the first week of food deprivation, and turn to utilize body proteins as an alternative energy source when maximum body lipids are exhausted. However, possible attempt has been made to throw some light on the study of this species. Finally it can be concluded that the findings of the present study could be helpful to create greater interest among the fisheries scientist of the country for intensive research on culture and proper management of Thai pangas.

Knowledge Management: Journal