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Quality Assessment of Giant Freshwater Prawn (macrobrachium Rosenbergii) in Ice Storage Condition Collected from Selected Farms and Depots

M. N. Haider
Department of Fisheries Technology, Bangladesh Agricultural UniversityMymensingh-2202, Bangladesh

M. Faridullah
Department of Fisheries Technology, Bangladesh Agricultural UniversityMymensingh-2202, Bangladesh

M. S. Reza
Department of Fisheries Technology, Bangladesh Agricultural UniversityMymensingh-2202, Bangladesh

M. F. Hossain
Department of Fisheries Technology, Bangladesh Agricultural UniversityMymensingh-2202, Bangladesh

M. Kamal
Department of Fisheries Technology, Bangladesh Agricultural UniversityMymensingh-2202, Bangladesh

M. N. Islam
Department of Fisheries Technology, Bangladesh Agricultural UniversityMymensingh-2202, Bangladesh

Abstract/ Executive Summary:

This study was conducted to evaluate the quality changes in an important crustacean species giant freshwater prawn, Macrobrachium rosenbergii (locally called golda) at various stages of handling. The samples under study were obtained from farms and depots of four golda producing districts viz. Khulna, Bagerhat, Jessore and Norial area by determining organoleptic and biochemical aspects. The golda samples stored in ice immediately after harvest were in acceptable condition for seven days after harvesting period while the samples obtained from depots from all stations were in acceptable condition for 4 days only. There was a large fall of protein solubility and ATPase activity in all the samples obtained from farms and depots. The fall of solubility and ATPase activity was faster in samples obtained from depots compared to the samples obtained from farm immediately after harvest. The large fall of protein solubility and ATPase activity of samples indicated the denaturation of protein during ice storage.

Keywords: Quality assessment, Macrobrachium rosenbergii, Ice storage, Protein solubility, ATPase activity

Location: Dumuria of Khulna, Bagerhat Sadar of Bagerhat, Avoynagar of Jessore and Kalia of Norail.

Start Date:

End Date:

Program Area: Postharvest and Agro-processing

Commodity: Prawn

Objectives:

To evaluate the quality changes of M. resenbergii collected from different stations through sensory and biochemical techniques.

Methodology:

M. rosenbergii samples were collected from selected farms and depots of Dumuria of Khulna, Bagerhat Sadar of Bagerhat, Avoynagar of Jessore and Kalia of Norail. The samples were transported to the laboratory of Department of Fisheries Technology, Bangladesh Agricultural University, Mymensingh in iced condition in an insulated box to assess the degree of freshness by organoleptic and biochemical methods. For organoleptic quality assessment of Golda on the basis of odor, texture, colour (with shell), colour of flesh and general appearance of prawn, a five member panel was constituted. The panel members included Faculty members of the Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh. Total volatile basic nitrogen (TVB-N) of the samples was determined according to the method described by the Official Journal of the European Communities. Briefly, the procedure is as follows: exactly 10 gm of the ground prawn sample were weighed in a suitable container and mixed with 90 ml of 6% perchloric acid. The samples were homogenized for two minutes with a blender. This was done in cool condition (2-6^oC). In this study Ca₂+- ATPase assay was determined. The reaction mixture for the Ca₂+- ATPase assay contained 25mM Tris, 5mM CaCl₂, 0.1M or 0.5M KCl and 0.25 mg myofibril per ml. After preparation of the reaction mixture, an appropriate quantity of myofibril suspension was pipetted to the reaction mixture followed by 2 mins. pre-incubation.

Source of Information: Progress. Agric. 22(1 & 2): 139 – 149, 2011 ISSN 1017-8139

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Determination of quality assessment of M. rosenbergii by organoleptic and biochemical methods indicate that its shelf-life was higher in samples obtained from the farms than depots. This is an indication that considerable loss of quality during different stages of handling from farm to depot level. The government has already taken initiative through Department of Fisheries (DoF) to reduce such quality loss, which will be helpful to reduce such loss and simultaneously increase the market price beneficial for its producers.

Knowledge Management: Journal