Effects of addition of tilapia on the abundance of periphyton in freshwater prawn culture ponds with periphyton substrates

An experiment was conducted to evaluate the effect of addition of tilapia on abundance of periphyton in freshwater prawn, Macrobrachium rosenbergii (de Man) in periphyton based culture system for a period of 120 days at Fisheries Field Laboratory Complex, Bangladesh Agricultural University, Mymensingh. A large pond (83×8.9 m) was drained completely and partitioned by galvanized iron sheet into 18 small ponds of 40 m2 each; of which 6 ponds were used for this experiment. The experimental ponds were divided into 2 treatments each with 3 randomly selected ponds. The absence and presence (0 and 0.5 individual m-2) of tilapia (Oreochromis niloticus) were investigated in 40 m2 ponds stocked with 3 prawn juveniles (5±0.05 g) m-2 with added substrates for periphyton development. A locally formulated and prepared feed containing 30% protein was supplied considering the body weight of prawn only. Addition of periphyton substrates significantly reduced the inorganic N-compounds (TAN, NO2-N, and NO3-N) in water column. Forty six genera of periphyton were identified belonging to the Bacillariophyceae (10), Chlorophyceae (21), Cyanophyceae (7), Euglenophyceae (2), Crustacea (1) and Rotifera (5) with significant difference (P<0.05) of phyto-periphyton except Euglenophyceae and without significant difference (P>0.05) of zoo-periphyton between the treatments. The abundance of periphyton biomass in terms of dry matter, ash, ash free dry matter and chlorophyll-a were significantly higher in tilapia-free ponds comparing to tilapia added ponds. Benthic organisms had no significant difference (p>0.05) between the treatments. Addition of tilapia in periphyton-based system benefited the freshwater prawn culture through (i) reducing toxic inorganic nitrogenous compounds in water (ii) reducing demand for supplemental feed (iii) using periphyton as additional natural feed and, (iv)improving survival and production of prawn and tilapia.DOI: http://dx.doi.org/10.3329/jbau.v10i2.14924 J. Bangladesh Agril. Univ. 10(2): 313-324, 2012

Download Full-text

Probopyrus Buitendijki (Isopoda, Bopyridae), a Parasitic Isopod on Macrobrachium Rosenbergii in Timun River, Negeri Sembilan, Malaysia

Crustaceana ◽

10.1163/001121611x586710 ◽

2011 ◽

Vol 84 (9) ◽

pp. 1051-1059 ◽

Cited By ~ 1

Author(s):

F. C. Choong ◽

G. A. Bristow ◽

F. Shaharom ◽

Z. Abdul Rashid ◽

B. C. Kua

Keyword(s):

Adult Female ◽

Macrobrachium Rosenbergii ◽

The Body ◽

Freshwater Prawn ◽

Histopathological Study ◽

Giant Freshwater Prawn ◽

Gill Chamber ◽

Gill Filaments ◽

De Man ◽

Parasitic Isopod

AbstractA bopyrid isopod was found attached in the gill chamber of a wild giant freshwater prawn, Macrobrachium rosenbergii (De Man, 1879) from the Timun River, Negeri Sembilan (Malaysia) (2°28′N 102°02′E), with a prevalence of 0.27% (2/743). The specimens measured 18.25±0.35 mm in length and 15.25±0.35 mm in width. The body of the isopod was subcordate and slightly distorted. It has five oostegites, with black pigment. The first oostegites are large, the 2nd and 3rd are suboval and smaller, while the 4th and 5th are long and ending in sharp points. Both specimens were identified as adult female Probopyrus buitendijki (Horst, 1910). The isopod was found only in January of 2009 and 2010, which months recorded a relatively low rainfall. A histopathological study of the infected gill showed impairment of the gill filaments, necrosis, and hyperplasia. Such effects may reduce the respiration efficiency of the gills.

Download Full-text

Evaluation of claw development in giant freshwater prawn, Macrobrachium rosenbergii (de Man, 1879)

Indian Journal of Fisheries ◽

10.21077/ijf.2018.65.1.61139-19 ◽

2018 ◽

Vol 65 (1) ◽

Author(s):

P. P. Suresh Babu ◽

P. Srinivasa Rao ◽

I. F. Biju ◽

C. Dharmadurai ◽

A. M. Babitha Rani

Keyword(s):

Body Weight ◽

Macrobrachium Rosenbergii ◽

The Body ◽

Freshwater Prawn ◽

Weight Class ◽

Class Interval ◽

Giant Freshwater Prawn ◽

Males And Females ◽

De Man ◽

The Relationship

Dynamics of claw development in Macrobrachium rosenbergii (de Man, 1879) was evaluated through monosex culture. The segregated males and females were stocked separately in two earthen ponds of 200 m2 area, at a density of 2.5 m-2 and reared for 3 months. Percentage contribution of claw weight to body weight (PCB) increased from 8.96 to 14.4% in the first month, but the change was minimal (14.4 to 17.19%) during the rest of the culture period. In order to delineate the relationship further, the data obtained was pooled together and classified into different classes based on the body weight (class interval 10 g). Interestingly, PCB in males decreased gradually upto 30 - 40 g weight class and then increased considerably for higher weight classes. But for females, the increase in PCB was marginal.

Download Full-text

Biofilm formed on different natural substrates enhances the growth and survival in Macrobrachium rosenbergii (de Man, 1879) juveniles

Indian Journal of Fisheries ◽

10.21077/ijf.2018.65.1.70291-09 ◽

2018 ◽

Vol 65 (1) ◽

Cited By ~ 1

Author(s):

P. K. Jesna ◽

B. R. Pillai ◽

Namita Naik ◽

Harmohan Pradhan

Keyword(s):

Water Exchange ◽

Macrobrachium Rosenbergii ◽

Freshwater Prawn ◽

Fiber Glass ◽

Paddy Straw ◽

Daily Growth ◽

Growth And Survival ◽

Significant Difference ◽

De Man ◽

Pellet Feed

An experiment of 65 days duration was conducted to study the effect of biofilm formed on different natural substrates at different substratum densities on the growth and survival of juveniles of freshwater prawn Macrobrachium rosenbergii (de Man, 1879). Natural substrates like dried paddy straw and cut grass were evaluated as substratum for biofilm production. The experiment was conducted in fiber glass tanks of 500 l capacity. The study comprised six treatments viz., dried paddy straw at 60 (T1); 120 (T2) and 240 (T3) g tank-1 and cut grass at 60 (T4) and 120 (T5) g tank-1, each with three replicates following a completely randomised design. Prawn juveniles reared without any substratum acted as control. Ten days after the introduction of substratum in the tanks, prawn juveniles (2.01 g±0.37) were stocked at a density of 40 m-³. The juveniles were fed with 2 mm commercial pellet feed (30% protein) at 5% of the biomass. No water exchange was done in the treatment tanks whereas in control tanks 50% water exchange was done once every week. The study revealed significantly (p<0.05) higher survival rate (%) in the treatment tanks (94.4±9.6, 80.5±12.7, 86.1±12.7, 86.1±4.8 and 91.6±8.35 for treatments T1, T2, T3, T4 and T5 respectively) compared to the control (52.8±9.5). Among treatment tanks, T2 and T3 showed significantly higher (p<0.05) average daily growth (g d-1) (0.055±0.005 and 0.057±0.005 respectively) when compared to other treatments (0.0367±0.02 for T1 and 0.0373±0.01 for T5). But the specific growth rate did not show any significant difference among the treated groups including control. Use of biofilm significantly reduced the usage of water (by 2.9 times) compared to control, which is significant considering the predicted water scarcity in future.

Download Full-text

Nutritional value of wild, cultured and frozen prawn Macrobrachium rosenbergii (De Man, 1879)

International Journal of Natural Sciences ◽

10.3329/ijns.v1i2.8821 ◽

1970 ◽

Vol 1 (2) ◽

pp. 52-55 ◽

Cited By ~ 3

Author(s):

A Ferdose ◽

MB Hossain

Keyword(s):

Proximate Composition ◽

Dry Matter ◽

Nutritional Value ◽

Macrobrachium Rosenbergii ◽

Proximate Analysis ◽

Freshwater Prawn ◽

Adequate Food ◽

Aoac Method ◽

De Man ◽

Different Sources

This investigation principally entails with the proximate analysis of the constitutional composition of fresh water prawn, Macrobrachium rosenbergii. Protein, fat, moisture, ash and carbohydrate content in prawn collected from wild, culture farm and market (frozen form) during April, 2010 were determined dry matter basis by following AOAC method to evaluate the nutritional value of prawn from different sources. The proximate composition of the muscle tissue of wild, cultured and frozen prawn were found to be 68.27 ± 0.23, 74.85 ± 0.65 and 60.8 ± 0.12% protein; 6.99 ± 0.92, 5.61 ± 0.37 and 8.21 ± 0.14 % carbohydrate; 8.44 ± 0.10, 9.15 ± 0.61 and 7.89 ± 0.005% lipid; 16.30 ± 0.65, 10.14 ± 0.55 and 23.09 ± 0.39% ash; 78.3 ± 5.83, 77.1 ± 1.69 and 74.9 ± 0.98% moisture respectively. Prawns collected from all sources showed reasonably good proximate composition although variation occurred. This indicates that the wild has also provided with adequate food. The proportion of total protein and lipid were found to be higher in cultured prawns than in the others. In contrast, the proportions of ash contents were higher in frozen prawns when compared with other two, and moisture contents were higher in wild and cultured prawn. In the present study, nutrition wise, the adult cultured prawn was better compared to the wild and frozen prawn. Since M. rosenbergii is a good source of protein, and very low in fat, it can be used as a healthy choice of food for human consumptions. Key words: Proximate composition; freshwater prawn; Macrobrachium rosenbergii; nutritional value. DOI: http://dx.doi.org/10.3329/ijns.v1i2.8821 International Journal of Natural Sciences (2011), 1(2):52-55

Download Full-text