Growth and carcass composition of giant freshwater prawn, Macrobrachium rosenbergii (De Man), fed different isonitrogenous and isocaloric diets

Abstract

A feeding experiment was conducted for 135 days to observe the effect of different isonitrogenous (35% crude protein) and isocaloric (385 kcal) diets on the growth and carcass composition of giant freshwater prawn, Macrobrachium rosenbergii (De Man 1879). Three experimental diets (ED1, ED2 and ED3) were prepared using locally available ingredients. These diets differed mainly in terms of percent contribution of major protein sources such as fish meal, soybean meal, groundnut oil cake and mustard oil cake. Experimental diets were evaluated against a commercial diet, which served as the control (CD). Juveniles 1.87–2.44 g in size were stocked at a population density of 40 000 ha−1 and fed thrice daily at 10% in the beginning and reducing gradually to 7% and 5% of the body weight during the experimental period. No significant differences (P>0.05) in the growth performance were observed; however, a significantly (P<0.05) higher yield (721.9 kg ha−1 135 days−1) was recorded for prawn fed with control diet, followed by experimental diet 2 (676.5 kg ha−1 135 days−1, having soybean meal as a major protein source). The survival ranged between 63.8% and 77.7%, with different diets showing significantly higher survival. The apparent feed conversion ratio values of diets ranged between 3.15 and 3.49, with experimental and control diets showing non‐significantly lower AFCR values. At the end of the experiment, representative specimens from each treatment were collected and their carcass composition was measured. Analysis of variance showed that carcass protein and total carbohydrate contents were significantly (P<0.05) higher in prawns fed on a fish–soybean meal‐based diet (ED3) and a control diet. The total lipid contents of prawns, however, did not differ significantly among the various dietary treatments. The results of our study suggest that the experimental diets could be used effectively for M. rosenbergii without compromising growth and flesh quality.

Growth and economic analysis of freshwater prawn,Macrobrachium rosenbergii(de Man), produced with feeds substituting sunflower cake for fish meal, soya bean meal and mustard oil cake

“…The survival rates of the present study also higher compared to the survival rate 64%–78% reported by Gupta et al. (). Most of the prawn farmers in Bangladesh stock postlarvae for grow‐out but in the study we have stocked juveniles.…”

“…Low‐lying rice fields modified by raising dikes locally (called ghers) are widely used for integration of shrimp and prawn cultivation with fish, rice and vegetables. Relatively high market values, fast growth, salinity and temperature tolerance and disease resistance have led increasing numbers of farmers to convert rice fields to ghers for freshwater prawn farming (Roustaian, Kamaruddin, Omar, Saad & Ahmad, ; Gupta, Sehgal & Sehgal, ; Ahmed, Allison & Muir ). During 2013–2014 Bangladesh earned US$ 528 million by exporting 47,635 MT of shrimp and prawn, with a 30% contribution from prawns (DoF ).…”

Nutritional Value of Macrobrachium rosenbergii Prawns Fed on Extruded Feeds Enriched with Linseed and Whey Proteins

“…Although no significant differences in growth rate were observed by Gupta et al [29] for Macrobrachium rosenbergii juveniles fed different experimental isonitrogeneous and isocaloric diets, which varied in terms of percent contribution of major protein sources (fish meal, soybean meal, groundnut oil cake and mustard oil cake), some differences were observed in the present work. Figure 1 shows the variation in weight for the three groups of shrimps, fed for 90 days (Figure 1).…”

Nutritional Content of Wild and Cultured Eel (Anguilla bicolor) from Southern Coast of Central Java

“…Otherwise Onyia et al (2013) reported that moisture content of wild Heterobranchus bidorsalis was lower than cultured one. The difference trend of moisture content in wild and cultured fish could be as a result of age, diet and environmental factors (Gupta et al, 2007). …”