Effect of different dietary protein level on growth, production and survivability of threatened Mystus cavasius (Hamilton-Buchanan 1822) in pond habitat

Abstract

A study was undertaken to determine the effect of different dietary protein levels on growth, survival and production of Mystus cavasius (Hamilton-Buchanan 1822) with three experimental diets containing 29%, 32% and 35% protein level applied simultaneously to three treatments T1, T2 and T3 respectively each with three replications. The stocking density (1, 11, 150/ha), initial weight (3.00±00 g) and length (2.00±0.00 cm) of fish were same for all the treatments. No significant (P>0.05) difference was found for the mean values of water quality parameters. A suitable range of water quality parameters were recorded with the environment of experimental ponds. In terms of growth, production and survival, relatively highest performance was found in the treatment T3. After 180 days of rearing, average weight gain was 29.16±0.43 g, 31.17±0.30 g and 37.44±0.32 g with the above three different feeds, respectively. The average daily gain (ADG) and specific growth rate (SGR) of all treatments showed significant difference (P<0.05) and the highest value (0.21±0.04 and 1.43±0.01%) was found with the 35% dietary protein level containing diet. Feed conversion ratio (FCR) improved with increase of dietary protein. The findings of FCR were 2.97±0.02 at 29% protein level (T1), 2.64±0.02 at 32% protein level (T2) and 2.20±0.01 at 35% protein level (T3). The results of protein efficiency ratio (PER) values were fairly similar of 1.17±0.02 and 1.18±0.01 for 29% and 32% protein level containing diets respectively indicating low efficiency and the highest efficiency (1.30±0.01) was found with 35% protein level. The findings of condition factor in different treatments for Mystus cavasius were not significantly (P>0.05) varied with the treatments. Calculated values of condition factor were 1.04±0.00, 1.03±0.03 and 1.09±0.05 in treatment T1, T2 and treatment T3, respectively. In pond culture, the performance of treatment T3 was found to be better than the treatment T1 and T2. The production was of 3616±16.74 kg/ha in T3 during the culture period of six months. The best cost benefit ratio (CBR) value (1.98±0.02) was also found with treatment T3. The 35% dietary protein level with treatment T3 resulted in best growth performance and was probably adequate to meet the dietary protein needs of Mystus cavasius (Hamilton-Buchanan, 1822).
 Asian J. Med. Biol. Res. December 2020, 6(4): 659-673

Feeding frequency on the growth and production of endemic near-threatened Ompok pabda (Hamilton 1822) in pond setup

“…Significant difference was found among the treatments at different months. The ammonia content of the three treatments T 1, T 2 and T 3 were 0.15±0.01, 0.13±0.01 and 0.12±0.01; while the findings of Samad et al (2021) Samad and Imteazzaman (2019) were almost similar with the present study. During the study the growth performance of pabda (O. pabda) varied in different feeding frequencies.…”

“…It is comparatively similar to the present study. A recent study of Samad et al (2021) suggested that another small sized catfish FCR ranged between 2.20 and 2.97 which is relevant with the present study. O. pabda is known to be a predominantly omnivorous fish, consuming phytoplankton, zooplankton and decaying suspended organic matter.…”

“…The maximum value was recorded with the T 1 in the fourth months. Samad et al (2021) suggested the temperature in the culture setup were 28.50°C among the treatments while Nahar et al (2021) found temperature fluctuated between 25.01 and 26.13°C; on the other hand Shajib et al (2018) showed the temperature could be ranged between 25.25 and 27.50 °C in hapa set up was found to be suitable for fish growth, as better weight gain and lower FCR were recorded during this period. The amount of dissolved oxygen in water is another key water quality characteristic that fish rely on to survive (Makori et al, 2017).…”

“…In the winter month the oxygen content of the aquaculture pond were less than in the summer months. Samad et al (2021) suggested the dissolved oxygen (DO) level in cage culture might be fluctuated between 5.48 ± 0.02 and 5.72 ± 0.11 mg/l; while the average DO level ranged between 5.02±0.45 and 5.27±0.60 mg/l in small catfish aquaculture pond reported by Nahar et al (2021). On the other hand a poly culture setup suggested that the DO might fluctuated between 5.29±0.27 and 5.93±0.66 mg/l (Zafar et al, 2017).…”

“…To put it another way, nutritionally balanced meals and sufficient feeding are the most important criteria for successful aquaculture operations (Boyd et al, 2020;Klinger and Naylor, 2012). Previous study of feeding frequencies and production emphasized on different aquaculture species including, Labeo rohita, Catla catla, Labeo bata, Mystus cavasius, Clarias batrachus, Amblypharyngodon mola, Chela cachius, Puntius sophore, Heteropneustes fossilis, Notopterus chitala, Mylopharyngodon piceus (Hasan et al, 2002;Mondal et al, 2020a;Nahar et al, 2021;Samad et al, , 2021Samad and Imteazzaman, 2019;Samad et al, 2017a;Samad and Bhuiyan, 2017;Samad et al, 2017b;Samad et al, 2017a); while a single study described the feeding frequency of pabda fish from India but they dealt with the fry (juvenile stage), and no aquaculture feeding frequency of this species were found (Paul et al, 2014). The present study was undertaken with a view to study the growth response of the fish fed on a formulated standard diet at different feeding frequencies.…”