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Effects of Water Depth on Growth Performance of Indian Major Carps at a Polyculture System in Bangladesh

Md Hafiz All Hosen
Department of Fisheries Management, Faculty of Fisheries, Hajee Mohammad Danesh Science and Technology University, Bangladesh

Koushik Sarker
Department of Fisheries Management, Faculty of Fisheries, Hajee Mohammad Danesh Science and Technology University, Bangladesh

Mousumi Sarker Chhanda
Department of Aquaculture, Faculty of Fisheries, Hajee Mohammad Danesh Science and Technology University, Bangladesh

Nipa Gupta
Department of Aquaculture, Faculty of Fisheries, Hajee Mohammad Danesh Science and Technology University, Bangladesh

Abstract/ Executive Summary:

The main aim of this study was to assess the effect of water depth on the growth performance (length and weight) of table size Indian major carp (Gibelion catla, Labeo rohita, and Cirrhinus mrigala) fishes. Fishes were recorded under different depths (1.20 m, 1.80 m and 2.80 m) for about eight months from February 2016 to September 2016. Water depth was considered as treatment 1 (T1) for 1.20 m, treatment 2 (T2) for 1.80 m and treatment 3 (T3) for 2.80 m, respectively. Randomized Complete Block Design (RCBD) with two replications of each treatment was differentiated at a significant level 0.05. Various water quality parameters such as water temperature, dissolved oxygen, transparency, and pH were also recorded. The survival rate was found maximum (99.23±0.4%) for Labeo rohita fish at 2.80 m water depth and the lowest (95±2.1%) survival rate was observed for Gibelion catla fish at 1.20 m water depth. Results of this study showed that Gibelion catla, Labeo rohita and Cirrhinus mrigala fish cultivated at four feet depth of water produces the lowest average weight of 1398 g, 1048 g and 1050 g, respectively with an average length of 47 cm, 49.2 cm and 46.4 cm, respectively. The maximum average weight of fish 3667 g, 2700 g and 2800 g were obtained at 2.80 m depth of the water with the maximum average length of 63.2 cm, 60.0 cm and 58.6 cm for Gibelion catla, Labeo rohita and Cirrhinus mrigala fish, respectively. From this study, it can be observed that the fishes cultivated at low depth of water yielded the lowest, and shorter in length in contrast to the carps cultivated at higher depth of pond water. However, the growth of Gibelion catla was notably high among other carps.

Keywords: Depth; Growth performance; Indian major Carps; Poly culture system

Location: Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Carp fish

Objectives:

This study was conducted to evaluate the effect of pond depth on the growth performance of Indian major carp’s fishes (Gibelion catla, Labeo rohita and Cirrhinus mrigala).

Methodology:

Experimental site, experimental design and pond facilities: The experiment was carried out for a period of eight months from 1st February to 30th September 2016 in six different ponds located at Niamatpur, Thakurgaon. The experiment had 3 treatments with 2 replications for each. Water depth was considering as treatment (T1) for 1.20 m, treatment (T2) for 1.80 m, treatment (T3) for 2.8 m following randomized complete block design (RCBD). The ponds were rectangular in shape and the total surface area of these ponds was 650 decimals. Each pond had an inlet for watering but no outlet, free from aquatic vegetation, well-exposed to sunlight and sandy loam bottom. The stocked fish fed in the morning and afternoon daily at the rate of 5% body weight with commercial pellet feed (30% crude protein) of name Nourish Poultry and Hatchery Ltd. Pond preparation Before starting the experiment, the ponds were dried and made free from aquatic vegetation. After drying, liming (CaO) was done in all the ponds at the rate of 250 kg/hectare. Ponds were then filled with groundwater at the required depth. Seven days after liming, Urea and triple superphosphate (TSP) were applied each at the rate of 39.0 and 37.0 kg/hectare, respectively. Seven days after fertilization, sumithion was applied in all the ponds at the rate 25 Liter/hectare. Stocking Experimental fishes were stocked in all ponds in the morning on 2^ndFebruary following the experimental design. Containers were kept floating in water for about 30 min in the experimental ponds for acclimatization of temperature before releasing the carp fishes. The weight of approximately 10% of each species for each pond was measured and recorded for estimating initial stocking biomass as well as adjust the feeding rate of fishes. Table 1 shows the stocking density in different ponds. Post stocking management Fertilization: Fertilization was done with Urea (50 kg/hectare) and TSP (25 kg/hectare) on a fortnightly basis during the study period. TSP was dissolved in water for 24 hours before and Urea was dissolved in a bucket in the morning and then applied by spreading with a mug on the pond surface. Fertilization was done fortnightly. Study of physicochemical parameters of water: The Physico-chemical parameters of pond water were recorded fortnightly throughout the experimental period between 10 A.M. and 12 A.M. Physical parameters such as; water temperature (°C), transparency (cm), and water depth (m), dissolved oxygen (mg/L) and pH were measured at the pond site on each sampling day. The depth of water of the experimental ponds was estimated with the help of a graduated wooden scale.

Source of Information: Int J Aquac Fish Sci 5(3): 014-021.

Article Link (Online Journal): DOI: http://doi.org/10.17352/2455-8400.000046

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Therefore, the outcome of this study suggests that the carp fish cultivated at 2.80 m depth of water will be beneficial and more economical for the farmer and more economy will be earned in compared to the 1.20 m and 2.80 m depth of water.

Knowledge Management: Journal