Growth and production performance of carps in shaded pond in Barisal, Bangladesh

Mm Alam,Mm Haque,Rj Rumpa,Sm Rahamatullah

doi:10.3329/jbau.v14i2.32699

Mm Alam, Mm Haque + Show 2 more

Open Access

https://doi.org/10.3329/jbau.v14i2.32699

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Abstract

The shaded nature of ponds in Barisal region constrained the pond polyculture. The present study was conducted with such shaded ponds to evaluate the growth and production performance of different carp species including rohu (Labeo rohita), catla (Catla catla), mrigal (Cirrhinus cirrhosus) and common carp (Cyprinus carpio) in polyculture system. In this experiment, polyculture of carps at similar densities were conducted in two different types of shaded ponds selecting nine ponds at Dinar village in Charkawa Union of Barisal Sadar sub-district. Out of 9 ponds, 5 were heavily shaded ponds (HSP) and 4 were moderately shaded ponds (MSP) considered as T1 and T2, respectively. The average area of HSP and MSP was 0.03±0.01 and 0.07±0.03 ha, respectively which were experimented for a period of l80 days from July to December 2013. Carps were stocked at the rate of 14820/ha with the ratio of rohu, catla, mrigal and common carp - 2:1:2:1. Carps were fed with supplementary feed of the mixture of rice bran, wheat bran and mustard oilcake at the rate of 10% body weight for first 3 months and 5% body weight for last 3 months. The water quality parameters such as temperature, dissolved oxygen, pH, nitrite and ammonia were recorded. The highest weight gain was found in common carp (467.00±0.00 g) in T1 and lowest weight gained in mrigal (172.46±26.80 g) in T1. Apart from common carp, the individual growth and production of other species was higher in MSP compared to HSP. The higher production was obtained in T2 (2122.92±333.60 kg/ha/year) compared to T1 (1547.79±132.94 kg/ha/year).J. Bangladesh Agril. Univ. 14(2): 235-241, December 2016

Highlights

Bangladesh is a country blessed with vast fisheries resources including rivers, flood plains, lakes, ponds, ox-bow lakes, etc. which are full of 260 different fish species (DoF, 2014)
The pond dykes in Barisal is full of trees which create shadow and reduced sunlight penetration which negatively impacts on fish culture (Haque et al, 2015)
There is a potential to practice carp polyculture which has been studied through the field experiment

Summary

Introduction

Bangladesh is a country blessed with vast fisheries resources including rivers, flood plains, lakes, ponds, ox-bow lakes, etc. which are full of 260 different fish species (DoF, 2014). Which are full of 260 different fish species (DoF, 2014). The total annual fish production in Bangladesh was estimated at 3.41 million MT in 2012–13 fiscal year, of which 1.86 million MT (54.54%) were obtained from inland aquaculture (DoF, 2014). The production of fish per hectare in Bangladesh is much lower than other fish producing countries of the world. This is due to the lack of proper knowledge on the scientific fish culture and management practices. Pond fish culture is the main aquaculture system in Bangladesh contributing to the bulk of production. Among different technologies of fish culture, pond polyculture is one of the most important culture techniques

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