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Integrated Cage-cum-pond Culture Systems with High-valued Climbing Perch (anabas Testudineus) in Cages and Low-valued Carps in Open Ponds

M. Asaduzzaman
Depanment of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

M.K. Shah
Depanment of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

A. Begum
Caritas Fisheries Program, Prokalpa Bhaban, Mirpur 12, Dhaka, Bangladesh

M.A. Wahab
Depanment of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Yang Yi
Aquaculture and Aquatic Resources Management, Asian Institute of Technology, Pathumthani, Thailand

Abstract/ Executive Summary:

An on-farm trial was conducted over 150 days to determine appropriate stocking ratio, growth and production of climbing perch (Anabas testudineus) in cages and carps in open water of ponds in eighteen farmers' ponds from Haluaghat Upazila at Mymensingh district of Bangladesh. One or two 1 m³ cage was suspended in each of 12 earthen ponds and other 6 ponds served as control without cages. Climbing perch of 2-3 g in size were stocked in cages while fingerlings of silver carp (Hypophthalmicthys molitlix), catla (Catla catla), rohu (Labeo rohita), mirgal (Cirhinus cirrhosus), rajpuri (Puntius sarana) and common carp (Cyprinus ca1pio) were stocked at 1 fish/m² with a species ratio of 5:4:4:4:2:1 in open water of all ponds to give cage to open-pond fish ratios of 1:1 (T_1:1) and 2:1 (T₂_:1) and 0:1 (T_0:₁) as three treatments with six replicates each. Survival of climbing perch was higher in T_1:1 (61.67%) than that of T₂_:1 (29.5%>) and was significantly different (p>0.05) between the treatments. Stocking of small size climbing perch fry increased the mortality rate in cages. The net yields of Thai koi were 0.13±0.01 (t/ha) and 0.10±0.01 (r/ha) in treatments T 1,1 and T 2,p respectively and both were significantly different (p>0.05). Survival of open-pond carps was high, ranging from 50 to 91.67% with significantly lower in T_0:₁ than that of T₁_:1 and T₂_:1treatment. Net and gross yield or each carp species were significantly higher in the T₁_:1 and T₂_:1 treatment than that in T₀_:₁treatment. Net revenues were positive but low in all treatments. Therefore, bigger size climbing perch with lower stocking ratio (T_1:₁) is suitable for integrated cage-pond culture of Climbing perch and carps. However, more on-farm trials in different ecosystem with scientific interventions are necessary to develop the technology for further dissemination among the rural farmers.

Keywords: Integrated culture, Cage, Pond, Climbing perch, Carps

Location: Haluaghat Upazila, Mymensingh district.

Start Date: 10-09-2005

End Date: 31-01-2006

Program Area: Resource Development and Management

Commodity: Koi/Climbing

Objectives:

To assess growth and production of fishes in both cages and open ponds, and
To assess the economic benefits of this integrated system.

Methodology:

This experiment was conducted in 18 earthen rural farmers ponds with average 200 m² surface area and average depth of 2 m at two sites (eastern & western) of Haluaghat Upazila under Mymensingh, Bangladesh from 01 September 2005 to 31 January 2006. One or two 1 m³ cage was suspended in each of 12 earthen ponds and other. 6 ponds served as control without cages. Climbing perch of 2-3 g in size were stocked in cages while fingerlings of silver carp (Hypophthalmicrhys molitrix), catla (Catla catla), rohu (Labeo rohita), mirgal (Cirhinus cirrhosus), rajputi (Puntius sarana) and common carp (Cyprinus carpio) were stocked at 1 fish/m² with a species ratio of 5:4:4:4:2:1 in open water of all ponds to give cage to open-pond fish ratios of 1:1 and 2:1 and control (0:1) as three treatments with six replicates each. Cages were made with iron rods covered by net, and were supported by two vertical and one horizontal bamboo poles for each cage. Fingerlings of all carps species and climbing perch were collected from Brahmaputra hatchery, Shambhoogang, Mymensingh, Bangladesh and were stocked on 01 September 2005 .in pond and cages. All fishes were kept into hapa for conditioning and initial length and weight of fingerlings were measured before releasing into the pond. Climbing perch cages were fed on commercial pelleted feed (32.38% crude protein) twice daily at a rate of 10% body weight per clay in the first month and reduced up to 5% body weight in rest of the culture period. Commercial pelleted feed was supplied on a feeding tray (42X26x4 cm), which was hung in each cage. Feed ration was adjusted fortnightly based on sampling weight. No feed and fertilizer was added into the open water of the ponds. Throughout the experimental period, the water quality parameters were recorded monthly. Temperature (⁰C), transparency (cm) and dissolve oxygen (mg/l) were measured between 9.00 and 10.00 am at the pond site. Alkalinity (mg/l), pH and ammonia-nitrogen (mg/l) were measured at Water Quality and Pond Dynamics Laboratory of the Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh. Temperature and dissolved O₂ were measured by a digital DO meter (YSI model 58). Transparency was measured by using a secchi disc and pH with a pH electrode (Jenway, model 3020). Total alkalinity was determined titrimatrically. Ammonia-nitrogen (NH₃-N) was determined by HACH Kit (DR/2010, a direct reading spectrometer). A good number of fishes (10-20% of the stock) were sampled fortnightly by using cast net from open pond and scoop net from cage and then length and weight of each species was taken separately to assess the growth rate of fish. At the end of the experiment, water was pumped out of the ponds and all fishes were collected, counted and weighed individually for each pond to assess the survival rate and production. Experimental data was collected and analyzed. An analysis was conducted to determine economic return of the integrated cage cum- pond culture system for each treatment. The analysis was based on market prices in Bangladesh for harvested fish and all other items, which was expressed in Bangladesh Tk. (US $1 = 68 Tk.). Market prices of harvested carps were 50 Tk/kg and 250 Tk/kg for climbing perch. Market price of carp fingerlings (2 Tk/piece), climbing perch fingerlings (3 Tk/piece) and pelleted feed (20 Tk/kg) were applied to the analysis. Data were analyzed statistically by one-way analysis of variance and linear regression using SPSS (version 10.0) statistical software (SPSS Inc., Chicago, USA). Differences were considered significant at an alpha of 0.05. Means were given with ± standard error (S.E)

Source of Information: Bflngladesh J. Fish Res., 10(1), 2006: 25-34

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Bigger size climbing perch with lower stocking ratio (T₁_:₁) is suitable for integrated cage-pond culture of Climbing perch and carps.

Knowledge Management: Journal