Dept. of Aquaculture

Comparative study of the Proximate and Amino acids composition of wild versus farmed long-whiskered catfish (Sperata aor) broodstock during reproductive season

2025-03-17T06:45:44Z

Comparative study of the Proximate and Amino acids composition of wild versus farmed long-whiskered catfish (Sperata aor) broodstock during reproductive season KHANAM, MAHBUBA The study was conducted to compare the proximate and amino acids composition of ovary oocytes and liver tissues of wild and captive female broodstock (Sperata aor) during reproductive season from July to August, 2015 in the Sylhet Agricultural University. A total of 60 female brood fishes were taken in the current study which consisted of 30 captive and 30 wild individuals. Biometric, reproductive, proximate and amino acids variables were undertaken for this brood fish research study. There was no significant difference (p>0.05) between the length of wild (37.80±1.74) and captive (37.90±1.74) broodstock. The fish length and body weight showed a strong positive relationship (R = 0.99) in case of both wild and captive broodstock. Body weight and ovipositor diameter displayed a positive relationship with ovary weight where R 2 =0.99 respectively. Gonadosomatic index (%) and Hepatosomatic index (%) value also showed a strong positive relationship in wild and captive broodstock where R 2 2 =0.99 and R = 0.9 respectively. Furthermore, the absolute fecundity was 73837.68±2890.47 and 73810.81± 2881.79 in wild and captive fish respectively that showed there were no significant difference (P>0.05) in the fecundity values of both broodstock. In addition, there was also no significant difference (P>0.05) in the proximate composition such as protein, lipid, and ash in ovary oocytes and liver tissues of wild and captive broodstock. However, there is slightly higher protein content in the liver tissues (12.72 ±0.01) and ovary oocytes (12.64 ±0.01) of wild broodstock compare to the liver tissues and ovary oocytes of captive broodstock. A total of eighteen amino acids were investigated in the brood fish ovary oocytes and liver tissues of wild and captive broodstock whereas two essential amino acids, phenylalanine and lysine and two non-essential amino acids, glutamic acid and glycine highly significant (P< 0.05 ) differences among the amino acids in the ovary oocytes and liver tissues of wild broodstock. It is assumed that these two essential amino acids may enhance the spawning activities in wild broodstock of the haor basin of Sylhet. This study may assist to know the factors for spawning and reproductive information of broodstock management in captive condition as well as conservation and protection for sustainable aquaculture management of Sperata aor in the haor basin of Sylhet. 2 2 = 0.89 and R

DIFFERENT FEED EFFECT ON GROWTH AND BREEDING PERFORMANCE OF SWORDTAIL (Xiphophorus helleri)

2025-03-17T06:39:55Z

DIFFERENT FEED EFFECT ON GROWTH AND BREEDING PERFORMANCE OF SWORDTAIL (Xiphophorus helleri) Parvez, Md. Masud The present research was conducted to investigate the effect of different feeds on growth and breeding performance of swordtail fish (Xiphophorus helleri) for 140 days (from 20 June to 7 November 2015) in aquarium. The treatments were T1 (formulated sinking pellet feed of 37.6% protein), T2 (commercial floating pellet feed Mega having 27.6% protein) and T3 (commercial floating pellet feed Fast red having 29.5% protein) with three replications each. Each aquarium was stocked 20 fry (mean initial weight 0.05±0.001g and length 1.68±0.16cm). During the study period, the fry were fed twice a day up to satiation level. At the end of experiment the highest mean weight gain (2.60 ± 0.16g) was found in T3 and the lowest (1.73±0.26g) in T1. The highest mean length gain (4.39 ± 0.05cm) was in T3 and the lowest (3.54 ± 0.13cm) in T1. The highest SGR (2.83±0.04) was found in T3 where as the lowest (2.55±0.11) in T1. The highest FCR (1.99) was in T1 while the lowest (1.32) in T3. The highest survival rate (86.67±2.88%) was recorded in T3 and the lowest (65±5%) in T1. There were significant differences (P<0.05) between T1 and T3 in case of weight gain, length gain, SGR and FCR. In these cases, there was no significant difference between T1 and T2 or T2 and T3 except length gain. Survival rate of T2 was significantly different from T1 and T3. The highest GSI% (9.48±0.66), HSI% (3.16±0.21), relative fecundity (18.48±3.20), number of spawn (36±4), weight of spawn (0.0049 ±0.0006g) and length of spawn (0.76±0.06cm) were found in T3 and the lowest GSI% (5.92±0.62), HSI% (2.33±0.39), relative fecundity (11.55±1.55), number of spawn (22.33±2), weight of spawn (0.0046±0.0006g) and length of spawn (0.57±0.06cm) in T1. There were significant differences between T1 and T3 in case of GSI, HSI, number of spawn and length of spawn. The water quality parameters were monitored at 20 day intervals and their ranges were: temperature 26.8-27.8 C, dissolved oxygen 6-7.5 mg/l, pH 6.26-7.46, ammonium 0.258-0.34, alkalinity 6.4-7 mg/l, nitrite 0.00 mg/l and Phosphate 0.50 mg/l. There was no significant difference among the treatments in water quality parameters. Possible reasons for lower growth and breeding performance of T1 may be its higher content of fiber and also mustard oil cake ingredient containing antinutritional factor glucosinolate, enzyme thioglucosidase and toxic erucic acid and growth reducing factor in rice bran. So, it may be recommended that the commercial pelleted floating feed “fast red” is the best feed among the experimental feeds for growth and breeding performance of swordtail and the formulated feed may be used for further experiment after reducing fiber content, steaming rice bran and a soaking 0 treatment of mustard oil cake.

IMPACT OF TECHNOLOGY ON FISH PRODUCTION IN SYLHET DISTRICT

2025-03-17T06:34:15Z

IMPACT OF TECHNOLOGY ON FISH PRODUCTION IN SYLHET DISTRICT SHOBHO, SHUDIPTA AHMED A study was conducted to assess the existing technologies used by the fish farmers and its impact on the fish production in Sylhet district from July, 2015 to December 2015. Three upazilas were selected as experimental sites for the study namely Sylhet sadar, South surma and Golapganj under Sylhet district. The data were collected using questionnaire interview and the data were analyzed using statistical method followed SPSS software. In this study, in terms of input such as cow-dung, urea, TSP, lime, rice barn and mustard oil cake, there is a highly significant difference (P≤0.05) between semi-intensive culture technology compared to extensive in the farmer level. In terms of cost item parameters such as fingerlings, feed, fertilizers, human labourers, harvesting and marketing and miscellaneous there is a highly significant difference (P≤0.05) between semi-intensive culture technology compared to extensive. This study reveals that there are highly significant differences for all cost item parameters between extensive and semiintensive technology except for land use cost (P≥0.05). In terms of production output, there is a highly significant difference (P≤0.05) between semi-intensive culture technology compared to extensive. The mean values of the parameter net profit for extensive and semi-intensive culture were 78330.00±19223.85 tk/ha/yr and 419470.00±368024.69 tk/ha/yr, respectively and there is a highly significant difference (P≤0.05) between semi-intensive culture technology compared to extensive. Therefore, we can assume that, semi-intensive technology has a highly positive impact on fish production as well as more profitable for aquaculture in Sylhet district. Necessary training on scientific fish culture and use of technologies, establishment of hatchery by GOs and NGOs to ensure quality fingerlings and massive extension work can mitigate the problem related to fish culture in the study area.

STUDY ON DIFFERENT AQUACULTURE PRACTICES IN KISHOREGANJ DISTRICT AND ITS IMPACT ON FISH PRODUCTION

2025-03-17T06:27:36Z

STUDY ON DIFFERENT AQUACULTURE PRACTICES IN KISHOREGANJ DISTRICT AND ITS IMPACT ON FISH PRODUCTION IMRAN, MOHAMMAD The present study was conducted to determine the status and practices of fish farming in a promising aquaculture area of Bangladesh. Data were collected from 180 farmers randomly, covering 9 Unions under Bajitpur Upazilla of Kishoreganj district for a period of five months from August 2015 to December 2015. Data are represented within the view of pie diagram, table form and bar diagram. The present study indicated that most of the farms were established within last ten years and half of the farm were established an agricultural land. Various chemicals and fertilizers were commonly used. The present study indicated that agriculture were the main income source for 56.67% farmers and aquaculture were income source for 30% farmers. Highest number of farm (46.67%) established within five years before and 66.67% of the farmers have their own pond. Twelve different fish species were found to be cultured in these farms. It was also found that 40% farmers used polyculture and 60% farmers used monoculture system. Water retention capacities in the study area were very good. Although there were some adverse socio-economic and environmental impacts, fish farming played an immense role in the increase of socioeconomic condition, opportunity for employment and poverty alleviation of large number of population. The farmers currently facing a number of constraints such as lack of good quality seed, poor loan facility, lack of capital, marketing and management problems. To improve the overall conditions of fish farmers, it is necessary to upgrade the existing fish farming practices through institutional initiatives.