Hossain M.A.,Kuwait Institute for Scientific Research |
Sultana Z.,Wakayama University |
Kibria A.S.M.,Hajee Mohammad Danesh Science and Technology University |
Azimuddin K.M.,Bangladesh Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2012
The optimum dietary protein requirement of a Thai strain of climbing perch (Anabas testudineus, Bloch, 1792) fry was investigated by feeding six semi-purified diets containing varying levels of dietary protein within a range of 25-50% over an 8 week feeding period. Fish meal was used as protein source. The experiment was conducted in a recirculatory system consisting 18 glass aquaria of each 65 litre capacity. Each treatment had three replicates. Each of the aquaria was stocked with 12 fingerlings of A. testudineus with a mean initial weight of 1.04 ± 0.02 g. Fish were fed to apparent satiation three times daily. Statistical analysis of growth data showed that percent weight gain, feed conversion ratio (FCR), protein efficiency ratio (PER) and body composition were significantly (P<0.05) affected by dietary protein levels. The weight gain and specific growth rate (SGR) of fish in all dietary groups increased proportionally with the increase in dietary protein concentration to level of 40% and thereafter decreased with further increase in dietary protein levels. Fish fed diet 4 containing 40% protein level showed significantly (P<0.05) the highest weight gain. The FCR values ranged between 1.95 and 5.73 and the best FCR value was obtained with diet 4. The PER decreased with increasing dietary protein levels. The PER values ranged between 0.64 and 1.27 and the apparent net protein utilization (ANPU%) values ranged between 9.76 and 19.80%. In general, there was a progressive decrease in carcass protein and an increase in carcass lipid. On the basis of observed weight gain, SGR and FCR, a diet containing 40% protein with a protein to energy (PE) ratio of 92.63 (mg protein/ Kcal gross energy) is recommended for maximum growth of A. testudineus under experimental condition used in this study. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.
PubMed | Bangladesh Fisheries Research Institute, Khulna University and University of South Australia
Type: Journal Article | Journal: Pakistan journal of biological sciences : PJBS | Year: 2014
Although, Escherichia coli is widely distributed in the environment, only a small percentage is pathogenic to humans. The most commonly encountered are those belonging to the Enterotoxigenic (ETEC), Enteroinvasive (EIEC), Enterohaemorrhagic (EHEC) and Enteropathogenic (EPEC) subtypes. Aquaculture premises specially shrimp farm in tropical and subtropical countries largely susceptive to different types of E. coli strains. With the PCR system, an attempt was taken to identify the virulent E. coli in a rapid basis from water, sediment and live shrimp from different shrimp farms established in the shrimp production areas of southwest part of Bangladesh. The target genes chosen for this investigation included the PhoA, a housekeeping gene in all E. coli and thereafter the virulent genes LT1, LT1 and ST1 of ETEC, the VT of EHEC and EAE of EPEC, which were amplified with the primers designed for their specific genes. The restriction enzyme conformation and the gel electrophoresis bands showed the presence of E. coli, among which ETEC and EPEC groups were present in the environmental and biological samples of shrimp farms, brings up into the human health concern. The sanitation conditions amid farm were also investigated to find the link of pathogenic E. coli, which came into the result of less infection if the farm maintains improved sanitation. This study has clearly urged the exigency of periodical quick check of virulent E. coli with the versatile PCR system from brood management to post-harvest handling of shrimp.
Mofasshalin M.S.,University of Rajshahi |
Bashar M.A.,University of Rajshahi |
Bashar M.A.,Bangladesh Fisheries Research Institute |
Alam M.M.,University of Rajshahi |
And 4 more authors.
Asian Journal of Animal and Veterinary Advances | Year: 2012
The present study attempts to describe the parasitic infestations of three Indian minor carps (Labeo bata, Labeo gonius and Cirrhinus reba) collected from different fresh water bodies of Rajshahi district, Bangladesh during March 2007 to February 2008. A total of 480 host fishes were examined of which 370 fishes were infected by 4 protozoan (Trichodina sp., Ichthyophthirius sp., Apiosoma sp. and Chilodonella sp.), 2 monogenean (Gyrodactylus sp. and Dactylogyrus sp.), 2 crustacean (Argulus sp. and Larnaea sp.), 1 digenean (Fellodistomum sp.) and 1 nematoda (Camallanus sp.) parasitic species. These parasites were isolated from body slime, gills and intestine of the infected fishes. Among the isolated parasites Fellodistomum sp. was found as the highest and Chilodonella sp. was found as the lowest in number. Our results indicate that infection and infestation rate of parasites varied with fish size and season and found to be high in the post-monsoon and winter periods (November-March), when fish are most susceptible to parasites. © 2012 Academic Journals Inc.
Hossain M.Y.,University of Rajshahi |
Islam R.,University of Rajshahi |
Hossen M.A.,University of Rajshahi |
Rahman O.,University of Rajshahi |
And 3 more authors.
Ribarstvo, Croatian Journal of Fisheries | Year: 2015
Long whiskers catfish Mystus gulio is a commercially important food fish in Asian countries. But natural population is decreasing due to over-exploitation and various ecological changes in its natural habitats. This paper suggests the steps for the conservation of the remnant isolated population of M. gulio in Asian countries. ©The Author(s) 2015.
Salam M.A.,Bangladesh Agricultural University |
Shahjahan Md.,Bangladesh Agricultural University |
Sharmin S.,Bangladesh Agricultural University |
Haque F.,Bangladesh Agricultural University |
Rahman M.K.,Bangladesh Fisheries Research Institute
Pakistan Journal of Zoology | Year: 2015
Toxicological effect of an organophosphorous pesticide sumithion was studied in common carp, Cyprinus carpio. Acute toxicity of sumithion (96 h LC50 value 8.05 ppm) was first determined. Then the fish were exposed to three sub-lethal concentrations (0.8, 1.6 and 3.2 ppm) of sumithion for 24, 48, 72, and 96 h, at the end of which blood glucose levels and hematological parameters were analyzed. The blood glucose level increased significantly in higher concentrations (1.6 and 3.2 ppm) compared to control (0 ppm) during the toxicity of sumithion. On the other hand, the hemoglobin, RBC and hematocrit values declined significantly with the increasing concentration of sumithion. The MCV and MCH showed significant increases in higher concentrations. The present investigation revealed that sumithion has adverse effects on the biochemical and hematological parameters, which might alter physiological functions in the fish body. Copyright 2015 Zoological Society of Pakistan.
Siddiquee A.,Bangladesh Agricultural University |
Rashid H.,Bangladesh Agricultural University |
Islam M.A.,Bangladesh Fisheries Research Institute |
Ahmed K.K.U.,Bangladesh Fisheries Research Institute |
Shahjahan M.,Bangladesh Agricultural University
Journal of Fisheries and Aquatic Science | Year: 2015
The reproductive biology of an endangered fish species great snakehead (Channa marulius) was studied by gonadosomatic index (GSI) and histological analysis of ovaries and testis. Fishes were collected from the haor areas of greater Sylhet basin for a period of July 2011 to June 2012. For female the highest GSI (0.42) was in July and the lowest (0.018) was in January and March. Similarly, for male the highest GSI (0.056) was in July and the lowest (0.018) was in January. In the histological study, the premature (PM) and mature (M) stages of oocytes were observed in the ovaries of fish collected in June to July. The ovaries contained developing oocytes oogonia (OG) and perinuclear oocytes (PNO) in the August and subsequent month samples which were mostly spent. In testis high proportions of mature germ cells spermatids (SPT) and spermatozoa (SPZ) were observed in the July samples of C. marulius. In parallel to GSI, both the ovary and testis develop and mature synchronously. The present findings indicated that Channa marulius from Sylhet basin attains peak reproductive maturity in the month of June and July which revealed the breeding season of this species. © 2015 Academic Journals Inc.
Rahman M.A.,University Putra Malaysia |
Zaher M.,Bangladesh Fisheries Research Institute |
Azimuddin K.M.,Bangladesh Fisheries Research Institute |
Yeasmine S.,Bangladesh Fisheries Research Institute |
And 2 more authors.
Aquaculture Research | Year: 2013
The fingerling-rearing experiment of the threatened catfish, Mystus cavasius was carried out at different stocking densities in earthen nursery ponds. Twelve-day-old fry were stocked at 200 000 ha-1 in treatment-1 (T1), 250 000 ha-1 in treatment-2 (T2) and 300 000 ha-1 in treatment-3 (T3) respectively. The mean length and weight of fry at stocking was 1.24 ± 0.25 cm and 0.11 ± 0.04 g respectively. Fry in all the experimental ponds were supplemented with SABINCO nursery feed for the first 14 days and starter-I feed for days 15-56. The physico-chemical parameters and plankton population of pond water were within the suitable level for fish culture. Growth in terms of final weight, final length, weight gain, length gain and specific growth rate and survival of fingerlings were significantly higher in T1 than those in T2 and T3. Feed conversion rate was significantly lower in T1 followed by T2 and T3 in that order. Significantly higher number of fingerlings was produced in T3 than that in T2 and T1. Even then, consistently higher net benefits were obtained from T1 than those from T3 and T2. Among the treatments evaluated, 200 000 fry ha-1 was the best stocking density considering the highest growth, production and net benefits of fingerlings of M. cavasius in nursery ponds. © 2013 John Wiley & Sons Ltd.
Rahman M.A.,University Putra Malaysia |
Azimuddin K.M.,Bangladesh Fisheries Research Institute |
Yeasmine S.,Bangladesh Fisheries Research Institute
Journal of the World Aquaculture Society | Year: 2011
Polyculture of olive barb with indigenous major carps was carried out for 8 mo at different densities in earthen ponds. All the experimental ponds were stocked with fingerlings of major carps viz., catla, Catla catla, and rohu, Labeo rohita, at the rate of 3750/ha each. In addition, olive barb, Puntius sarana, was stocked at the rate of 10,000, 12,500, and 15,000 fingerlings/ha in treatment-1 (T1), treatment-2 (T2), and treatment-3 (T3), respectively. Fish in all the ponds were fed with supplementary feed comprising of rice bran (70%), mustard oil cake (25%), and fish meal (5%) at the rate of 3-6% of the estimated body weight. Physicochemical parameters and plankton populations of pond water were within the acceptable range for fish culture. The mean final weight, weight gain, and specific growth rate of catla were very similar in all the treatments while those for rohu and olive barb were significantly higher in T1 than in T2 and T3. The gross and net productions in T1 were significantly higher than in T2 and T3. The net benefit was also highest in T1 followed by T2 and lowest in T3. Under the conditions of this experiment, growth, production, and benefits were greatest at a stocking density of olive barb at 10,000/ha in polyculture with other major carps. © by the World Aquaculture Society 2011.
Aminur Rahman M.,Bangladesh Fisheries Research Institute |
Marimuthu K.,AIMST University
Advances in Environmental Biology | Year: 2010
An experiment was carried out for 8 weeks in nine earthen nursery ponds having an area of 0.004 ha with an average depth of 0.8 m each. Three different stocking densities were tested with three replicates. Four-dayold hatchling of the native climbing perch (Anabas testudineus) stocked at 1.0 million/ha was designated as treatment-1 (T1), 1.2 million/ha as treatment-2 (T2) and 1.4 million/ha as treatment-3 (T3), respectively. At stocking, all hatchlings were of the same age group and batch-rearing with a mean length and weight of 0.44± 0.05 cm and 0.14 ± 0.05 mg, respectively. Hatchlings in all the nursery ponds were fed SABINCO commercial nursery feed (32.06% crude protein) for 8 weeks. The rate of feeding was 14% of the estimated body weight of hatchling for the first two weeks, 12% for the second two weeks, 10% for the third two weeks and 8% for the fourth two weeks. The water quality parameters and plankton abundance of pond water were monitored weekly and were within the acceptable range for fish culture. Growth performances (final weight, final length, weight gain, length gain and specific growth rate) and survival of fingerlings in T1 (1.0 million hatchling/ha) were significantly higher than those in T2 (1.2 million/ha) and T3 (1.4 million/ha), respectively. Feed conversion ratio (FCR) was significantly lowest in T1 followed by T2 and highest in T3. Significantly higher number of fingerlings was produced in T3 followed by T2 and T1 respectively. Despite lower production of fingerlings, consistently higher net benefits were obtained from T1 than those from T2 and T3. In the present experiment based on the highest growth, survival, production and net benefits of the fingerlings of A. testudineus with three treatments in nursery ponds, 1.0 million hatchling/ha (T1) appears to be the best stocking density. © 2010, American-Eurasian Network for Scientific information.
Hussain M.G.,Bangladesh Fisheries Research Institute
Aquatic Ecosystem Health and Management | Year: 2010
Fisheries play an important role in nutrition, income, employment and export earnings in Bangladesh. Fishes contribute to 63% of animal protein intake, about 5% of gross domestic product and 5% of export earnings; approximately 1.4 million people are directly engaged in fishing, 11 million in part-time fishing and another 3 million in aquaculture activities. The fisheries are highly diversified and comprised of inland open water capture fisheries, inland closed water culture fisheries and marine fisheries, which contribute respectively 35%, 44% and 21% to total fish production of 2.1 million tonnes. The major environmental factors having negative impacts on fisheries development are mainly: human impacts on riverine morphology, disruption of ecology, intensive agriculture, and modern developments. Fish conservation acts and regulations exist, but enforcement is difficult because of prevailing socio-economic conditions. Few regulatory mechanisms presently exist for protecting aquaculture environments. Production from inland openwater capture fisheries is declining due to over-exploitation and habitat degradation. However, aquaculture production, which mostly follows traditional practices, has been steadily increasing. Fisheries research has made significant contributions to the large growth of aquaculture through generating a number of economically viable, socially acceptable and environmentally compatible technologies being used by different categories of farmers, large and small. Presently, formulation and implementation of strategies and policies for conservation and sustainable management of degraded aquatic habitats have been immensely effective along with the generation and wider application/dissemination of suitable aquaculture and management technologies, which are expected to ensure the conservation of aquatic genetic resources. This paper reviews all these subjects and emphasizes future needs for development and implementation of policies/regulations at the national level, before it becomes too late to conserve valuable aquatic biodiversity and their habitats. © 2010 AEHMS.