scholarly journals Monogenetic trematodes infestations in Indian major carps of Mymensingh region

2016 ◽  
Vol 3 (1) ◽  
pp. 187-194 ◽  
Author(s):  
David Rintu Das ◽  
Shankar Majumder ◽  
Kirtunia Juran Chandra
Keyword(s):  
Water Quality ◽  
Management Practices ◽  
Quality Parameters ◽  
Fish Host ◽  
Water Quality Parameters ◽  
Catla Catla ◽  
Fish Farms ◽  
Indian Major Carps ◽  
Species Specific ◽  
Major Carps

A study was conducted to investigate the infestations of monogenetic trematodes of juvenile carps of Mymensingh region. A total of eight (8) farms, four Government (Govt.) and four Private (Pvt.) fish farms were investigated of Indian major carps - Catla (Catla catla), Rui (Labeo rohita) and Mrigal (Cirrhinus cirrhosus) during June, 2010 to May, 2012. Monthly samplings were carried out with 5 fishes of each species and each farm. Altogether 2880 fish host were examined of which 1424 hosts were found to be infested with monogenetic trematodes of which 626 from Govt. and 798 from Pvt. farms. The monogeneans were very common in gills of all fishes. Water quality parameters were taken and management practices were also noted. The risk of infestation by monogeneans of carp significantly (p<0.001) increased when the water quality parameters were deteriorated. Prevalence (%), mean intensity and abundance were found to be species specific and also varied with seasons and management systems practiced by different farmers. Prevalence (%) of monogeneans in carps was significantly (p< 0.001) higher in Pvt. farm than that of Govt. farms. The prevalence (%) of monogeneans were significantly (p< 0.01) higher in rainy season than dry season. Mrigal was more infected by monogeneans followed by Catla and Rui.Res. Agric., Livest. Fish.3(1): 187-194, April 2016

scholarly journals ARGULUS OF INDIAN MAJOR CARPS IN SELECTED FISH FARMS OF MYMENSINGH

2017 ◽  
Vol 14 (2) ◽  
pp. 243-250
Author(s):  
D. R. Das ◽  
S. Majumder ◽  
K. J. Chandra
Keyword(s):  
Water Quality ◽  
Management Practices ◽  
Quality Parameters ◽  
Fish Host ◽  
Catla Catla ◽  
Optimum Level ◽  
Fish Farms ◽  
Indian Major Carps ◽  
Species Specific ◽  
Major Carps

Studies were conducted to investigate the infestations of Argulus of juvenile carps of Mymensingh region.  A total of 8 farms, four Government (Govt.) and four Private (Pvt.) fish farms were investigated Indian major carps - Catla (Catla catla), Rui (Labeo rohita) and Mrigal (Cirrhinus cirrhosus) during June, 2010 to May, 2012. Monthly samplings were carried out with 5 fish from each species and each farm. Altogether 2880 fish host were examined of which 940 hosts were found to be infested with Argulus during the study period. The Argulus were very common in body surface, base of the pelvic, pectoral, anal, caudal fin, muscle and mouth cavity of all fishes. Water quality and management practices were recorded in different farms. The risk of infestation by Argulus in carps significantly (p<0.001) increased when the water quality parameters were not maintained the optimum level. Prevalence (%), mean intensity and abundance were found to be species specific and also varied with seasons and management systems. Prevalence (%) of Argulus in carps was significantly (p< 0.001) higher in Pvt. farm than that of Govt. farms. The   prevalence (%) of Argulus were significantly ( p< 0.01) higher in rainy season. Rui was more susceptible than Catla and Mrigal by Argulus.

scholarly journals ECTO- PARASITISM IN JUVENILE INDIAN MAJOR CARPS OF DIFFERENT FISH FARMS OF MYMENSINGH

2017 ◽  
Vol 14 (2) ◽  
pp. 257-262
Author(s):  
D. R. Das ◽  
S. Majumder ◽  
K. J. Chandra
Keyword(s):  
Labeo Rohita ◽  
Quality Parameters ◽  
Management Systems ◽  
Catla Catla ◽  
Fish Farms ◽  
Indian Major Carps ◽  
Species Specific ◽  
Fish Hosts ◽  
Major Carps ◽  
Eleven Species

An investigation was made on the ecto-parasitism of juvenile carps of Mymensingh region.  Eight  farms, four Government (Govt.) and four Private (Pvt.) fish farms were investigated for Indian major carps(Catla catla, Labeo rohita and Cirrhinus cirrhosus)  (Catla, Rui and Mrigal)  during  June, 2010 to May, 2012. Monthly samplings were carried out with 5 fish from each species and each farms. Altogether 2880 fish hosts were examined of which 1674 were found to be infested with different groups of parasites during the study period. The ectoparasites were very common in gill, skin, mouth cavity, muscle, base of the pelvic, pectoral, anal, caudal fin and body surface of all fishes. Eleven species of protozoan, thirteen species of  monogeneans and two species of argulus were recorded. The risk of being infestation by parasites in carps significantly (p<0.001) increased when the water quality parameters were deteriorated. Prevalence (%), mean intensity and abundance were found to be species specific and also varied with seasons and management systems practiced by different farmers. Prevalence (%) of ecto-parasites in carps was significantly (p< 0.001) higher in Pvt. farm than that of Govt. farms and was significantly (p< 0.01) higher in rainy season. Rui was more susceptible than Catla and Mrigal.

scholarly journals INVESTIGATION OF DISEASES OF JUVENILE CATLA FROM CULTURE POND FARMING CONDITION IN MYMENSINGH

2017 ◽  
Vol 15 (1) ◽  
pp. 71-80
Author(s):  
D. R. Das ◽  
K. J. Chandra
Keyword(s):  
Water Quality ◽  
Management Practices ◽  
Pathological Condition ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Catla Catla ◽  
Optimum Level ◽  
Fish Farms ◽  
Liver And Kidney ◽  
Histopathological Studies

Investigation on health conditions and diseases of juvenile catla (Catla catla) was carried out for clinical and histopathological observations from different farms of Mymensingh region.  A total of eight (8) farms, four Government (Govt.) and four Private (Pvt.) fish farms were selected for the study. The Indian major carp - catla was examined during June, 2010 to May, 2012. Monthly samplings were carried out with 5 fishes from each farm. Altogether 960 fish hosts were examined during the study period. Water quality parameters such as temperature, dissolved oxygen, pH, ammonia, hardness, alkalinity, transparency and depth of water etc. were taken and management practices were investigated fortnightly interval. These were almost similar for all experimental ponds. The risk of being infestation by parasites of catla significantly (p<0.001) increased when the water quality parameters were not maintained the optimum level. Clinical examination of fishes was also carried out for any kind of abnormalities at monthly intervals. For histopathological studies skin, muscle, gill, liver and kidney were collected, processed and stained in Haematoxylin and Eosin. Histologically, catla of different fish farms were more affected in colder months (October to January). Structures of fish organs were normal from March to July. In the months of September, minor pathologies were found to be started and in the months of February the pathological condition of fish gradually reduced. Pathological changes like necrosis, fungal granuloma, protozoan and monogenean cyst, vacuolation, melanomacrophase, haemorrhage, hypertrophy, hyperplasia and clubbing were recorded in all the investigated organs. Among them fish gills and skin were more affected followed by liver and kidney. Again when considered individual fish farm, fish of Pvt. Fish farms were more affected than others. The study showed that severity of clinically and pathologically changes were gradually increased in November to January. During the period mixed infection of protozoa, monogenea and argulus were noticed in catla of the investigated farms.

scholarly journals Prevalence of Ectoparasitic Infestation in Indian Major Carps During Winter at Different Blocks of South 24-Parganas District, West Bengal, India

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Koel Bhattacharya Sanyal
Keyword(s):  
Management Practices ◽  
West Bengal ◽  
Monsoon Season ◽  
Quality Parameters ◽  
Catla Catla ◽  
Key Factors ◽  
Post Monsoon ◽  
Indian Major Carps ◽  
Post Monsoon Season ◽  
Major Carps

The study was carried out to find the prevalence of ectoparasites in carp species specifically Indian Major Carps (IMC) during the post monsoon season (November’16 to March’17). Four groups of ectoparasites viz. myxozoan, ciliophoran, monogenean and crustacean were recorded from approximately 500 number of  carp species like, Labeo rohita, Catla catla, Cirrhinus mrigala and Labeo calbasu collected from different ponds of selected blocks of South 24 Parganas district of West Bengal. The highest prevalence (64.76%) of infestation had been recorded by Myxozoans and the lowest was by Monogeneans (4.79%). The highest and lowest ectoparasitic prevalence in carp was observed in L. rohita (32.88%) and C. catla (27.28%). At the end of this experiment it was concluded that sudden changes in water quality parameters, over stocking, lack of management practices and some other aspects were the key factors for disease occurrences in this post monsoon season.

scholarly journals Comparison of Forecasting Models for Real-Time Monitoring of Water Quality Parameters Based on Hybrid Deep Learning Neural Networks

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1547
Author(s):  
Jian Sha ◽  
Xue Li ◽  
Man Zhang ◽  
Zhong-Liang Wang
Keyword(s):  
Neural Network ◽  
Water Quality ◽  
Deep Learning ◽  
Real Time ◽  
Best Management Practices ◽  
Input Data ◽  
Management Practices ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Real Time Monitoring

Accurate real-time water quality prediction is of great significance for local environmental managers to deal with upcoming events and emergencies to develop best management practices. In this study, the performances in real-time water quality forecasting based on different deep learning (DL) models with different input data pre-processing methods were compared. There were three popular DL models concerned, including the convolutional neural network (CNN), long short-term memory neural network (LSTM), and hybrid CNN–LSTM. Two types of input data were applied, including the original one-dimensional time series and the two-dimensional grey image based on the complete ensemble empirical mode decomposition algorithm with adaptive noise (CEEMDAN) decomposition. Each type of input data was used in each DL model to forecast the real-time monitoring water quality parameters of dissolved oxygen (DO) and total nitrogen (TN). The results showed that (1) the performances of CNN–LSTM were superior to the standalone model CNN and LSTM; (2) the models used CEEMDAN-based input data performed much better than the models used the original input data, while the improvements for non-periodic parameter TN were much greater than that for periodic parameter DO; and (3) the model accuracies gradually decreased with the increase of prediction steps, while the original input data decayed faster than the CEEMDAN-based input data and the non-periodic parameter TN decayed faster than the periodic parameter DO. Overall, the input data preprocessed by the CEEMDAN method could effectively improve the forecasting performances of deep learning models, and this improvement was especially significant for non-periodic parameters of TN.

scholarly journals Multivariate statistical approaches to benthic macroinvertebrates and water quality for farming impact assessment in Selangor River, Malaysia

2021 ◽  
Author(s):  
Nadeesha Dilani Hettige ◽  
Rohasliney Binti Hashim ◽  
Zulfa Hanan Ash’aari ◽  
Ahmad Abas Kutty ◽  
Nor Rohaizah Jamil
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Oxygen Demand ◽  
Fish Farming ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Ammoniacal Nitrogen ◽  
Fish Farms ◽  
Organic Contamination ◽  
Multivariate Statistical

Abstract This study examined the influence of fish farming activities on water quality and benthic macroinvertebrates at the Rawang sub-basin of Selangor River. Multivariate statistical techniques were used to determine major influencing water quality parameters causing organic contamination and the dominant pollution-tolerant benthic macroinvertebrates. Sampling was conducted at Guntong River (SR1), Guntong River’s tributary (SR2, the control site), Kuang River (SR3 and SR6), Gong River (SR4), and Serendah River (SR5) using random sampling techniques based on accessibility and proximity to fish farms. Benthic macroinvertebrates and water samples were collected from April 2019 to March 2020. Based on the principal components analysis (PCA), electrical conductivity (EC), dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), ammoniacal-nitrogen, and total suspended solids (TSS) were major water quality parameters influenced by fish farming activities. The Canonical Correspondence Analysis (CCA) revealed that several taxa of benthic macroinvertebrates (Chironomidae, Naididae, Lumbriculidae, Tubificidae, unidentified Oligochaeta, Leeches (Helobdella sp.), Planorbidae, and some Odonata) were moderately or highly sensitive to TSS, BOD, COD, turbidity, ammoniacal-nitrogen, and EC. These taxa were dominant in the sampling sites, which were close to fish farms. Findings in this study showed that fish farming activities impacted the water quality and benthic macroinvertebrates in this sub-basin.

scholarly journals Investigation on changing pattern of health status of juvenile Hypophthalmichthys molitrix from farming systems in Bangladesh

2016 ◽  
Vol 4 (3) ◽  
pp. 420
Author(s):  
Kamal Gosh ◽  
Gias Uddin Ahmed ◽  
Mst Nahid Akter
Keyword(s):  
Water Quality ◽  
Health Status ◽  
Clinical Signs ◽  
Quality Parameters ◽  
Fish Farm ◽  
Water Quality Parameters ◽  
Hypophthalmichthys Molitrix ◽  
Fish Farms ◽  
Monthly Basis ◽  
Liver And Kidney

An experiment was carried out to investigate the health status of Hypophthalmichthys molitrix among three different fish farms at Mymensingh district of Bangladesh. Fish sampling and water quality parameters were collected on a monthly basis. Samples of skin, muscle, gills, liver and kidney were examined through histological technique. Results from water quality parameters suggested that water temperature had a distinct effect on fish health of H. molitrix, which was mostly evident during the colder months. Infectious symptoms were usually evident in July to October and the severity of pathology was increased in November and December. These were evident from their clinical signs that include scale loss, haemorrhagic lesion, and reddish spots or from their histopathological symptoms such as necrosis, pyknosis, inflammation, haemorrhage, hypertrophy, missing of gill lamellae, vacuums, tubular and pillar cells degeneration, inflammation, clubbing, and suspected bacterial colonies. Results suggest that the health condition of the fishes from BAU fish farm was the best over the other two farms, whereas Government fish farm followed by NGO fish farm were severely affected with EUS, protozoan and bacterial infection. Moreover, internal organs like liver and kidney were more affected than skin, muscle and gills.

scholarly journals SEASONAL VARIATION OF GILL, SKIN, MUSCLE, LIVER AND KIDNEY PATHOLOGY OF MRIGAL (Cirrhinus cirrhosus) IN CULTURAL POND FISHERIES, MYMENSINGH, BANGLADESH

2018 ◽  
Vol 16 (1) ◽  
pp. 121-129
Author(s):  
D. R. Das ◽  
K. J. Chandra
Keyword(s):  
Water Quality ◽  
Seasonal Variation ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Optimum Level ◽  
Fish Farms ◽  
Bacterial Colony ◽  
Kidney Pathology ◽  
Liver And Kidney ◽  
Gill Lamellae

An investigation on the seasonal variation of gill, skin muscle, liver and kidney pathology of Mrigal (Cirrhinus cirrhosus) was carried out from four Government (Govt.) and four Private (Pvt.) fish farms, Mymensingh, Bangladesh during June, 2010 to May, 2012. Fish sampling and water quality parameters were monitored monthly basis. For histopathological studies skin, muscle, gill, liver and kidney were collected, processed and stained in Haematoxylin and Eosin.  Histologically, Mrigal of different fish farms were more affected in colder months. All the investigated organs of Mrigal were exhibited few abnormalities during summer, however, mild hyperplasia, haemorrhage, partial loss of secondary gill lamellae, marked and hypertrophy was observed during the rainy season. Several pathological changes like necrosis, fungal granuloma, protozoan and monogenean cyst, vacuolation, melanomacrophase, haemorrhage, hypertrophy, hyperplasia and clubbing were recorded in all the investigated organs. Among them fish gills and skin were more affected followed by liver and kidney. In some cases, large bacterial colony and protozoan cyst were observed in the secondary gill lamellae of Mrigal. The ectoparasites were very common in gills and skin of all fishes. Water quality parameters were taken and management practices were investigated fortnightly interval in different farms. These were almost similar for all experimental ponds. The risk of being infestation by parasites of carp significantly (p<0.001) increased when the water quality parameters such as temperature, dissolved oxygen, pH, ammonia, hardness, alkalinity, transparency and depth of water etc. were not maintained the optimum level.

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