Systems of Polyculture of Fishes in the Inland Waters of India

1976 ◽  
Vol 33 (4) ◽  
pp. 905-910 ◽  
Author(s):  
V. G. Jhingran
Keyword(s):  
Mixed Culture ◽  
Labeo Rohita ◽  
Scientific Management ◽  
Catla Catla ◽  
Brackish Waters ◽  
Water Fish ◽  
Cultivated Species ◽  
The Cost ◽  
Brackish Water Fish ◽  
Different Parts

Different systems of polyculture of fishes are traditionally practiced in India to utilize various types of inland water resources available in the country. The usually cultivated species of fish in freshwater polyculture are Catla catla, Labeo rohita, and Cirrhinus mrigala. Culture of Chinese carps along with major Indian carps has recently been developed in India as composite fish culture, and with this, production as high as 3000–5800 kg/ha per 6 mo and 7000–9000 kg/ha per yr has been obtained in still-water ponds in different parts of the country. The magnitude of production is significant considering its application to the large resource of ponds and tanks totaling about 1.6 million ha, thoughonly 1 million ha are presently available for carp culture. The remaining 0.6 million ha comprise swamps and derelict waters. The cost of swamp reclamation being high, techniques of mixed culture of air-breathing fishes are being developed to utilize these water bodies as such and already a production of 895 kg/ha per yr of murrels has been attained without any fertilization and supplementary feeding. Further, to utilize about 2.0 million ha of culturable brackish waters available in India, research investigations are well underway to manipulate the tidal impoundments for mixed culture of brackish water fish and prawns with proper scientific management.

The taxonomy and growth of aCrypthecodiniumspecies (Dinophyceae) isolated from a brackish-water fish aquarium

2006 ◽  
Vol 28 (2) ◽  
pp. 185-191 ◽  
Author(s):  
MW Parrow ◽  
M Elbrächter ◽  
MK Krause ◽  
JM Burkholder ◽  
NJ Deamer ◽  
...  
Keyword(s):  
Brackish Water ◽  
Water Fish ◽  
Brackish Water Fish

scholarly journals Status of formalin in commercially important fishes from the northeastern region of Bangladesh

2020 ◽  
Vol 32 (1) ◽  
pp. 23-28
Author(s):  
TOFAEL AHMED SUMON ◽  
MD. ASHRAF HUSSAIN ◽  
FARJANA AKHTER MITA ◽  
JOYANTA BIR ◽  
SARKER MOHAMMED IBRAHIM KHALIL
Keyword(s):  
Labeo Rohita ◽  
Industrial Research ◽  
Catla Catla ◽  
Northeastern Region ◽  
Significant Difference ◽  
Fish Samples ◽  
The Status ◽  
Commercially Important ◽  
Tenualosa Ilisha

The study revealed the status of formalin used in four commercially important fishes namely Rohu (Labeo rohita), Catla (Catla catla), Mrigal (Cirrhinus cirrhosus) and Hilsa (Tenualosa ilisha) from Sylhet and Moulvibazar district for a period of four months from April to July 2016. A total of 100 fish samples from different town and village markets were collected and analyzed instantly on the market to detect the presence of formalin by using a kit developed by Bangladesh Council of Scientific and Industrial Research (BCSIR). Among the analyzed fishes 46.7, 26.7, 20.0 and 13.3% of Rohu, Catla, Mrigal and Hilsa, respectively were found treated with formalin from Sylhet district. Similarly, formalin was also detected in 40, 20, 20 and 20% of investigated Rohu, Catla, Mrigal and Hilsa from Moulvibazar district, individually. There was no significant difference in formalin used between town and village market, whereas a significant difference in application of formalin in domestic and imported fishes except Catla has been identified. Two-third of imported Rohu (66.7%) was found formalin positive followed by Hilsa (44.4%), Mrigal (40%) and Catla (35.7%). Amongst the domestic fishes, presence of formalin was detected in 27.8, 18.8, 10.0 and 4.8% in Rohu, Catla, Mrigal and Hilsa, separately. This devastating use of formalin in food fishes should be banned through proper enactment of the existing laws of the country, as well as timely and appropriate implementation of government monitoring is mandatory to combat the unethical formalin use.

scholarly journals Gill net Selectivity and Fishing Pressure on Indian Major Carp in Thirumoorthy Reservoir, Tamil Nadu

2016 ◽  
Vol 11 (2) ◽  
pp. 554-559 ◽  
Author(s):  
R Velmurugan ◽  
N Neethiselvan ◽  
B Sundaramoorthy ◽  
Xavier Rayan ◽  
Kalidoss Radhakrishnan ◽  
...  
Keyword(s):  
Tamil Nadu ◽  
Labeo Rohita ◽  
Monsoon Season ◽  
Catla Catla ◽  
Fishing Pressure ◽  
Catch Per Unit Effort ◽  
Indian Major Carp ◽  
Gill Net ◽  
Dominant Fish ◽  
Post Monsoon Season

In present study attempts has been made to document the fishing crafts and gears which operated in Thirumoorthy reservoir, Tamil Nadu. This investigation revealed, the post monsoon season had higher catch per unit effort of 11kg/boat/day by gillnet fishing and about 20 to 30kg/day in cast net. Catla catla has the dominant fish species and accounted about 58% followed by Cirrhinus mrigala (29%), Labeo rohita (12%) and Cyprinus carpio (2%) against the total landings. However, three species including the Tilapia, Rohu and Mrigala were found to constitute fishery in the cast net with mean CPUE of 20 to 30 kg per day.

scholarly journals Fry production, induced breeding practices and cost-profit analysis of the hatcheries of Rajshahi district in Bangladesh

2014 ◽  
Vol 2 (3) ◽  
pp. 209
Author(s):  
Naima Aktar ◽  
Abdus Salam Bhuiyan ◽  
M Nazrul Islam
Keyword(s):  
Labeo Rohita ◽  
Ctenopharyngodon Idella ◽  
Catla Catla ◽  
Hatching Rate ◽  
Hypophthalmichthys Molitrix ◽  
Total Cost ◽  
Profit Analysis ◽  
Net Profit ◽  
Profit Status ◽  
Breeding Practices

This study was conducted on the 13 hatcheries of Rajshahi district from March to December 2013 to know about the fry production status, induced breeding practices and cost-profit status. Average fry production of Labeo rohita, 93.38±83.32 kg, Catla catla, 62.00±60.84 kg, Cirrhinus cirrhosus, 77.46±58.61 kg, L. calbasu, 14.20±14.60 kg, L. bata, 53.73±50.56 kg, L. gonia, 10.00±0 kg, Heteropneustes fossilis, 5.00±0 kg, Clarias batrachus, 20.00±0 kg, Hypophthalmichthys molitrix, 149.77±138.45 kg, Aristichthys nobilis, 104.54±148.11 kg, Ctenopharyngodon idella, 19.20±15.35 kg, Cyprinus carpio 108.08±77.39 kg and Barbonymus gonionotus, 23.10±14.04 kg were recorded in the surveyed hatcheries. Two types of hormone injections PG (pituitary gland) and HCG (Human chorionic gonadotropin) were used for induced breeding. The rate of 1st dose of injection of PG varied from 1 to 2 mg/kg and HCG from 100-150 IU/kg and the rate of 2nd dose of injection of PG varied between 5 and 8 mg/kg. The incubation period and hatching rate in different fish species varied from 10 to 72 hours and 55% to 80%, respectively. The average total cost, gross return and net profit of the hatcheries were 0.667±0.798, 1.152±1.636 and 0.485±0.846 million BDT respectively.

scholarly journals Polychlorinated Biphenyls in Brackish Water Fish in the River Niger, Nigeria

2018 ◽  
Vol 8 (17) ◽  
pp. 31-42 ◽  
Author(s):  
John P. Unyimadu ◽  
Oladele Osibanjo ◽  
Joshua O. Babayemi
Keyword(s):  
Water Quality ◽  
Polychlorinated Biphenyls ◽  
Brackish Water ◽  
World Health ◽  
Fresh Weight ◽  
Fish Samples ◽  
Water Fish ◽  
Mean Concentration ◽  
River Niger ◽  
Brackish Water Fish

Background. Anthropogenic polychlorinated biphenyls (PCBs) in aquatic environments poses human and ecological health risks in Nigeria. Objectives . This study determined the concentrations of PCBs in brackish water fish in the River Niger to assess the contamination status of fish consumed by the local population. Methods . The sampled fish species included Drepane africana, Mochokus niloticus, Chrysichthys nigrodigitatus, Pristipoma jubelini, Vomer septapinis, Pseudotolithus senegalensis, Mugil cephalus, Pseudotolithus elongatus, Sphyraena piscatorum and Lutjanus goreensis, purchased from landing sites. Six fish from each species were sampled, for a total of 60 samples. Twenty-seven (27) PCB congeners, #8, #18 #28, #44, #52, #60, #77, #81, #101, #105, #114, #118, #123, #126, #128, #138, #153, #156, #157, #167, #169, #170, #180, #185, #189, #195, and #206 were screened in the fish samples using standard methods. The PCBs were identified and quantified using gas chromatography (GC) (Hewlett Packard GC 5890 series 11 with electron capture detector). Confirmation was performed using Shimadzu GCMS QP2010. Results. The sum of the National Oceanic and Atmospheric Administration Agency (ΣNOAA) PCBs occurred at the highest concentration of 1830.0±484.0 μg/kg detected in Vomer septapinis, and the lowest in Pseudotolithus senegalensis, with a mean concentration of 795±169.3 μg/kg. The concentration of dioxin-like (DL) PCBs was highest in Pristipoma jubelini (992.0±88.6 μg/kg) and lowest (285.6±81.5 μg/kg) in Drepane africana. The highest mean concentration (418.±177.6 μg/kg) of International Council for the Exploration of the Seas-7 (ICES-7) PCBs was observed in Vomer septapinis. The heavier ICES-7 congeners PCB-138, PCB-153, and PCB-180 occurred at higher concentrations compared to the lighter molecular weight ICES-7: PCB-28, PCB-52, and PCB-101. The European Union (EU) marker PCB limit of 335 μg/kg was exceeded in all the brackish water fishes with the exception of Mochokus niloticus, Pristipoma jubelini and Pseudotolithus senegalensis. Discussion . The total level of PCBs in the brackish fish samples was relatively high at >1000 μg/kg (above the World Health Organization (WHO) and Food and Agriculture Organization of the United Nations (FAO) guideline of 1000 μg/kg fresh weight). The EU guideline value for fish (220 μg/kg fresh weight) was exceeded in about 80% of the brackish fish samples studied. Conclusions. Consumption of fish from the River Niger may expose humans to polychlorinated biphenyls. In addition, since contamination of the fish samples is an indication of river contamination, river water quality is of great concern and there is a need for additional PCB data on water quality to be distributed to the community, followed by mitigation measures. Competing interests. The authors declare no competing financial interests.

scholarly journals A baseline taxonomic study of zooplankton in the lower Halda River, Bangladesh

2020 ◽  
pp. 001-008
Author(s):  
Bhuyan Md. Simul
Keyword(s):  
Labeo Rohita ◽  
Zooplankton Community ◽  
Tidal River ◽  
Catla Catla ◽  
Taxonomic Study ◽  
Indian Major Carps ◽  
The World ◽  
Natural Breeding ◽  
Major Carps

Halda is a unique resourceful tidal river of Bangladesh, where Indian major carps (Catla catla, Labeo rohita, Cirhinnus mrigala, and Labeo calbasu) spawn from April to June. Ecological conditions are auspicious from time immemorial which serves as a natural breeding ground in the world. The present study was conducted over the period of January-June 2017 to identify the main species of Zooplankton fauna and also fi nd out the dominancy of the highest plankton groups in the lower Halda River. A total of 3 major zooplankton groups-Copepoda, Rotifera and Cladocera were identifi ed during the six months period. A total of 35 species under 4 family showing the dominancy for the class Rotifera consisting of 7 genera were recorded from fi ve sampling sites. The lowest group was Cladocera consisting of 5 genera. The composition and dominance of the zooplankton community among fi ve different sites in the lower Halda River showed some close inter-relationships. The present study suggests for conducting further research to know the overall conditions and to make a complete list of available zooplankton fauna that exert impact on the water quality of the Halda River.

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