Effect of different levels of water salinity on the decomposition of organic manures in a brackish water fish pond soil

Hydrobiologia ◽  
1980 ◽  
Vol 72 (3) ◽  
pp. 287-292 ◽  
Author(s):  
G. N. Chattopadhyay ◽  
L. N. Mandal
Keyword(s):  
Brackish Water ◽  
Water Salinity ◽  
Fish Pond ◽  
Organic Manures ◽  
Water Fish ◽  
Different Levels ◽  
Brackish Water Fish

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 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 Erratum to: Bio-transfer factors and temporal variation of heavy metals in different sexes of 3 species of edible brackish water fish

2017 ◽  
Vol 24 (22) ◽  
pp. 18691-18691
Author(s):  
Ranil Kavindra Asela Kularatne ◽  
Jalaldeen Mohamed Harris ◽  
Periyathamby Vinobaba ◽  
Champika Ellawala Kankanamge
Keyword(s):  
Heavy Metals ◽  
Temporal Variation ◽  
Brackish Water ◽  
Transfer Factors ◽  
Water Fish ◽  
Brackish Water Fish

Bio-transfer factors and temporal variation of heavy metals in different sexes of three species of edible brackish water fish

2017 ◽  
Vol 24 (22) ◽  
pp. 18680-18690 ◽  
Author(s):  
Ranil Kavindra Asela Kularatne ◽  
Jalaldeen Mohamed Harris ◽  
Periyathamby Vinobaba ◽  
Champika Ellawala Kankanamge
Keyword(s):  
Heavy Metals ◽  
Temporal Variation ◽  
Brackish Water ◽  
Transfer Factors ◽  
Water Fish ◽  
Brackish Water Fish

Prospects for the Development of Brackish-Water Fish and Shrimp Culture in India

1973 ◽  
Vol 30 (12) ◽  
pp. 2341-2343 ◽  
Author(s):  
V. G. Jhingran ◽  
V. Gopalakrishnan
Keyword(s):  
Experimental Work ◽  
Brackish Water ◽  
High Tide ◽  
Test Methods ◽  
Capital Requirements ◽  
Pilot Projects ◽  
Shrimp Culture ◽  
Water Culture ◽  
Water Fish ◽  
Brackish Water Fish

Brackish-water fish and shrimp culture exists in several localities in India, but the total area used was only 10,000 ha in 1968 and might reach 15,200 ha by 1973. Some of this is in paddy fields used alternately for crops.Natural sources of seed (fish fry and shrimp larvae) are used exclusively. Usually these simply enter the ponds from the estuary during high tide periods. Production averages about 200 kg/ha per year.The potential for increasing brackish-water culture is great. Capital requirements are not excessive, and a return of 15% per annum is suggested under average conditions. Development can be encouraged by surveys of suitable areas, by experimental work on capturing and transporting seed, by artificial spawning for the production of fry of the most desirable species, and by pilot projects to test methods of supplementary feeding and other practices.

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