scholarly journals Influence of zeolites on lead and cadmium content in separate links of trophic chain in hydroecosystems

2016 ◽  
Vol 18 (2) ◽  
Author(s):  
N. I. Hradovych ◽  
R. P. Paranyak ◽  
Yu. M. Zabytivskyi
Keyword(s):  
Silver Carp ◽  
Research Station ◽  
Water Medium ◽  
Muscular Tissue ◽  
Trophic Chain ◽  
Cadmium Content ◽  
Hypophthalmichthys Molitrix ◽  
Cadmium Ions ◽  
Lead And Cadmium ◽  
Water Ecosystems

Information about the influence of zeolite used as adsorbent to reduce the concentration of Lead and Cadmium in separate links of trophic chain of hydroecosystem namelyn in water, phytoplankton and muscular tissue of Silver carp is given in the article. As a sorbent we used zeolite of Sokirnitsa deposit (village Sokirnitsa, Khust district Transcarpathian region) of fraction 1.0 – 4.0 mm. Investigations were made at the Lviv research station of Institute of fisheries NAAS (Lviv oblast, Horodok region, Velykyi Lyubin). The sorption properties of natural Transcarpathian clinoptilolite towards Lead and Cadmium at dynamic conditions have been studied. The paper represents research results aimed at estimating effectiveness of removing of Lead and Cadmium ions from hydroecosystems using natural mineral–zeolite. The dynamics of heavy metals content at phytoplankton and muscular tissue of silver carp (Hypophthalmichthys molitrix Valenciennes, 1844) was studied. Measurements were perfomed in pond № 24 (12) area 0.14 hectares which is fed by waters of the river Vereshchytsia. The pond depth is 1 – 1.5 meters.  Results of investigations worked out statistically combining the groups. Considerable lowering of ions content of both metals in water was determined. The lowering of cadmium content in muscular tissue of Silver carp was much noticeable than the content of Lead. Results of such investigations are rather actual and perspective and will help to reduce the content of some toxicants in water medium. Improvement of water ecosystems after use of natural sorbents will guarantee ecologically safe products of fish culture and will increase the efficiency of the branch.

Lead and cadmium content in the meat tissues of fish from water ecosystems in the vicinity of a pesticide tomb

2008 ◽  
Vol 37 (3) ◽  
Author(s):  
Krystyna Skibniewska ◽  
Janusz Guziur ◽  
Zbigniew Marzec ◽  
Stanisław Zaręba ◽  
Mirosław Grzybowski ◽  
...  
Keyword(s):  
Cadmium Content ◽  
Fish Ponds ◽  
Lead And Cadmium ◽  
Northeastern Poland ◽  
Water Ecosystems

Lead and cadmium content in the meat tissues of fish from water ecosystems in the vicinity of a pesticide tombLead and cadmium levels were determined in the meat tissues of roach, bream, and carp netted in a lake and in fish ponds threatened by a pesticide tomb and in control basins in northeastern Poland. Concentrations in roach ranged from 20 to 124 μg kg

scholarly journals ECOLOGICAL RISK ASSESSMENT OF LEAD AND CADMIUM CONTENT IN EGGS FOUND IN ECOTECHNOLOGICAL SYSTEMS

2019 ◽  
Vol 32 (3) ◽  
pp. 337-343
Author(s):  
Veselin Kirov ◽  
Alexander Tchoukanov
Keyword(s):  
Ecological Risk ◽  
Environmental Risk ◽  
Chemical Heterogeneity ◽  
Trophic Chain ◽  
Cadmium Content ◽  
Pathogenic Microorganisms ◽  
Organic Substances ◽  
Lead And Cadmium ◽  
Ecosystem Level ◽  
Technical Systems

Lead and cadmium studies have been conducted in the egg eco-system trophic chain, which is a continuation study on the chemical heterogeneity of the biosphere, assessed at the ecosystem level. For the realization of the ecologilization, a two-module model of an eco-technical system for production of eggs with models of the two main types of trophic chains is proposed: pasture and detritus type.The main product of the linearity of the technological processes in livestock breeding is fertilizer. From the point of view of efficient management of eco-technical systems to minimize environmental risk, the ecological assessment of the fertilizer for the purpose of its utilization is appropriate. It belongs to the Odum Classification Conglomerates I (1975), which includes organic substances that are potentials of nutrients and energy, and should be utilized as resources for recipients in agro-ecological or aquatic ecosystems. The fertilizer is materially different from other products under this group due to the large number of pathogenic microorganisms. Organic substances in the fertilizer are a risk factor due to the emission of greenhouse gases and toxic substances to the atmosphere and pathogenic microorganisms are biological pollutants with high risk potential due to the risk of it causing human and animal diseases.Our research has focused on the quality of products used for human food and the particularities of the movement of matter in eco-technical systems (Baykov, 1994, Baykov & Tyrawska, 1991, Baykov et al., 1996, Baykov et al. 2003). The experiments were carried out in models of eco-technical systems for eggs on the scale of "mesocosmos" via classification of Odum (1986) by analyzing the physicochemical indicators of the two elements of the incoming stream: feedstock and drinking water and an assessment of the chemical heterogeneity at the ecosystem level was performed by analyzing and hygienically assessing the physical characteristics of products used for human food.Proposed, are criteria for assessing the ecological risk of chemical heterogeneity at ecosystem level: eco-technical Clark (Ec), Clark of safety (Cs), Clark of concentrating (Cc) and Clark of technology (Ct). The results show the possibility of assessing environmental risk through the Cs criterion applied to mass of the egg/ feedstock /and for the processed manure. The ecological risk is managed through the Cs and Ct criteria by regulating the amount of toxic factors in the input stream to guarantee safe for human health secondary biological production.

Impact of Feeding Activity of Silver Carp on Plankton Removal from a High-Rate Pond Effluent

2005 ◽  
Vol 40 (2) ◽  
pp. 191-201 ◽  
Author(s):  
Nadia Berday ◽  
Driss Zaoui ◽  
Abdeljaouad Lamrini ◽  
Mustapha Abi
Keyword(s):  
Feeding Activity ◽  
Silver Carp ◽  
Treatment Plant ◽  
High Rate ◽  
Fish Pond ◽  
Gut Contents ◽  
Hypophthalmichthys Molitrix ◽  
Technology System ◽  
Solids Concentration ◽  
Plankton Communities

Abstract The effect of silver carp (Hypophthalmichthys molitrix Val.) feeding activity on the plankton communities in a high-rate pond technology system (HRPTS) effluent was investigated over a period of 100 days. The experiment was conducted at the experimental wastewater treatment plant of the Agronomic and Veterinary Medicine Institute (AVI) of Rabat, Morocco, using a HRPTS in a fish pond receiving the plant effluent. The effluent was highly dominated by phytoplankton (99.95%). Silver carp could survive and grow in the fish pond. Production was 37 kg with a very low mortality rate (12%). The high specific intestine weight (7%) and intake rates of biomass and phytoplankton by silver carp (616 g kg-1 of fish day-1 and 1.6 x 1011 cell kg-1 of fish day-1, respectively) demonstrated the importance of the feeding activity of the fish. Zooplankton intake rates were lower (2 x 107 bodies kg-1 of fish day-1). The high intestine index (3 to 4.3 for fish sizes of 14 to 22 cm) and the dominance of phytoplankton in the gut contents (99.95%) confirmed an omnivorous/ phytoplanctivorous diet. Silver carp were efficient in removing plankton from the HRPTS effluent. The net removal yields of biomass were 285 g m-3 day-1 and 322 g kg-1 of fish day-1, 7 x 1010 algal cells kg-1 of fish day-1 and 8.7 x 107 zooplankton bodies kg-1 of fish day-1, with net removal rates of 47, 64 and 62%, respectively. The total suspended solids concentration decreased from 211 in the inflow to 112 mg L-1 in the fish pond.

The effects of water hardness on the hatching and viability of silver carp (Hypophthalmichthys molitrix) eggs

Aquaculture ◽  
1987 ◽  
Vol 64 (2) ◽  
pp. 111-118 ◽  
Author(s):  
Angelito C. Gonzal ◽  
Emiliano V. Aralar ◽  
Josefina Ma.F. Pavico
Keyword(s):  
Silver Carp ◽  
Water Hardness ◽  
Hypophthalmichthys Molitrix

scholarly journals Genetic relationships among founders of a silver carp (Hypophthalmichthys molitrix) genetic improvement program in Bangladesh

Aquaculture ◽  
2021 ◽  
pp. 736715
Author(s):  
Matthew G. Hamilton ◽  
Wagdy Mekkawy ◽  
Benoy K. Barman ◽  
Md. Badrul Alam ◽  
Manjurul Karim ◽  
...  
Keyword(s):  
Genetic Improvement ◽  
Genetic Relationships ◽  
Silver Carp ◽  
Hypophthalmichthys Molitrix ◽  
Improvement Program
Sign in / Sign up

Export Citation Format

Share Document