scholarly journals PRELIMINARY STUDY ON AQUACULLURE OF CTENOPHARYNGODON IDELLA VAL.

2021 ◽  
Vol 26 (1) ◽  
pp. 143-148
Author(s):  
J. M. Al-Jawda ◽  
A. N. Balasem ◽  
K. R. Asmar ◽  
A - S. K. Ali
Keyword(s):  
Low Temperature ◽  
Cyprinus Carpio ◽  
Grass Carp ◽  
Classical Method ◽  
Silver Carp ◽  
Ctenopharyngodon Idella ◽  
Ceratophyllum Demersum ◽  
Average Weight ◽  
Additional Food ◽  
Preliminary Study

The classical method of aquaculture in Iraq employed Cyprinus carpio L. (Common carp) as monoculture or as predominat species togather with grass carp and silver carp. In the present study monoculture of grass carp was performed. Three - hundreds fingerlings of grass carp of 1.5 g weight were cultured in about 600 m2 eartheen pond from 20th of June till 9th of November, 1997. For the first two months of the experiment, no additional feed was added to what had been available in the pond. For the rest of the culture period, 1773 kg of five species of plants were utilized. They were included 91 kg of Phargmites australis, 972 kg of Paspalim sp., 423 kg of Medicago sativa, 171 kg of Ceratophyllum demersum and 116 kg of Paspalum Paspaloides. In addition to that a total of 150 kg of manure was used as a fertilizer in three occasions. At the end of the experiment the average weight of the fishes was 498 gm ranged from 370 gm to 980 gm. Further study was commence where 300 fingerlings of grass carp weighting 34 gm as an average were cultured together with 50 fingerlings of silver carp (average weight 92 gm). The experiment January 1998. For the first two months of experiment the fishes didn't consume began in additional food probably due to the low temperature of water during this period.

scholarly journals Use of grass carp (Ctenopharyngodon idella) as a biological control agent for submerged aquatic macrophytes

2014 ◽  
Vol 32 (4) ◽  
pp. 765-773
Author(s):  
A.F. Silva ◽  
C. Cruz ◽  
R.L.C.M. Pitelli ◽  
R.A. Pitelli
Keyword(s):  
Grass Carp ◽  
Aquatic Macrophytes ◽  
Biological Control Agent ◽  
Body Weight Gain ◽  
Predation Rate ◽  
Control Agent ◽  
Ctenopharyngodon Idella ◽  
Ceratophyllum Demersum ◽  
Grass Carp Ctenopharyngodon Idella ◽  
Submerged Aquatic Macrophytes

This study aimed to evaluate feed preference and control efficacy of grass carp (Ctenopharyngodon idella) on the aquatic macrophytes Ceratophyllum demersum, Egeria densa and Egeria najas. An experiment was carried out at mesocosms conditions with 2,000 liters capacity and water residence time of 2.8 days. C. demersum, E. densa e E. najas biomasses were offered individually with sixty g and coupled in similar quantities of 30 g of each species, evaluated during 81 days, envolving 6 treatments. (1 - C. demersum, 2 - E. najas, 3 -E. densa, 4 - C. demersum + E. najas, 5 - C. demersum + E. densa and 6 - E. najas + E. densa). When offered individually, E. najas and C. demersum presented the same predation rate by grass carp, which was higher than E. densa predation rate. When plants were tested in pairs, the order of feed preference was C. demersum > E. najas > E. densa. E. najas and C. demersum percentage control ranged from 73 to 83%. No relation between biomass consumption and grass carp body weight gain was observed, probably due to differences in nutritional quality among macrophyte species according to fish necessities. Therefore, it is concluded that the use of grass carp is one excellent technique to control submersed macrophytes in Brazil.

scholarly journals Acetylcholinesterase enzyme activity in carp brain and muscle after acute exposure to diafuran

2008 ◽  
Vol 65 (4) ◽  
pp. 340-345 ◽  
Author(s):  
Jaqueline Ineu Golombieski ◽  
Enio Marchesan ◽  
Edinalvo Rabaioli Camargo ◽  
Joseânia Salbego ◽  
Joele Schmitt Baumart ◽  
...  
Keyword(s):  
Common Carp ◽  
Cyprinus Carpio ◽  
Grass Carp ◽  
Ache Activity ◽  
Bighead Carp ◽  
Ctenopharyngodon Idella ◽  
Control Treatment ◽  
Aristichthys Nobilis ◽  
Early Biomarker ◽  
The Common

Sublethal adverse effects may result from exposure of aquatic organisms to insecticides at environmentally relevant concentrations. Fingerlings of the common carp (Cyprinus carpio, Linnaeus, 1758), grass carp (Ctenopharyngodon idella, Valenciennes, 1844), and bighead carp (Aristichthys nobilis, Richardson, 1845) were exposed to diafuran, an insecticide widely used during rice cultivation in Southern Brazil. The aim of this study was to verify the relationship between the lethal concentration (LC50) of diafuran and the acetylcholinesterase (AChE) activity in brain and muscle tissues of these species as a possible early biomarker of exposure to this insecticide. LC50 was determined for fish exposed to diafuran concentrations during 96 h (short term): common carp: control, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 mg L-1; grass carp: control, 1.0, 2.0, 3.0 and 3.5 mg L-1 and, bighead carp: control, 0.5, 1.0, 1.5, 2.0, 3.0 and 4.0 mg L-1, as well as the determination of AChE at concentrations near LC50 for these species. LC50 values (nominal concentrations) were 1.81 mg L-1 for the common carp, 2.71 mg L-1 for the grass carp and, 2.37 mg L-1 for the bighead carp. All carps exposed to diafuran were lethargic (lower concentrations) or immobile. Diafuran inhibited the acetylcholinesterase activity in brain (~38%) and muscle (~50%) of all species. Muscle of bighead carp under control treatment showed higher specific AChE activity than brain (14.44 against 5.94 µmol min-1 g protein-1, respectively). Concentrations of diafuran used for rice cropping may affect Cyprinus carpio, Ctenopharyngodon idella and Aristichthys nobilis behaviors and the AChE activities in brain and muscle of these species may be an early biomarker of toxicity of this insecticide.

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