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Search Results: 1 - 10 of 398 matches for " Carp "
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Risk Analysis on Spring Viraemia of Carp from Imported Cyprinidae  [PDF]
Bin Wu, Lin Zhang, Yuting Zang, Hongxu Jiang
Advances in Microbiology (AiM) , 2018, DOI: 10.4236/aim.2018.87033
Abstract: Spring Viraemia of Carp (SVC), also known as catfish infectious ascites, is an acute, hemorrhagic infectious septicaemia. The disease can harm salmon, catfish, Carassius auratus, Hypophthalmichthys molitrix, Aristichthys nobilis, etc., and is popular in both Europe and Asia. SVC is the first type of quarantine target for fish port quarantine. The World Organization for Animal Health (OIE) lists SVC as a disease that needs to be declared, and China’s Ministry of Agriculture defines it as a class of animal disease. In order to avoid the risk of introduction of IHN due to the introduction of fingerlings, and provide decision-making departments with scientific decision-making data, this paper conducts a systematic risk analysis of SVC from risk assessment, risk management, and risk communication.
Silver Carp (Hypophthalmichthys molitrix, Val. 1844) Stocking in Lake Kinneret (Israel)  [PDF]
Moshe Gophen, Gregory Snovsky
Open Journal of Ecology (OJE) , 2015, DOI: 10.4236/oje.2015.58028
Abstract: Silver Carp (SC) (Hypophthalmichthys molitrix, Valenciennes, 1844) is a worldwide common fish for aquaculture and stocking in lakes and reservoirs. The fish is distributed through rivers, aquaculture and stocking in about 90 countries around the world. SC was first introduced into Lake Kinneret in 1969 and continues onwards. Total number of stocked fingerlings (1969-2013) was 18.5 × 106 (average: 441 × 103 per year). The total catch (tons) of SC in Lake Kinneret was 3218 tons, average: 75 t/year. Studies on SC in East Lake, China, revealed that the fish was a phytoplanktivorous and percentage of consumed phytoplankton varied between 83% - 91% where Microcystis was the major item. In Lake Kinneret, the effects of SC and the Cichlid, Galilee St. Peters Fish (S. galilaeus) on Plankton resources are not independent and potentially competitors. SC is also known as efficient consumer of Microcystis. It was found that environmental conditions in Lake Kinneret were optimal for reasonable growth and recruitment of this fish to commercial fishery. The SC did not reproduce in Lake Kinneret and we recommended introducing annually 600 - 1000 × 103 fingerlings for the benefit of water quality protection and fishermen income.
Koi herpesvirus disease in carp
Jeremi? Svetlana,Radosavljevi? Vladimir
Veterinarski Glasnik , 2007, DOI: 10.2298/vetgl0702053j
Abstract: A disease in the koi carp (Cyprinus carpio koi) and the common carp (Cyprinus carpio carpio), caused by the herpesvirus and accompanied by a high mortality rate, has spread across numerous fish ponds all over the world since 1998, resulting in massive mortality and significant financial losses. The herpesvirus-like virus, called the koi herpesvirus (KHV) has been isolated and identified from the koi and the common carp in the course of the incidences of massive mortalities. The first appearance of a disease with a high mortality in the common and the koi carp caused by the koi herpesvirus (KHV) was described in 1998 in Israel and the United States of America (USA). Since that time, a large number of cases of outbreaks of this disease have been confirmed throughout the world, including the USA, Israel, and a large number of European countries. The deaths occurred seasonally, in late spring or early autumn, when the water temperature was from 18-28oC. The most important factor of the environment that affects the occurrence and gravity of this disease is the water temperature. This disease is currently considered one of the factors that present the biggest threat to populations of the common and the koi carp. Diseased fish are disoriented, their movements uncoordinated, their breathing rapid, gills swollen, and they have local skin lesions. The virus was isolated from tissue of diseased fish and cultivated on a KF-1 (koi fin cells) cell line. Electronic microscopy examinations revealed virus identical viral particles of the Herpesviridae family. Analyses of the virion polypeptide and DNA established differences between the KHV and the previously known herpesvirus of the Cyprinida family, Herpesvirus cyprini (CHV), and the virus of the channel catfish (Channel catfish virus - CCV). In the years 2004 and 2005, high mortality was established among one-year and two-year carp fry on three fish ponds. At two ponds, the deaths occurred among one year and two-year carp fry during the spring period, when the water temperature was over 18oC. During the autumn period, mortality was recorded among one-year carp fry at water temperatures above 23oC. On the grounds of the determined pathomorphological changes and the high mortality during the period of the year when the temperature was above 18oC, we suspect that KHV is also present in fish ponds in Serbia, even though the virus itself has not been isolated. The objective of this work is briefly to present the relevant data on this disease which is inflicting significant losses to carp production, to show the current di
Influence of abiotic and biotic environmental factors on weight gain of cultured carp on a carp farm
Markovi? Z.,Duli? Zorka,?ivi? Ivana,Mitrovi?-Tutund?i? Vera
Archives of Biological Sciences , 2009, DOI: 10.2298/abs0901113m
Abstract: During the period from April to October in the production season of the year 2000, seven chemical parameters of the aquatic environment were analyzed twice a month for the amount of natural food (zooplankton and bottom fauna) on pond No. 4 at the Dubica Carp Farm in Banatska Dubica (Vojvodina, Serbia). Correlation between natural food and carp growth was analyzed as well. The investigations revealed negative correlation between the amount of natural food per kilogram of ichthyomass and pH (p < 0.001, r = -0.875), electroconductivity (p = 0.0294, r = -0.673), COD (p = 0.0052, r = -0.782), total water hardness (p = 0.0186, r = -0.709), and carbonate water hardness (p = 0.0087, r = -0.758). However, statistically significant positive correlation was found between the biomass of natural food (g/kg of ichthyomass) and concentration of nitrates (p < 0.01, r = 0.841) and phosphates (p = 0.0427, r = 0.640). Concerning com-ponents of natural food (zooplankton and bottom fauna), bottom fauna biomass had a very low production and showed no statistically significant correlation (p = 0.137, r = 0.491) with total natural food biomass whereas zooplankton biomass was very significantly correlated (p<0.001, r = 0.830) with the total amount of natural food, indicating that zooplankton was the dominant component of natural food at the investigated fish pond. The daily weight gain (%) of cultured fish was greatest at the beginning of the carp farming season, i.e., in April, when it comprised a value of 2.3%. After negative growth at the end of May (-0.2%), a gradual increase of weight gain was recorded until the beginning of September. By comparing the biomass of natural food with the daily weight gain (%) of carp, it was observed that the weight gain had a trend similar to biomass of natural food with a 15 day interval. This relationship was justified by positive statistical correlation (p = 0.006, R = 0.960). As zooplankton was the major component of natural food, fish relayed on it as the main protein source showed by a significant positive correlation (p = 0.034, r = 0.907).
Ljubica Debeljak
Ribarstvo : Croatian Journal of Fisheries , 1997,
Abstract: Researches on qualitative composition of phytoplanktons in differently manured fish-ponds "Jelas" were carried out in 1996. The carp fingerling from larve to its second month was nurtured in three fish-ponds (A,B,C) with the plantation of larves of 1,000,000 ind.ha-1. Larves and carp fry were nurtured by trouvit and wheat flour. The fish-pond A was controlled but not manured; the fish-pond B was fertilized by the total of 200 kg.ha-1 NPK (15:15:15) and the fish-pond C was fertilized by the total of 75 l.ha-1 of UAN and 75 kg.l-1 of NP (12:52). All fish-ponds had similar water chemism. In the qualitative composition of phytoplanktons there were stated 93 kinds, members of systematic groups Cyanophyta (10%), Euglenophyta (16.2%), Pyrrophyta (2%), Chrysophyta (39.4%) and Chlorophyta (32%). All fish-ponds had similar qualitative composition of phytoplanktons with the flora similarity quotient from 65.5% to 72%.
Survey of Saprolegnia sp. in cage cultured carp in Tikves Lake in 2005 and 2006
Aleksandar Cvetkovic,Miso Hristovski,Slavco Mrenoski,Iskra Cvetkovic
Macedonian Veterinary Review , 2007,
Abstract: Fish cage culture is one of the most intensive and productive aquaculture methods. Besides all production advantages, this system is facing with health problems in cultured fish due to lack of prophylactic measures and increased disease susceptibility as a result of the culture technology. In order to determine the presence of the Saprolegniosis in the warm water cage culture systems, a two year monitoring was conducted. The survey included investigation in 12 carp (Cyprinus carpio) cage culture systems in Tikves Lake in the period 2005 and 2006. The objects of examination were only the growing categories of carp (yearlings). From each farm 30 specimens were examined. The survey included clinical and pathological examination as well as routine laboratory diagnostics – microscopic examination and isolation of the agent on fungal specific nutrient agar. The conducted research, demonstrated 91,66% prevalence of the causitive agent in the investigated farms in 2005 and the prevalence of 33,33% in 2006. Although the disease was present in 2005 and 2006, obtained results demonstrated deviation in the appearance and presence of Saprolegnia sp. in the investigated period. The determined difference was a consequence of the applied ichtyotechnical and ichtyosanitary prophylactic measures, resulting with significantly lower prevalence in 2006.
The influence of stocking density on the growth of common carp, Cyprinus carpio, in a recirculating aquaculture system
Ionica Enache,Victor Cristea,Tudor Ionescu,S?ndita Ion
Aquaculture, Aquarium, Conservation & Legislation , 2011,
Abstract: The paper presents some aspects regarding the influence of stocking density on the breeding of the common carp in a recirculating aquaculture system (RAS). The experiment covered a 30 dayperiod. It was conducted in four aquaculture tanks, 500 L/tank, in the recirculating aquaculture pilot system of “Dunarea de Jos” University of Gala i. Two kind of stocking density variants were compared: 64 kg/m3 in V1 (B1, B3) and 32 kg/m3 in V2 (B2, B4). The stocking density was: 491 fish in B1, average weight - 65 g/ fish; 245 fish in B2, average weight - 66 g/ fish; 211 fish in B3, average weight - 152 g/fish; 107 fish in B4, average weight - 150 g/fish. The technological indicators obtained revealed the following: the specific growth rate (SGR), calculated as a mean value on the two repetitions, was 1.28%/day in V1 and 1.49 %/day in V2, indicating better growth in V2; the food conversion ratio (FCR), calculated as the mean value of the two repetitions, was 1.28 in V1 and 1.06 in V2, expressing a higher efficiency in capitalization of food in V2. The mean biomass gain in V1 was 30.46 kg/m3 as compared to 18.55 kg/m3 in V2, almost perfectly correlated with the stocking density. The daily growth rate (DGR) varied in a similar way, from 494.57 to 520.90 g/day in V1 and 302.4 to 315.9 g/day in V2. The experiment demonstrated a remarkable technological plasticity in both experimental variants, whereas, in terms of technological performance indicators, it was found that the application of lower stocking densities lead to higher crop biomass. The high stocking density means, therefore, large amounts of metabolic waste, removed from the breeding units through their effluent, the recirculating flow of which is 4m3/h, enough to ensure the whole volume of water in a growth tank to be changed every half hour.
Mirko Turk,Ljubica Debeljak
Ribarstvo : Croatian Journal of Fisheries , 1995,
Abstract: In experimental ponds of individual sizes 0.1 ha-1 the fish farm Dragani i, the economic feasibility of the culture of consumption carp fish in poli culture with herbivorous fish was investigated (Hypophthalmichthys, molitrix, Val. Aristichthys nobilis Rich. Ctenopharyngodon idella Val.). The stock density was 3250 ind.ha-1of total one year old fish: carp 77%, herbivorous 23%. Investiga- tions were investigations were carried out during the culturing season, from 25 April to 4 October 1990. Thre treatments were investigated: I - feeding the carp with grains, without fertilizig the pond, II - feeding the fish with grains and fertilizing the pond with mineral fertilizer NPK of the formula 17:8:9 with the total quantity of 400 kg.ha-1, and III - feeding the carp with industrial brickets with 20% animal protein. The results show that treatments II and III had appositive affect on the growth and amount of all species of fish in poli culture. The most favorable economic result was reached with treatment II where the carp were fed with grains. The fish treated in this variation reached the highest economic production, accumulation and gain. The highest total gain was reached in the III variation along with supplement protein feeding. The result of investigations showed a satisfactory application of animal proteins in food of consumption carp, along with the proper choice of polyculture and stock density.
Kre?imir Fa?ai?,Ljubica Debeljak,Radovan Erben,Mirko Turk
Ribarstvo : Croatian Journal of Fisheries , 1996,
Abstract: The researches has been conducted in the test ponds of fishfarming Dragani i“ each of them O.25 ackres great and 1 meter deep. During the breeding season of 1991, there have been examined the effect of mineral fertilizers NPK (12: 12: 12) and the reinforced nutrition of the fish with the protein briquettes ( Gloria ) on the chemism in the test ponds. During the breeding season, there have been stated certain differences in the quantity of the 02, NH4+, NO-, P043- and the outgoings of KMn04 among the separate variants of the treated ponds and the inflow water of the brook Stojnica (Tables 1, 2-6) and also the significant oscillations of all chemical indicators. The average quantity of 02 in the separate pond variants has reduced between 5% and 13% in relation to inflow water and the quantity of N03- between 24% and 43%. The outgoings of KMn04 has increased between 6% and 22% as compared with the inflow water. The reduction of 02 and N03- and the incensement of outgoings of KMn04 in the test ponds has not been significant (P 05). The quantity of NH4+ and P043- has increased between 36% and 82% and between 49% and 113% in all variants of test ponds respectively as compared with the inflow water. The differences are significant (PO. 05). The asserted differences about the quality of separate chemical parameters in the variants II. and III. as compared with the control variant I. has been significant (PO. 05) only for the quantity of NH4+ and P043-.
Isolation and Characterization of Pepsin-Solubilized Collagen from the Skin of Black Carp (Mylopharyngdon piceus)  [PDF]
Guo Ping Wu, Xiao Ming Wang, Li Ping Lin, Su Hua Chen, Qing Qing Wu
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.57076

To make more effective use of underutilized resources, pepsin-solubilized collagen (PSC) was successfully extracted from the skin of black carp (Mylopharyngdon piceus) with a yield of 45.7% based on dry weight. The PSC comprising two identical α1-chains and one α2-chain with no disulfide bond was characterized as type I, and it contained 195 imino acid residues vs. 1000 amino acid residues. The collagen showed an absorption edge around 218 nm, which was lower than the maximum absorption wavelength of other PSC. The denaturation temperature of PSC was 25.6°C, which was lower than that of porcine collagen by approximately 11°C. The isoelectric point (pI) was estimated to be 8.23, and the collagen was soluble at an acidic pH as well as below 40 g/L NaCl. It is thought that the high yield and stability of PSC from the skin of black carp warrant its application as a new source of collagen for industrial purposes.

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