Using the common carp Cyprinus carpio L. in polyculture ponds to increase both phytoand zooplankton availability has become a popular practice for the cultivation of plankti vorous fish, such as rohu Labeo rohita Hamilton. However, the dynamics of how common carp influences the environment and ecology in polyculture ponds are unclear. In the present study, the effects of various stocking densit...

Worldwide koi herpesvirus (KHV) causes high mortalities in Cyprinus carpio L. aquaculture. So far, it is unknown how the different variants of KHV have developed and how they spread in the fish, but also in the environmental water bodies. Therefore, a phylogenetic method based on variable number of tandem repeats (VNTR) was improved to gain deeper insights into the phylogeny of KHV and its poss...

This study details the nutritional and digestive properties of protein isolates that are extracted from carp (Cyprinus Carpio L.) muscle using pH shifting methods. Alkaline (ALPI) and acid (ACPI) protein isolates exhibit higher protein yields (87.6%, 76.3%, respectively). In addition to the high recovery of myofibrillar protein, a portion of the water-soluble proteins is also recovered. The moi...

Anesthetics are often used to immobilise fishes in research. Many chemicals have been tested in anesthetisation of fishes and each chemical has its own merits and demerits. In the present study, four anesthetics namely, 2-phenoxyethanol, quinaldine, MS-222, and benzocaine were selected to test the efficiency in anesthetisation of common carp Cyprinus carpia. Results indicated that the induction...

A 12 day growth trial was conducted to compare the effect of the variation in microcystins (MC) composition of two bloom samples of Microcystis aeruginosa on the growth performance and microcystin accumulation in common carp Cyprinus carpio larvae. Two M. aeruginosa natural bloom samples with different MC profiles were collected and larvae were exposed to cyanobacterial cells through their diet...

Five highly variable microsatellite loci were used to investigate genetic variations and population structure of common carp of Caspian Sea. A total of 54 fish were genotyped giving 35 alleles over all loci. The mean number of alleles, per locus in population ranges from 5.5 to 13.0 and the mean observed heterozygosity at the five loci was 0.84. An analysis of genetic variations indicated the H...

The study was designed to isolate and characterize the collagen from skin, scales and fins of Cyprinus carpio and Hypophthalmichthys molitrix. For this purpose nine fishes of each species of three weight groups were collected and categorized as W1 (250-500 g), W2 (501-750 g) and W3 (7511000 g). The maximum skin protein content was recorded as 28.13% and 29.13% in C. carpio and H. molitrix, resp...

Retinol-binding proteins (RBP) are a family of proteins with diverse functions. They are carrier proteins that bind retinol. An in silico study has been performed for 3D structure prediction and molecular phylogenetic analysis of RBP from two freshwater fishes, Danio rerio and Cyprinus carpio. The analyses were performed using sequence data of rbp gene and retinol binding protein, extracted fro...

The larval development of the nematode Contracaecum rudolphii (Rudolphi, 1819), a common parasite of the proventriculus of cormorants, was experimentally studied. Within the eggs cultivated in freshwater under laboratory temperatures of 20-22 degrees C, the developing larva undergoes two moults on days 4-5, attaining the third larval stage. Most of the ensheathed third-stage larvae, 291-457 mic...

The aim of the present investigation was to determine the effect of heavy metal pollutants such as cadmium, chromium, nickel and lead in aquatic system on common carp (Cyprinus carpio L.) by using a set of biochemical parameters. The experimental group of fish was exposed to a sublethal concentration of 5 mg/L of combined (Cd+Pb+Cr+Ni) metal solution containing 1.25 mg/L of each metal ion (1/10...