نتایج جستجو برای: کپور دریایی cyprinus carpio
تعداد نتایج: 9292 فیلتر نتایج به سال:
The common carp (Cyprinus carpio) belongs to the family Cyprinidae. In nature, carp live in the middle or lower reaches of a river with slow currents, or in marshes. Their habitats are usually weedy areas with a muddy bottom. Carp fry feed on zooplankton such as rotifers and copepods, but as they grow up they become benthic feeders, feeding on animals and other organic material. The cyprinids h...
Distribution ! e common carp [Cyprinus carpio Linnaeus (1758)] has been one of the oldest domesticated species of fi sh for food. Culture of carp in China dates back to at least the 5th century BC, although domestication began much later. ! e European races of carp derived from wild carp of the Danube; the earliest attempts date back to the Roman Empire and spread of Christianity in Europe, fro...
Environmental DNA (eDNA) from aquatic vertebrates has recently been used to estimate the presence of a species. We hypothesized that fish release DNA into the water at a rate commensurate with their biomass. Thus, the concentration of eDNA of a target species may be used to estimate the species biomass. We developed an eDNA method to estimate the biomass of common carp (Cyprinus carpio L.) usin...
Various chemical and biological measures were determined in carp (Cyprinus carpio) sampled from seven sites along the Cuyahoga River, Ohio; from the relatively pristine headwaters to the lower portion heavily polluted from various industrial, urban and wastewater treatment plants (WWTP). Levels of nonylphenol (NP), nonylphenol ethoxylates (NPEs; NP1EO, NP2EO) and total NPEs (NP plus the NPEs) i...
An investigation on antioxidative properties of different molecular weight fractions protein hydrolysate produced from Common carp (Cyprinus carpio) head
The aim of the study was to demonstrate seasonal changes in the hydrolytic and transferase activity of neutral α-glucosidase, the level of glucose, cholesterol, triglycerides and total protein in the annual breeding cycle of the carp. The study was conducted on fish from a fish farm in Lower Silesia (Poland). Blood serum was collected from the heart in: June, September and December of two conse...
Water temperature-dependent degradation of environmental DNA and its relation to bacterial abundance
Environmental DNA (eDNA) is DNA shed by organisms into surrounding environments such as soil and water. The new methods using eDNA as a marker for species detection are being rapidly developed. Here we explore basic knowledge regarding the dependence of the eDNA degradation rate on time and water temperature, and the relationship between eDNA degradation and bacterial abundance. This subject ha...
در این پژوهش، کارایی پروبیوتیکهای پریمالاک و پروتکسین در غلظتهای مختلف (1/0، 3/0، 5/0 و 1 درصد) و یک تیمار شاهد در غذای ماهی کپور وحشی (cyprinus carpio) در میزان رشد و بقای آنها و همینطور بار باکتریهای روده آنها (بار کلی میکروبی و لاکتوباسیلوس) در 60 روز مورد بررسی قرار گرفت. میزان ضریب رشد ویژه و وزن نهایی بچه ماهیان کپور در تیمارهای آزمایش نسبت به تیمار شاهد بالاتر بود و میزان تلفات و ضریب تب...
Predator cues and diet, when studied separately, have been shown to affect body shape of organisms. Previous studies show that the morphological responses to predator absence/presence and diet may be similar, and hence could confound the interpretation of the causes of morphological differences found between groups of individuals. In this study, we simultaneously examined the effect of these tw...
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