First, the performance of difficult problems 1, slowing growth. Authentic Yellow River Clam generally weighs 250-500 grams each year, and in the second year it weighs 500-1,000 grams. In recent years, it has been found that in the first year of growth in many places, the Yellow River larvae can only grow to 100-130 grams in weight, and they can only grow to 500 grams in weight every two years. 2, precocious puberty. The normal Yellow River Clam is generally more than 2 years old to be sexually mature. The male individuals of the Yellow River Clam, which have been cultivated in many places, have already matured at the age of 1 and seriously affected the normal growth of the Yellow River Clam. 3, weakened disease resistance. The Yellow River Cockroach is famous for its strong resistance to disease, and generally does not suffer from the disease of large quantities of dead fish. In recent years, there have been repeated occurrences of morbidity, such as bleeding, in the Yellow River in many places. 4, body type, body color have a greater change. In some areas, the Yellow River eel, which has been farmed, has a large stomach and its body color has become lighter or darker. Second, the reasons for difficult to raise 1, the choice of broodstock, use inappropriate. Some fish species growth sites (households) cannot accurately distinguish the authentic Yellow River Clam and other carp due to technical reasons. They often use artificial clams and hybrids as the Yellow River Clam to breed artificially. The quality of the produced carp seedlings is seriously mixed. Degeneration; Some seed production farms (households) just choose mature fish from commercial fish to be brooded when selecting broodstock, neglecting the intrinsic quality standards such as growth rate and disease resistance of broodstock; some seed production farms (Family) Only a small number of progeny produced from the same batch of broodstock will be selected for breeding in successive years. This will result in the phenomenon of inbreeding, and at the same time it will easily lead to serious degradation of the good traits. 2. The quarantine measures are not strict and are not standardized. Some seed production sites (households) did not completely disinfect seedling pools, hatching pools, and other facilities, and could not completely kill wild fish, causing mixed varieties during artificial reproduction. Third, the method to solve the problem should be used 1. When purchasing Yellow River Clam seedlings, it must be prudent and should purchase authentic seedlings. Do not try to buy some counterfeit, degenerate, and mixed seedlings. 2. The fishery administrative authorities of various regions shall strictly implement the fishery regulations concerning the production of fish, and resolutely ban those farms (households) engaged in seed production that do not meet the production conditions. The competent technical department shall regularly inspect all aspects of production and distribution to eliminate the production and sale of inferior and inferior seedlings. 3. The unit responsible for the preservation of Yellow River alfalfa should do a good job in the purification and rejuvenation of the Yellow River alfalfa original species; adopt various effective measures to ensure that the fine characters of the Yellow River alfalfa are not degraded. 4. Each squid species breeding unit of the Yellow River should strictly control the broodstock selection, neglect the abuse of broodstock, and abide by professional ethics.
The micro circulation is one of life basic characteristics, and is that the organism unceasingly carries on the matter, the energy and information transmission with the environment. The unicellular organism directly carries on transmission through the cell membrane, the extremity animal is carries on the transmission through the organization gap in blood lymph, but because of evolving to the mammal stage (for example human being), only has the lung ,the stomach and intestines separately carry on material, the energy, the information transmission through the trachea and the esophagus with the external environment, other organized the organ`s position, the function, the metabolism already to finalize, constitutes the organization and the cell of the organ, cannot be direct with the external environment communication, only through tissue fluid, the blood, and the lymph carry on material, the energy, the information transmission.
The Nailfold Capillaroscopy Microcirculation Microscope is an advance medical photoelectric apparatus,equipped with built in special LED light source,used mainly in observation on human nail fold capillary microcirculation or term as video Nailfold capillaroscopy,Such as capillary blood flow, abnormal microcirculation of the vascular structure, cell adhesion, through its powerful 380X(or 240X)optical magnification. Undistorted, real time dynamic video streaming via Sony CCD imaging device onto the LCD monitor screen.
8 Inch Micirculation Microscope Handheld Microscope,8 Inch Micirculation Microscope,Microcirculation Detector,Nailfold Micirculation Microscope Shenzhen Guangyang Zhongkang Technology Co., Ltd , https://www.lighttherapymachine.com
Simply insert the finger to the holder below the optical lens apparatus, fine-tune to fix the focal length and uncover the desired images within seconds.Blood capilliary microcirculation microscope is a non-invasive diagnostic tools, which is gaining large credit among physicians of different specialities in for study of skin blood capilliary network.