-
An Introduction to the Characteristics of Salmon and a Detailed Explanation of Breeding Techniques
Salmon, also known as sanwenyu or damaha fish, is a cold-water, highly migratory fish. Salmon has delicious meat, a very good taste, and is rich in nutrients, making it one of the healthiest fish species in the world. I. Types and Characteristics of Salmon There are more than 30 salmon species of commercial value worldwide, but currently only 6 species of salmon and 2 species of trout are the most common. Farmed varieties currently include Pacific salmon, coho salmon, Atlantic salmon, Arctic char, golden trout, triploid trout, and rainbow trout, among others. Under natural conditions, salmon like to inhabit
-
Five-pace snake breed introduction: getting to know this snake species
The five-pace snake is also known as the money white-flowered snake, the many-banded krait, the small white-flowered snake, the white-flowered snake, and the hundred-joint snake. It belongs to the family Elapidae in the phylum Vertebrata. The snake's body is slender, coiled into a round shape, with the head in the center and the tail held within the mouth, resembling the size of an ancient copper coin, hence the name "money white-flowered snake." The snake's head is slightly thicker than the body, rectangular-round, and dark brown. There is a raised vertebral ridge on the back, and the entire body is covered with transverse ring bands composed of fine dark brown and white scales. The dark brown bands are relatively wide, with 45 to 60 bands. The belly is grayish-white or yellowish-white, and the dark brown bands
-
What is osthole? Introduction to the mode of action of botanical pesticides
Osthole - Osthole is the active ingredient extracted from the dried, mature fruit of Cnidium monnieri (cnidium fruit), a plant of the Apiaceae family; the formulation is 0.4% osthole emulsifiable concentrate. It acts mainly by contact toxicity, with stomach toxicity as a secondary effect, and has good control efficacy against cabbage caterpillars on cruciferous vegetables and tea geometrid moths on tea plants. For controlling cabbage caterpillars on cruciferous vegetables, the dosage is 80-120 ml of 0.4% emulsifiable concentrate per 667 sq m; for controlling tea geometrid moths on tea plants, the dosage is 100-120 ml of 0.4% emulsifiable concentrate. Generally, per 667 sq m use
-
Introduction to the Characteristics and Farming Techniques of the Jingxi Large Hemp Duck Breed
Origin (or distribution): Jingxi, Debao, Napo and other counties in Guangxi. Main characteristics: large body size, rectangular trunk, and plumage colors divided into three types, namely the dark hemp type (horse duck), the light hemp type (phoenix duck) and the black-and-white type (crow duck). Head plumage colors are respectively dark green, finely speckled black-and-white, and bright green; shanks and webs are respectively orange-red or brown, orange-yellow, and dark brown. Birth weight is 48 grams; adult body weight is 2.7 kg for males and 2.5 kg for females. Slaughter measurements: at 90 days of age, male ducks have a semi-eviscerated rate of 84.0
-
How to prevent fetal resorption in sows? Introduction to practical methods
Embryos die early during development and are absorbed by the sow, commonly known as fetal resorption. It is one of the important causes of low farrowing rates, and this problem can be solved through the following methods. 1. Strengthen feeding management: 3 to 14 days before mating, increase protein feed and energy feed, and add minerals and vitamins at the same time, so that they enter the best mating state more quickly; for empty sows in poor body condition, the "flushing" feeding method before mating can be adopted, that is, strengthen
-
What kind of fish is the beautiful-banded loach? Introduction to its species characteristics
Common name: beautiful-banded loach. Origin and season: distributed in the Yuanjiang River system. Introduction: The head is slightly flat and depressed, with the cheek area bulging out. The lip surface is smooth or wrinkled. The tooth-like protrusion on the upper jaw is relatively weak, and the center of the lower jaw has a "V"-shaped notch, but it is sometimes not obvious. Body scales are small and fine, distributed only after the origin of the dorsal fin. The lateral line is complete. In small individuals, the head has spots only on the dorsal surface, while in larger specimens there are also spots or markings on the cheek area. A bottom-dwelling fish, inhabiting river sections with fast-flowing water and gravel substrates. The individuals are relatively large,
-
What kind of fish is the silver crucian carp? A comprehensive introduction to its breed characteristics
The silver crucian carp, also known as the Japanese crucian carp, the Osumi crucian carp, the Kawachi crucian carp, etc. Because the silver crucian carp has advantages such as a wide feeding habit, fast growth, large individual size, a high catch rate, and few diseases, it can grow, develop, mature, and spawn well in all kinds of freshwater bodies in our country, and is generally welcomed by fish farmers. It has already been promoted over large areas in many provinces and cities in our country. 1. Breed origin The silver crucian carp is native to Japan's long-standing Lake Biwa. Around 1897, a fisherman from Kawachi District, Osaka Prefecture, moved it into inland rivers and ponds for rearing. After many years of domestication and careful selection
-
What to Do About Tail Biting in Pigs? Detailed Introduction to Prevention and Control Methods
For pig herds with mild tail biting, white liquor or gasoline diluted with water can be sprayed on the herd 1-2 times, which can effectively control the problem; for bitten pigs, the wounds should be promptly cleaned with potassium permanganate solution and coated with iodine tincture to prevent wound infection; for severe bites, antibiotics can be used for treatment.
-
What kind of snake is the tiger keelback? An introduction to its physical features and habits
Tiger keelback (Rhabdophis tigrinus), with a total body length of nearly 1000 mm. The dorsal surface of the body is emerald green or grass green; on both sides of the front part of the body there are thick black and orange-red patches arranged alternately, and on both sides of the nape there is a pair of thick black "eight"-shaped markings. Distribution: widely distributed across the country; found in Tianjin, Hebei, Shanxi, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Jiangsu, Zhejiang, Anhui, Fujian, Taiwan, Jiangxi, Shandong, Henan, Hunan, Hubei, Guangxi, Sichuan, Guizhou, Yunnan, Tibet, Shaanxi, Gansu, Qinghai, Ningxia and other places
-
Detailed Introduction to Common Fish Feed Formulas
1. Carp feed formula. ① Wheat bran 43%, fishmeal 30%, soybean cake 15%, barley 10%, additives 2%. ② Soybean cake 50%, fishmeal 15%, wheat bran 15%, rice bran 15%, vitamins 1%, inorganic salts 1%, antibiotics, scraps 1%, binder 2%. 2. Grass carp feed formula. ① Rice bran 40%, wheat bran 38%, soybean cake 10%, fishmeal 10%, yeast powder 2%. ② Cornmeal 70%, fishmeal 10%, soybean cake meal 15%, wheat bran 5%. On this basis, additionally add (
条件筛选