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How Big Do Goldfish Get Before Spawning, How Many Eggs They Lay at a Time, and a Detailed Guide to Raising Them
Goldfish are the earliest breed in the history of ornamental fish in the world. They are easy to keep, have unusual shapes and brilliant colors, and are generally golden yellow. So do you know how big goldfish get before spawning? How many eggs can they lay at a time? How do you raise them? According to available information, goldfish usually mature and spawn at 1 year of age, meaning they can reproduce 1 generation per year. If the temperature is raised in winter and feeding management is strengthened, goldfish at 7-8 months of age can also spawn early in the severe cold of winter; they do not necessarily have to reach 1 year (12 months) of age before they can spawn and reproduce. Goldfish can spawn multiple times during the breeding season. In the places reached by the light, small fish will hatch in about a week.
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What Season Do Crayfish Spawn? A Detailed Explanation of Annual Spawning Frequency and Egg Output
Crayfish are freshwater economic shrimp species, widely welcomed by people for their delicious meat. In summer, they are an indispensable delicacy at late-night food stalls. So do you know what season crayfish spawn? How many times can they spawn in a year? How large is the egg output? According to crayfish farmer Grandpa Li,
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At what size do loaches start spawning, and how many eggs do they lay at one time?
The loach is called the "ginseng of the water" and has high farming value. Natural breeding means imitating natural environmental conditions under artificial control so that loaches spawn and hatch on their own. So at what size can loaches spawn? How many eggs can they lay at one time? Next, let us learn about it together.
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To protect mackerel spawning, Taiwan, China announces a 20-day fishing ban during peak season for the first time
To protect mother mackerel during spawning, Taiwan, China announces for the first time a 20-day fishing ban during the peak mackerel spawning period
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Detailed Explanation of Basic Knowledge on Loach Induced Spawning Techniques
Basic Knowledge on Loach Induced Spawning
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Key Points and Detailed Operation Methods of Loach Induced Spawning Technology
Induced Spawning Technology for Loach
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Detailed Explanation of Artificial Breeding and Induced Spawning Techniques for Rice Field Eels
Artificial Breeding and Induced Spawning Techniques for Rice Field Eels
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When do Chinese giant salamanders spawn? A detailed explanation of the spawning season timing
When is the spawning season of the Chinese giant salamander?
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How to ensure success in the three key areas when inducing spawning in broodstock in summer?
From the Start of Summer to Grain Full is the best period for inducing spawning in broodstock. At this time the water temperature is suitable, the spawning rate and hatching rate of broodstock are high, and the survival rate of fry after being stocked in ponds is also high. If this favorable opportunity is seized and strict control is exercised over the three key areas - broodstock selection, drug use, and spawning induction management - spawning induction can be successful. Selecting good mature broodstock Whether the broodstock used for spawning induction are mature determines the quality of the spawning induction results. When selecting broodstock, maturity is generally judged by external characteristics. Mature female broodstock have a distended, rounded, soft and elastic abdomen; in grass carp and silver carp, the ribs can be felt when touched with a finger, and the genital pore protrudes and is slightly red. Immature female broodstock have a relatively rounded front abdomen but a thinner rear abdomen, are not soft enough and lack elasticity, and the genital pore does not protrude or protrudes only slightly and shows no red color. Overmature female broodstock show an excessively distended abdomen that has elasticity but no resilience, like an inflated appearance, and the genital pore protrudes and is congested and purplish red. Therefore, when selecting broodstock, maturity cannot be determined by abdominal size alone.
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Detailed Explanation of Broodstock Induced Spawning Techniques in Turbot Aquaculture
Turbot is found in sea areas from the Mediterranean to the coast of Norway. In Europe, turbot is a valuable cultured fish species. Over the past 10 years, turbot aquaculture has continued to develop. Turbot aquaculture production increased from 150 tonnes in 1985 to 3,700 tonnes in 1998. In the coastal waters of the Atlantic, natural reproduction of turbot occurs in summer; however, by artificially controlling the photoperiod and water temperature, or by controlling only the photoperiod, turbot may spawn year-round. Turbot spawns in batches, with as many as 10 spawning events during the reproductive period. Under captive conditions,
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