How common eel farming technologies to distinguish male and female eel

For many farmers involved in aquaculture, how to identify the male and female of Astragalus is a problem. Now we will introduce the identification methods of male and female Astragalus one by one for your reference.
1. Appearance: The female's head is not uplifted, the back is dark brown, there is no spotted flower spot, sometimes 3 parallel brown spots can be seen, the body sides gradually become lighter from top to bottom, brown spots are fine and Evenly distributed; abdomen pale yellow or light blue, abdominal muscles thin. Males are larger than females and slightly raised. On the back, three strips of equal stripes are usually formed by brown spots. One line of pigment strips is visible along the midline on each side of the body. The rest of the pigment spots are evenly distributed. The abdomen is khaki-colored, the individual is large in orange, the abdomen is upward, and the swelling is not. obvious.
2, temperament: female temperament is mild, not good at jumping; vigorous and lively, good at active, struggling.
3, growth cycle: Astragalus has a sexual reversal, the initial period of the young Astragalus seedlings are all female, become male after spawning; body length of 24 cm, began to reverse the hermaphroditism.
4, the breeding season characteristics (can be accurately identified): female abdomen translucent pink, visible intra-abdominal ova, swelling, genital pores swollen, swollen, slightly transparent; male abdomen abdominal distribution of blood-like mesh, no prominent Feeling, reproductive hole redness, slightly prominent.
5. Individual differences: Individuals with a total length of 24 cm or less are females; individuals of 24 to 30 cm, 30 to 36 cm, and 36 to 42 cm account for 5.2%, 41.3%, and 90.7% of males respectively; Individuals above centimeters are male.
6. Age: Artificial breeding of scutellaria due to adequate nutrient supply and different varieties, and unusually long body length, it should be based on age to make a basic judgment: Generally within two years of age are female quails, more than three years are generally It is a hero.

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