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本文对泥鳅生物学进行了初步研究。泥鳅的体色依生活环境不同略有变化。侧线鳞122—144个,平均134个。在水温升至28℃以上时,白天才钻入淤泥;离开水1—6小时能存活;对灯光照射无明显趋光或避光反应,平均3—5厘米体长个体的日增长率为5.84%,口下位,触须5对,鳃粑16—18根,齿式:13—15/15—13,“I”型胃,肠粗短,中部有3—5个螺旋状弯曲,食物团中腐植质出现率最高,在动物饵料中,小型甲壳动物出现率最高,在植物性饵料中,绿藻出现率较高,对动物性饵料有明显的喜好性;7—12厘米长个体的日平均摄食饱满指数在10左右;在一昼夜中有两个明显的摄食高峰,即7—10点钟和16—18点钟,5点钟左右有一个摄食低潮;对动物性饵料的消化速度比植物性饵料快,消化藻约需7小时,蚯蚓——4.5小时,浮游植物——4小时。
In this paper, a preliminary study of loach biology. Loach body color varies slightly depending on the living environment. Sideline scales 122-144, an average of 134. In the water temperature rose above 28 ℃, the day before drilling into the mud; leave the water 1-6 hours to survive; no obvious light or dark light exposure, an average of 3-5 cm body length of individual growth rate 5.84%, lower mouth, tentacles 5 pairs, gill 粑 16-18, gear type: 13-15 / 15-13, “I” type stomach, short and thick intestine, the central 3-5 helical bending, food groups The highest incidence of humus in animal feed, the highest incidence of small crustaceans, plants in the diet, the higher incidence of green algae, animal feed obvious preference; 7-12 cm long individual day The average food fullness index at about 10; in a day and night there are two obvious peak food intake, that is, 7-10 o’clock and 16-18 o’clock, about 5 o’clock there is a low ebb; feed on animal digestion faster than plants Fast food, digestion of algae takes about 7 hours, earthworms - 4.5 hours, phytoplankton - 4 hours.