建阳市崇阳溪鱼类资源现状调查与保护对策

2007年10月至2012年2月对崇阳溪鱼类资源进行了调查，共设4个断面采样。结果共采集到鱼类75种，分属5目16科54属。种类组成以鲤形目鱼类为主，共4科39属51种，占总种数的68．0%，鲶形目次之，共4科6属11种，占14．7%；按科统计，鲤科鱼类最多，共40种，占总种数的53．3%，鮠科次之，共7种，占9．3%。4个断面渔获物的鱼类种类组成基本相同，但单种鱼类重量占总渔获物重量的百分比大于5%的主要种类组成差异较大。4个断面的单船（排）平均日捕捞量不同，回瑶断面的最高，芦上断面的最低。渔获物中个体小型化、低龄化现象严重。

Investigation and protection on fish resource of Chongyang river in Jianyang City

The composition and distribution of fish was investigated at 4 sections sampling in Chongyang river during October of 2007 to February of 2012. The results showed that a total of 75 fish species were collected, belonging to 5 orders, 16 families, 54 genera. Cypriniformes constitutes the dominant component of species composition, and is consist of 4 families, 39 genera and 51 species, accounting for 68% of the total species, Siluriformes rank is the second including 4 families, 6 genera and 11 species, accounting for 14. 7% of the to-tal species. According to the family of statistics, Cyprinidae consists of 40 species and is the most common species, accounting for 53. 3% of the total species, Bagridae is the second common species, consisting of 7 species, accounted for 9. 3% of the total species. The species composition collected from 4 sections is almost the same, but the main species composition that the ratio of single species of fish to the total catch in weight in this river is greater than 5% are different obviously. The average daily catch of fish for single ship or bamboo rafts in 4 sections is different, the highest is Huiyao section, and the lowest is Lushang section. Individual fish caught in size and age tends to be miniaturization and young.