摘要
极边扁咽齿鱼主要分布在黄河上游地区,是我国的特有种.资源调查发现:①黄河上游饵料资源丰富,极边扁咽齿鱼肠充塞度大多为4、5级.②极边扁咽齿鱼种群体长与体重的关系为W=0.009×L3.0289(R2=0.9741),表明极边扁咽齿鱼总体生长基本符合均速生长型.③在种群中,雌性个体数量占优,其中9龄以上个体全部为雌性,正金字塔型的种群年龄结构已经被破坏,低龄鱼仅占35%,表明极边扁咽齿鱼资源量呈下降趋势,年龄结构呈现一定程度的老龄化.文中对极边扁咽齿鱼的保护提出了建议.
Platypharodon extremus Herz are principally distributed in the upper reaches of the Yellow River, which is endemic species in China. Based on resource survey , it is found that： （1） The food resources is rich in the river reach, and intestines congested degree of Platypharodon extrernus Herz is most 4 or 5. （2）The relationship between length and weight of the population is as follows： W= 0. 009 × L^3.0289 （R^2=0. 9741）, indicating that the population growth belong to uniform growth type. （3）The number of females individuals dominated in the population, in which individuals over age 9 is all females. Pyramidshaped age structure of the pupulation have been destroyed, very young fish accounted for only 35%, indicating that the amount of resources is downward trend, the age structure is degree of aging. The protection measures on Platypharodon extremus Herz are put forward in paper.
出处
《西北师范大学学报（自然科学版）》
CAS
北大核心
2010年第1期84-89,共6页
Journal of Northwest Normal University(Natural Science)
基金
甘肃省技术研究与开发专项计划项目(0805TCYA021)
关键词
极边扁咽齿鱼
资源调查
种群
保护
Platypharodon extremus Herz
survey of resour
population
protection
