袁河花鱼骨的种群特征  

Population Characteristics of Hemibarbus maculates in Yuanhe River

作　　者：庹云[1] 

机构地区：[1]江西宜春学院生命科学与资源环境学院,江西宜春336000

出　　处：《水生态学杂志》2012年第6期109-113,共5页Journal of Hydroecology

摘　　要：对采集自袁河(宜春市袁州区段)的140尾花鱼骨的形态特征、生物学特性进行测量分析。鳍式:背鳍Ⅲ,7～8;臀鳍Ⅲ,6;胸鳍Ⅰ,16～18;腹鳍Ⅰ,7～8。食物以摇蚊幼虫、藻类和软体动物为主。由1～5龄组成,2龄组比例最高,占45%。2龄生长速度最快。体长与年龄关系L=2.828t+9.732,体重与年龄关系W=5.690t2+14.74t+15.40,体长与体重关系W=2.2×10-2L2.916。个体绝对怀卵量1602～47477粒,个体绝对繁殖力与体长的回归关系F=1996L-23159,单位体长怀卵量114.23～1684粒/cm,单位体重怀卵量21～288粒/g。袁河花鱼骨种群的年龄结构不合理,个体小型化。捕捞规格应为体长大于21.45cm、体重大于133.3g。The biological characteristics of Hemibarbus maculates were studied by using the 140 specimens collect- ed in the period between March 2009 and June 2010 from the Yuanhe River in Jiangxi, China. Results showed that the fin type of H. maculatus is D. Ⅲ-7 （8） , A. Ⅲ-6. The main preys of H. maculates adults were chironomid lar- vae, alga and mollusk. The population of H. maculates was composed of one-year-old to five-year-old individuals. Two-year-old 11. maculates had the highest proportion, which was 45 % , and were the fastest growing individuals. Relationships between body length, body weight and age were expressed as formulas： L = 2. 828t ＋ 9. 732 and W = 5. 690t2 ＋ 14.74t ＋ 15.40, respectively. Relationship between body length and body weight was expressed as the formula： W = 2.2 · 10-2L2916. The individual absolute fecundity ranged from 1602 to 47477 eggs. Relationship between fecundity and body length was indicated by the equation： = 1996L-23159. The individual relative fecundities by body length were 114.23 to 1684 eggs/cm, and by body weight were 21 to 288 eggs/g. The age structure of H. maculatus population in Yuanhe River was unreasonable. The capture size of H. maculatus should be longer than 21.45em and heavier than 133.3 g.

关 键 词：花鱼骨 种群 形态学 袁河 

分 类 号：S917[农业科学—水产科学]