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.
出处
《水生态学杂志》
北大核心
2012年第6期109-113,共5页
Journal of Hydroecology
关键词
花鱼骨
种群
形态学
袁河
Hemibarbus maculates
population
morphology
Yuanhe River
