摘要
研究了以浮游动物为饵料日饱食投喂3次（F3）、2次（F2）、1次（F1）等不同投喂频率对3-32日龄黄颡鱼仔稚鱼生长和存活的影响，并比较了单独投喂浮游动物（I组）、水蚯蚓（Ⅱ组）及两者混合投喂（Ⅲ组）对4-34日龄黄颡鱼生长和存活的影响．结果表明：（1）投喂频率对黄颡鱼仔稚鱼生长具有显著影响，F3组个体平均全长、体重显著高于F2、F1组；3-29日龄全长和体重特定生长率（SGR）与投喂频率间直线正相关（SGR1=1．0366D＋3．2347，R^2=0．9025；SGRw=3．0013D＋9．4829，R^2=0．8833），投喂越多则生长越快．（2）17-25日龄时Ⅱ组生长显著低于I、Ⅲ组；28日龄Ⅱ组生长仍显著低于Ⅲ组，但与I组间没有显著差异；到34日龄，Ⅲ组生长最快，Ⅱ组生长超过I组，3组间生长差异显著（P〈0．05），表明28日龄后水蚯蚓为黄颡鱼更合适的饵料．（3）饵料种类对34日龄内的仔稚鱼成活率没有影响．试验表明，日饱食3次更有利于黄颡鱼仔稚鱼的生长；28日龄后投喂饵料应增加水蚯蚓；充足的适口饵料是影响黄颡鱼苗种生长的重要因素．
This study focused on how feeding frequency and different feeds affected the growth and survival rate of larvae and juvenile of yellow catfish Pelteobagrus fulvidraco. Trial 1 was conducted to investigate the effects of different feeding frequencies [satiation feeding once （F1）, twice （F2） and 3 times （F3） per day] with zooplankton on the growth and survival. Trial 2 was to investigate the effects of different feeds （feeding zooplanktons （group I ）, feeding zoobenthos （group Ⅱ）, and feeding zooplanktons and zoobenthos together （group Ⅲ） on the growth and survival. The results showed： ① Within 3-29 d after hatching, with increasing feeding frequency, specific growth rate of total length and wet weight increased significantly in linear style （SGR1=1.0366D＋3.2347, R^2=0.9025; SGRw=3.0013D＋9.4829, R^2=0.8833）; ② With 17-25 d, group Ⅱ grew slower than group I and group Ⅲ, but there was no difference between group II and group I up to 28 d, Furthermore, on d 34 the growth was different among the 3 groups, that is, group Ⅲ grew fastest, followed by group Ⅱ and group I ; ③ Different feeds could not affect the survival rate within 3-34 d after hatching. It can be concluded that feeding 3 times a day is better than once or 2 twice a day, and feeding with zoobenthoes is better than with zooplankton after 28 d. Fig 5, Tab 2, Ref 18
出处
《应用与环境生物学报》
CAS
CSCD
北大核心
2009年第1期78-81,共4页
Chinese Journal of Applied and Environmental Biology
基金
国家科技支撑计划项目(No.2007BAD37B02)
湖北省“十一五”重大科技攻关项目(No.2006AA203A02)
国家社会公益性专项研究(No.CZB2060302-200707)资助~~
关键词
投喂频率
饵料
生长
存活
仔稚鱼
黄颡鱼
feeding frequency
feed
growth
survival
yellow catfish
Pelteobagrusfulvidraco
