空间结构对鳡幼鱼驯食及生长的影响  被引量:4

Effects of habitat size on weaning success and growth in juvenile yellowcheek carp(Elopichthys bambusa)

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作  者:宗克金[1] 樊启学[1] 胡培培[1] 刘汝鹏[1] 姚昌林[1] 王昆鹏[1] 

机构地区:[1]华中农业大学水产学院,武汉430070

出  处:《华中农业大学学报》2014年第1期97-102,共6页Journal of Huazhong Agricultural University

基  金:国家科技支撑计划项目(2012BAD25B00;2012BAD25B08)

摘  要:试验设5组,对鲢进行驯食的驯食空间分别为0.5m×0.5m×0.6m(S1组)、1.0m×1.0m×0.6m(S2组)、1.5m×1.5m×0.6m(S3组)、2.0m×2.0m×0.6m(S4组)、3.0m×3.0m×0.6m(S5组),每组3个平行。随机选取初始体质量为0.64±0.05g鳃幼鱼转入各网箱中,初始放养密度为每m3500尾,试验共28d。结果显示:驯食成功率(WSR)随着驯食空间的增大呈现先升高后降低的趋势,其中S2组最高,S3组其次,S1组最低;累积死亡率(MR)(30457日龄(daysafterhatching,DAH))以S5组最高(P〈0.05),S3组最低;总残食率(CR)(30-57DAH)随着驯食空间的增大而升高;S1组SGR显著低于其他组(P〈0.05),S2、S3组体质量变异系数(CV)显著低于S1、S4、S5组(P〈0.05)。在该试验条件下,综合考虑驯食成功率、驯食效率和操作强度,鲢最佳驯食空间为1.5m×1.5m×0.6m。The effects of space size on the weaning success and growth performance of juvenile yel- lowcheek carp (Elopichthys bambusa) were investigated. Five groups were assigned in different size net cages (length × width × height) :0.5 mX0.5 reX0.6 m(S1),l. 0 m×1.0 m×0. 6 m(S2),1.5 m× 1.5 m×0. 6 m(S3),2.0 m×2.0 m×0. 6 m(S4),3.0 m×3.0 m×0. 6 re(S5) and each group contained three replications. The original density of fry (0. 64-0.05 g) in each net cage was 500 inds m a. The weaning success rate (WSR) increased first and then decreased with the increasing of space size, with the highest WSR in S2 and the lowest WSR in S1. The cumulative mortality rate (MR) (30--57 DAH) was highest in S5 and lowest in $3 (P〈0. 05). The total cannibalism rate (CR) (30-57 DAH) increased with the increasing of space size. The specific growth rate (SGR) in S1 and coefficient of variation (CV) of body weight in both S2 and S3 were significantly lower than those in other groups (P〈0. 05). The optimum size of net cage for the weaning of juvenile yellowcheek carp was 1.5 m× 1.5 m×0. 6 m based on the comprehensive results of WSR,weaning efficiency and manipulation strength.

关 键 词: 驯食 空间结构 生长 残食 

分 类 号:S965.89[农业科学—水产养殖]

 

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