盐度及pH对星斑裸颊鲷受精卵孵化和仔鱼耐饥饿能力的影响  

Effects of Salinity and pH on Hatching,Enduring Hunger Ability and Larval Activity of Lethrinus nebulosus

作　　者：周立斌[1] 曾丽丽[2] 王安利[1] 张海发[3] 刘付永忠[3] 

机构地区：[1]华南师范大学生命科学学院广东省高等学校生态与环境科学重点实验室,广州510631 [2]惠州学院生命科学系,惠州516007 [3]广东省大亚湾水产试验中心,惠州516081

出　　处：《动物学杂志》2008年第5期114-119,共6页Chinese Journal of Zoology

基　　金：国家科技支撑计划课题(No.2007BAD29B04);广东省重大科技兴海(兴渔)项目(No.A200501G01);广东省科技计划项目(No.2007B020708013)

摘　　要：比较观察了不同盐度（0、5‰、10‰、15‰、20‰、25‰、30‰、35‰、40‰和45‰）及不同pH（5.5、6.0、6.5、7.0、7.5、8.0、8.5、9.0和9.5）条件下,星斑裸颊鲷（Lethrinus nebulosus）受精卵的孵化时间、孵出期、孵化率、畸形率及一定时间内（24h和48h）仔鱼成活率,并且在以上盐度和pH条件下对星斑裸颊鲷初孵仔鱼进行耐饥饿试验,测定其不投饵存活指数（survival activityindex,SAI）。结果表明,只有SAI值大于3的星斑裸颊鲷仔鱼才有可能被进一步培育成苗,低于3的将在数天内死亡;星斑裸颊鲷受精卵孵化的适宜盐度范围是10‰～45‰,最适宜盐度范围15‰～40‰,适宜pH是6.5～9.0,最适宜pH范围7.0～8.5;初孵仔鱼生存的适宜盐度范围是10‰～40‰,最适宜盐度范围20‰～25‰,适宜pH是5.5～9.5,最适宜pH范围7.0～8.5。The incubating period, hatching period, hatching rate of fertilized egg, deformation rate, larvae survival rate within a certain period of time （24 h and 48 h）and survival activity index （SAI）of newly hatched larvae of Lethrinus nebulosus were observed at salinities of 0,5‰, 10S, 15‰, 20‰ ,25‰ ,30‰ ,35‰ ,40‰ and 45‰, and pH values of 5.5,6.0,6.5,7.0,7.5,8.0,8.5,9.0,9.5. The results showed that the incubating period and hatching period of L. nebulosus demonstrated a variation tendency of shortening first and then lengthening within a certain range of salinity and pH values;hatching rate and larvae survival rate within a certain period of time （24 h and 48 h） became higher in salinity from 10‰ to 45‰;hatching rate and larvae survival rate within a certain period of time （24 h and 48 h） became higher in pH values from 6.5 to 9.0. The SAI of newly hatched larvae of L. nebulosus became higher in salinity from 10‰ to 40%v;the SAI of newly hatched larvae of L. nebulosus became higher in pH values from 6.0 to 9.0;larvae only SAI values higher than 3 could be reared to finish their metamorphosis and become young fish. The others would die in several days. Taken together, results showed that： Salinity from 10%v to 45%o, pH from 6.5 to 9.0 are suitable for hatching and the optimum is salinity from 15‰ to 40‰, pH from 7.0 to 8.5, respectively;Salinity from 10‰ to 40‰,pH from 5.5 to 9.5 are suitable for larvae survival and the optimum is from 20‰ to 25‰ for salinity, and from 7.0 to 8.5 for pH, respectively.

关 键 词：星斑裸颊鲷 盐度 PH 不投饵存活指数 

分 类 号：S917.4[农业科学—水产科学]