摘要
为了解大鳞副泥鳅(Paramisgurnus dabryanus)胚胎及仔鱼对盐度的适应性,将发育至原肠期的胚胎分别放置于盐度为0、2、4、6、8、10的水体中培育,统计胚胎的孵化时间、孵化率以及仔鱼的畸形率、成活率、特定生长率及卵黄囊吸收率,并测定初孵仔鱼的不投饵存活系数(Survival activity index,SAI)。结果显示:1)盐度为2~4时,胚胎孵化时间显著短于对照组(P<0.05);孵化率在盐度为4时最高,但与对照组差异不显著(P>0.05);2)初孵仔鱼的畸形率随盐度升高而逐渐增加;3日龄(Days after hatching,dah)仔鱼成活率则随盐度升高逐渐降低;3)初孵仔鱼全长随盐度升高先下降后上升,而3 dah仔鱼的则随盐度升高而下降,其特定生长率和卵黄囊吸收率呈现先升后降的趋势;4)随盐度升高,SAI先升后降,盐度为4时达最大。综上,大鳞副泥鳅胚胎发育及仔鱼生长的适宜盐度为0~4。
In order to understand the adaptability of embryo and larvae of Paramisgurnus dableanus to salinity, we bred the gastrula embryos in water at salinity of 0, 2, 4, 6, 8 and 10, then investigate the effect of salinity on the hatching period, hatching rate, abnormality rate, survival rate, specific growth rate(SGR), yolk sac absorption and survival activity index(SAI). The results show that: 1) The incubation period was significantly shorter than that of the control group at salinities of 2 and 4(P<0.05). The incubation rate was highest at salinity of 4, not significantly different from the control group(P>0.05). 2) The abnormality rate of the newly hatched larvae increased with the increase of salinity, while the survival rate of larvae of 3 dah(Days after hatching)decreased. 3) The total length of newly hatched larvae decreased first and then increased, while that of larvae of 3 dah decreased with the increasing salinity. The SGR and yolk sac absorption rate increased first and then decreased. 4) The survival activity index(SAI) of the larvae increased first and then decreased with the increase of salinity, and reached the maximum at salinity of 4.These results indicate that the optimal salinity for embryo development and larval growth of P. dableanus is 0-4.
作者
陈建华
李雪
赵建
朱洪赓
王海华
朱明
CHEN Jianhua;LI Xue;ZHAO Jian;ZHU Honggeng;WANG Haihua;ZHU Ming(Jiangsu Ocean University/Jiangsu Key Laboratory of Marine Biotechnology,Lianyungang 222005,China;Pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences/Key Laboratory of Tropical&Subtropical Fishery Resource Application&Cultivation,Ministry of Agriculture and Rural Affairs,Guangzhou 510380,China;Jiangxi Fisheries Research Institute/Nanchang Key Laboratory of Special Aquatic Breeding and Healthy Aquaculture,Nanchang 330039,China)
出处
《南方水产科学》
CAS
CSCD
北大核心
2022年第4期112-118,共7页
South China Fisheries Science
基金
江苏省重点研发计划(现代农业)(BE2018387)
江西省现代农业产业技术体系建设专项资金资助(JXARS-10)
农业农村部热带亚热带水产资源利用与养殖重点实验室开放课题(2019PR03)。
关键词
大鳞副泥鳅
盐度
胚胎发育
仔鱼
不投饵存活系数
Paramisgurnus dabryanus
Salinity
Embryonic development
Larvae
Survival activity index(SAI)
