中国海洋大学学报（自然科学版）2018，Vol.48Issue(5)：39-50,12.DOI:10.16441/j.cnki.hdxb.20170273
许氏平鲉“特定发育期”生长与摄食特性的研究
Growth and Feeding Characteristics of Sebastes schlegelii in ‘Specific Developmental Periods’
摘要
Abstract
Under tank-rearing condition,the growth and feeding characteristics of larval,juvenile and young Sebastes schlegeliiin the ‘ specific developmental periods’ were studied.The experiments were carried out in the 8 ‘specific developmental periods’,namely primiparous larvae (stage A),4 ‘critical periods’ (stage B,E,L,N),2 ‘growth transition periods’ (stage G and O) and juvenile stage (stage P) in the early developmental period of Sebastes schlegelii.Morphology,growthand feeding indexesof larvae in the 8 development periods were investigated.The results showed that the growth rates of the 8 indexes each for fry of S.Schlegeliifollowed a rising trend,and the indexes can be fitted in 2-3 straight lines with inflection points occuring at some ‘specific development periods’.The total length,body weight,body length,and preanal length increased following a three-step linear growth curve with 2 inflection points (stage G and O) as the boundary;body height increased following a three-step linear growth curve with 2 inflection points (stage E and O) as the boundary;eye diameter increased following a two-step linear growth curve with one inflection point (stage G) as the boundary;and snout length increased following a two-step linear growth curve with one inflection point (stage E) as the boundary.The feeding indexes of fry also changed significantly at some ‘specific development periods’.The feeding incidence and satiation rate were at a low level in stage A,began to rise rapidly from stage B,and maximized to 100％after stage N,and degree of digestive tract fullness was all of level 3-4 after stage N,satiation in stages A though P was of rising trend and increased greatly after stage G.The daily ration in stages B through P showed an upward trend as a whole,increased faster from stage G,and reached significant value (P＜0.05) at stages G,L,N and O.Feeding rhythm of fry was daytime feeding type with two peaks of twilight,feeding was active in the daytime than at night,and the two feeding peaks appeared at 6:00 and between 15:00 and 21:00.Digestion time had the overall trend of rising to falling and to rising again along with the growth and development of the fry,while satiation feeding time kept declining as a whole.Knowing the change law of the growth and feeding characteristics in the early stage of S.schlegelii,it can be effective to guide the management of water environment and feed fry in the ‘specific developmental periods’ thus to promote the growth,feeding and survival rate of fry in the process of artificial seedling.关键词
许氏平鲉/特定发育期/生长/发育/摄食Key words
Sebastes schlegelii/specific developmental periods/growth/development/feeding分类
农业科技引用本文复制引用
王仁龙,王志宝,姜海滨,杜荣斌,刘立明..许氏平鲉“特定发育期”生长与摄食特性的研究[J].中国海洋大学学报（自然科学版）,2018,48(5):39-50,12.基金项目
山东省现代农业产业技术体系项目(SDAIT-12-03) （SDAIT-12-03）
国家鲆鲽类产业技术体系项目(CARS-50-Z09) （CARS-50-Z09）
烟台大学博士启动基金项目(HX15B37)资助 Supported by Shandong Province Modern Agricultural Technology System(SDAIT-12-03) （HX15B37）
National Technology System for Flatfish Culture Industry(CARS-50-Z09) （CARS-50-Z09）
Doctoral Starting Fund of Yantai University (HX15B37) （HX15B37）
