渔业科学进展2012，Vol.33Issue(1)：34-39,6.
大菱鲆胚胎和仔稚鱼的热刺激耐受能力
Study on the thermal tolerance of embryos and larvae of turbot Scophthalmus maximus
摘要
Abstract
To study the effect of high temperature stress on the early development of tur-bot Scophthalmus maximus , the thermal tolerance of five early developmental stages of S. Maximus was studied. The hatching stage embryo, yolk-sac larvae (0 days post hatching,0 dph ), preflexion larvae (10 dph), flexion larvae (25 dph) and juvenile (50 dph) of turbot were subjected to various temperatures from 22~33℃ for 2-hour heat shock, and then transferred to seawater at initial temperature (17. 5℃) for 60～ 84 h. The mortality, larvae hatching rate andabnormal rate were recorded continuously. The results showed the sub-lethal temperature of early developmental stages of turbot were 24℃ , 23℃ , <22℃ , 28℃ , 28℃ , respectively; the 50% mortality (LT50) temperature were 26℃ , 28℃ , 22℃ , 29℃ and 29℃ , respectively; and lethal temperature were 30℃ , 29℃ , 27℃ , 30℃ and 30℃ , respectively. Based on the experimental mortalities of turbot by heat shock after 24 h and 48 h, the order of thermal tolerance of turbot at five stages was 10 dph < embryo <0 dph<25 dph<50 dph. These results indicated that the thermal tolerance of turbot increased with the development and growth during the first 50 dph. The stage of 10 dph, the swim bladder developing stage, is the low-ebb period of thermal tolerance, and the larvae are sensitive to temperature heat shock at this stage.关键词
大菱鲆/胚胎/仔稚鱼/热刺激Key words
Scophthalmus maximus/Embryos/Larvae/Thermal tolerance of heat shock分类
生物科学引用本文复制引用
关健,郑永允,刘洪军,雷霁霖,张全启,官曙光..大菱鲆胚胎和仔稚鱼的热刺激耐受能力[J].渔业科学进展,2012,33(1):34-39,6.基金项目
山东省农业良种工程项目"工厂化适养品种选育"和国家鲆鲽类产业技术体系建设项目(nycytx 50)共同资助 （nycytx 50）
