摘要
真鲷仔鱼视网膜在孵后３ｄ功能化，变态以前，仔鱼眼睛为纯视锥视网膜．孵后２８ｄ，视杆细胞出现，单锥细胞开始融合为双锥细胞；同时，暗适应条件下的色素指数明显下降，视网膜运动反应出现，当发育到４６ｄ视网膜中单锥细胞和双锥细胞的排列已呈方形镶嵌，视锥细胞密度由３ｄ时的４４个／１００μｍ降为４６ｄ的１９个／１００μｍ，眼睛的焦距由３ｄ时的０．０５７ｍｍ增加到４６ｄ的０．６０ｍｍ，代表现敏度的最小分辨角由３ｄ的２３７’降为４６ｄ的６６’．
The visual system of the red sea bream larva becomes functional at 3 dafter hatching.There is only a pure-cone retina in larva up to metamorphosis. At 28 d,therods appear,the size of some single cones alter,and then fuse and form twin cones,theretinomotor responses appear at the same time,At 46 d,a well-differentiated retina developswith single cones,twin cones and rods,and Cones arrange in a square mosaic pattern. Thedensity of cones declines with age from 44 nos. /100μm at 3 d to 19 nos. /100μmat 46d.Butthe focal length of eyes increases with age from 0.057 mm at 2 d to 0.60 mm at 46 d afterhatching.And the acuity(expressed as minimum separable angle)improves with age fromabout 237’at 3 d to 66’at 46 d.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1994年第6期857-862,共6页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金及福建省自然科学基金
关键词
真鲷
视网膜运动反应
发育
Pagrosomus major,Retina,Retiomtormotor,Development,Feeding
