日本七鳃鳗胚胎发育及卵黄囊期仔鱼的异速生长
EMBRYOLOGICAL STAGES AND ALLOMETRIC GROWTH DURING YOLK-SAC LARVAE OF LAMPETRA JAPONICA (MARTENS)
摘要
Abstract
Early embryology of the Lampetrajaponica has been studied based largely on external morphology and histology.In current study,ecological experiment was conducted to investigate the allometric growth of L.japonica yolk-sac larvae.The results indicated the ovulated egg was creamy-white with the oval shape.The cleavage of zygote was holoblastic cleavage.The early embryology of L.japonica had been characterized into cleavage,blastula,gastrula,neural plate and groove,head,prehatching and hatching.The embryo breaks through the fertilization membrane at 11-12 day-post-fertilization.Newly-hatched larvae were (3.41±0.24) mm in total length and about 0.0006 g in weight.Study of the early embryology of L.japonica may provide the basis for understanding the origin and evolution development of vertebrates.During yolk-sac stage,head and tail length exhibited positive allometric growth,and trunk exhibited negative allometric growth.The inflection point was at 7 day-post-fertilization for both head and tail length.The head and tail length exhibited positive allometric growth before and after the growth inflection point and the growth was higher post the inflection point.In terms of the dimensions of organs in head,snout length,prebranchial length and branchial length exhibited positive allometric growth.The inflection point appeared at 9 day-post-hatch for snout length and at 8 day-post-hatch for branchial length,respectively.The inflection point of disc length occurred at 3 day-posthatch,and the disc length exhibited isometric allometric growth to the inflection point,then became positive allometric growth.The eye length was characterized by isometric allometric growth and had no inflection point.The postocular length exhibited negative allometric growth.The cloacal slit length exhibited positive allometric increase and hads no inflection point.The allometric growth pattern of L.japonica yolk-sac larvae enabled rapid development of the organisms which has important function to adapt to the early life stage and increases their survival rate.关键词
日本七鳃鳗/胚胎发育/卵黄囊期仔鱼/异速生长Key words
Lampetra japonica/Yolk-sac larvae/Early embryology/Allometric growth分类
生物科学引用本文复制引用
李军,韩英伦,徐磊,马庆华,宋涛,董彦娇,刘欣,逄越,李庆伟..日本七鳃鳗胚胎发育及卵黄囊期仔鱼的异速生长[J].水生生物学报,2017,41(6):1207-1217,11.基金项目
国家重大基础研究发展规划(973)计划(2013CB835304) （973）
全国海洋公益项目(201305016) （201305016）
国家自然科学基金(31170353、31202020、 31601865) （31170353、31202020、 31601865）
辽宁省教育厅项目(L201683651) （L201683651）
辽宁省高等学校杰出青年学者成长计划(LJQ2014117) （LJQ2014117）
大连市科技计划(2013E11SF056)资助[Supported by the National Program on Key Basic Research Project (973 Program,2013CB835304) （2013E11SF056）
National Marine Public Projects (201305016) （201305016）
the National Natural Science Foundation of China (31170353,31202020,31601865) （31170353,31202020,31601865）
Liaoning Provincial Department of Education Foundation (L201683651) （L201683651）
Colleges and Universities in Liaoning Province Outstanding Young Scholar Growth Plans (LJQ2014117) （LJQ2014117）
Dalian Science and Technology Program (2013E11SF056)] （2013E11SF056）
