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WANG Li-Qing, CHEN Yang-Jian. THE COMPLETE LARVAL DEVELOPMENT OF ERIOCHEIR LEPTOGNUTHUS REARED IN THE LABORATORY[J]. ACTA HYDROBIOLOGICA SINICA, 2003, 27(5): 457-462.
Citation: WANG Li-Qing, CHEN Yang-Jian. THE COMPLETE LARVAL DEVELOPMENT OF ERIOCHEIR LEPTOGNUTHUS REARED IN THE LABORATORY[J]. ACTA HYDROBIOLOGICA SINICA, 2003, 27(5): 457-462.
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THE COMPLETE LARVAL DEVELOPMENT OF ERIOCHEIR LEPTOGNUTHUS REARED IN THE LABORATORY

  • Shanghai Fisheries University, 200090;
    2. Government of Haishan town Yuhuan County, Zhejiang province, 317105

  • Received Date: December 13, 2002
  • Rev Recd Date: March 09, 2003
  • Published Date: September 24, 2003
    Graphical Abstract
    • Abstract
  • Eriocheir leptognathus is widely distributed in brackish waters from Fujian province to the eastern coast of Korea peninsula,especially abundant in Changjiang estuary. Its larval morphological characteristics,breeding season and larval living environment are similar to those of E. sinensis. The megalops of two species are difficult to be distinguished from each other in the natural waters,so that farmers suffer economic loss in crab culture due to misidentification. It is necessary to investigate the larval development of E. leptognathus. This paper deals with the complete larval development of E. leptognathus,describes the larvae reared in the laboratory in detail. The berried females of E. leptognathus are obtained from Sanjia seaport of Shanghai. The larval culture is carried out under the temperature of 18—25℃,salinity of 18‰—20‰ and photo intensity of 200—600lx. Under these conditions,E. leptoganathus passes 5 zoeal stages before metamorphosis to the megalopal stage. The megalopa and crab I instar are attained in minimum 15 and 23 days after hatching,respectively. Morphological characteristics of the first zoea and megalopa of E. leptognathus are compared with those of E. sinensis. The first zoea of the two species can be easily distinguished from each other by the form of the second antenna and the knobs of the abdominal somites. The exopode of the second antenna of E. leptognathus is about 1/15 in length of protopodal process and has two approximately equal simple setae on terminal,while of E. sinensis is about 1/3—1/2 in length of protopodal process and has two unequal spines near the distal end. There are 2 pairs of dorso-lateral knobs on the second to third abdominal somites of E. leptognathus while there are 3 pairs on the second to fourth abdominal somites of E. sinensis. The main difference of the two species megalopae exists in body length,the shape of rostrum,dactylus of pereiopods 2—4. the plumose setae on exopods of pleopods,setation of other appendages and of telson. Sakai treated it as another genus Neoeriocheir,which is supported by Guo et al. Dai aiyun and Qiu gaofeng considered that E. leptognathus belongs to Eriocheir. There are denticles on rostral,dorsal spines on the carapace of the first zoea,and there are two indistinctly round lobs on the postero-dorsal carapace of the megalopa of E. leptognathus,which are considered as the typical characteristics of the larvae of Eriocheir from other genuses.
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    • References (1)
  • [1]
    Liang X Q,Yan S L.,Zheng D C, et al. The complete larval development of Eriocheir sinensis H. Milne-Edwards)[J]. Acta Zootaxonomica Sinica,1974,20(1):61-68. [梁象秋,严生良,郑德崇等.中华绒螯蟹(Eriocheir sinensis H. Milne-Edwards)的幼体发育. 动物分类学报,1974,20(1):61—68][2] Lai H Z,Shi Z Y,You X P.The complete larval development of Eriocheir japonica De Haan in the laboratory[J]. Taiwan Fisheries Science,1986. 13(2):12—21. [赖弘智,施志昀,游祥平. 室内孵化日本绒螯蟹(Eriocheir japonica De Haan)的幼体发育幼苗变态研究. 台湾渔业科技,1986. 13(2):12—21][3] NG N K,Dai A Y,Guo J Y, et al. The complete larval development of the Southern Chinese mitten crab,Eriocheir hupuensis Dai. 1991. (Decapoda,Brachyura,Grapsidae)reared under laboratory conditions[J]. Crustaceana. 1998. 71(5):493—517[4] Kim C H,Hwang S G. The complete larval development of the mitten crab Eriocheir sinensis H. Milne Edwards,1853(Decapoda,Brachyura,Grapsidae)reared in the laboratory and a key to the known zoeae of the Varuninae[J]. Crustaceana,1990. 68(7):793—812[5] Kim C H, Hwang S G. The complete larval development of Eriocheir japonica De Haan(Crustacea,Brachyura,Grapsidae)reared in the laboratory[J]. Korean J. Zool,1995,33:411—427[6] Shy J Y, Yu H P. ,Complete larval development of the mitten crab Eriocheir rectus Stimpson,1858 (Decapoda,Brachyura,Grapsidae)reared in the laboratory[J]. Crustaceana,1992,63:277—290[7] Sakai T. Descriptions of new genera and species of Japanese crabs,together with systematically and biogeographically interesting species[J]. Res. Crust. ,1983,12:3—23[8] Guo J Y,Ng N K,Dai A Y. Et al. The taxonomy of three commercially important species of mitten crabs of the genus Eriocheir de Haan,1835(Crustacea:Decapoda:Brachyura:Grapsidae)[J]. The raffles bulletin of zoology. 1997,45(2):445—476[9] Dai,A Y. A preliminary cladistic analysis on Eriocheir (Crustacea:Decapoda)[J]. Acta Zootaxonomica Sinica. 1988,13(1):22—25. [戴爱云. 绒螯蟹属的支序分类学的初步分析. 动物分类学报,1988,13(1);22—25][10] Qiu G F,Xu Q T,Wang L Q,et al. Molecular taxonomy and phylogeny of four species of Eriocheir(Decapoda:Brachyura:Grapsidae)[J]. Acta zootaxonomica Sinica. 2001, 47(6):640—647. [邱高峰,徐巧婷,王丽卿,等. 四种绒螯蟹分子分类与进化的研究. 动物分类学报,2001,47(6):640—647]

    Liang X Q,Yan S L.,Zheng D C, et al. The complete larval development of Eriocheir sinensis H. Milne-Edwards)[J]. Acta Zootaxonomica Sinica,1974,20(1):61-68. [梁象秋,严生良,郑德崇等.中华绒螯蟹(Eriocheir sinensis H. Milne-Edwards)的幼体发育. 动物分类学报,1974,20(1):61—68][2] Lai H Z,Shi Z Y,You X P.The complete larval development of Eriocheir japonica De Haan in the laboratory[J]. Taiwan Fisheries Science,1986. 13(2):12—21. [赖弘智,施志昀,游祥平. 室内孵化日本绒螯蟹(Eriocheir japonica De Haan)的幼体发育幼苗变态研究. 台湾渔业科技,1986. 13(2):12—21][3] NG N K,Dai A Y,Guo J Y, et al. The complete larval development of the Southern Chinese mitten crab,Eriocheir hupuensis Dai. 1991. (Decapoda,Brachyura,Grapsidae)reared under laboratory conditions[J]. Crustaceana. 1998. 71(5):493—517[4] Kim C H,Hwang S G. The complete larval development of the mitten crab Eriocheir sinensis H. Milne Edwards,1853(Decapoda,Brachyura,Grapsidae)reared in the laboratory and a key to the known zoeae of the Varuninae[J]. Crustaceana,1990. 68(7):793—812[5] Kim C H, Hwang S G. The complete larval development of Eriocheir japonica De Haan(Crustacea,Brachyura,Grapsidae)reared in the laboratory[J]. Korean J. Zool,1995,33:411—427[6] Shy J Y, Yu H P. ,Complete larval development of the mitten crab Eriocheir rectus Stimpson,1858 (Decapoda,Brachyura,Grapsidae)reared in the laboratory[J]. Crustaceana,1992,63:277—290[7] Sakai T. Descriptions of new genera and species of Japanese crabs,together with systematically and biogeographically interesting species[J]. Res. Crust. ,1983,12:3—23[8] Guo J Y,Ng N K,Dai A Y. Et al. The taxonomy of three commercially important species of mitten crabs of the genus Eriocheir de Haan,1835(Crustacea:Decapoda:Brachyura:Grapsidae)[J]. The raffles bulletin of zoology. 1997,45(2):445—476[9] Dai,A Y. A preliminary cladistic analysis on Eriocheir (Crustacea:Decapoda)[J]. Acta Zootaxonomica Sinica. 1988,13(1):22—25. [戴爱云. 绒螯蟹属的支序分类学的初步分析. 动物分类学报,1988,13(1);22—25][10] Qiu G F,Xu Q T,Wang L Q,et al. Molecular taxonomy and phylogeny of four species of Eriocheir(Decapoda:Brachyura:Grapsidae)[J]. Acta zootaxonomica Sinica. 2001, 47(6):640—647. [邱高峰,徐巧婷,王丽卿,等. 四种绒螯蟹分子分类与进化的研究. 动物分类学报,2001,47(6):640—647]
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