【摘要】 <正> 关于浙江沿海潮间带软体动物生态的研究,仅有少数学者在研究潮间带生物生态报告中涉及,尚无专题研究。作者于1982年2—6月和1983年1—10月对鱼山列岛潮间带软体动物进行了较系统的调查研究,其中区系研究和裸鳃类的记录已发表。本文仅就生态学部分作一初步报道,目的在于为浙江沿海潮间带生态学研究、环境保护和水产资源开发利用提供一些基础资料。更多还原

【Abstract】 Yushan Island is situated on the middle part of the Zhejiang coast, 122°13’30" to 122 17’30" E 28°51’15’’ to 28°56’15" N. It consists of about twenty islets and reef. An investigation on mollusca fauna and ecological distribution was carried out by the Zhejiang College of Fisheries, from February to June 1982 and January to October 1983.In this paper, 106 species of intertidal zone mollusca in Yushan Islands are reported, belonging to 4 classes, 14 orders and 52 fimilies, among which over 40 species are chief economic species.The vertical distribution of intertidal mollusca should be classified into two types:1. Rock ecotype: Two communities are found at the high zone: (1) Littorina brevieu-la Tectarium granularis community and (2 ) L. brevicula Monodonta labio community. Three communities at midzone: ( 1 ) Liloophura japonica Septifer virgatus community, ( 2 ) Ostrea echinata Thais claviger Barbatia decussata Community and ( 3 ) Chlorostomoarusticum 0. echinata community. Two communities at low-zone: (1) Thais luteostoma Modiolus barbatus community and (2) Serpulorbis "imbricota Mytilus crassitesta community. 2 . Piece rocky, gravel and sand ecotype: Two communities are found at the high zone: ( 1 ) L. brevicula community and (2) Monodonta labio Notoacmea schrencki comm-unity. N. schrencki M. labio community at midzone, Chlorostoma rusticum M. labio community at low-zone.The sequence of the seasonal biomass of organisms is as follows: spring (257.09g/m2) >winter (224.72 g/m2) >autumn (151.21 g/m2) >summer (144.77 g/m2) in rock ecotype, and spring (313.36 g/m2) >winter (296.81 g/m2) >summer (238.15 g/m2) >autumn (118.18 g/m2) in piece rocky, gravel and sand ecotype. The sequence of the seasonal biomass of perch density (individual number/m2) is as follows; spring (299.5) >winter (272.0) > qutumn (223.2)>summer (165.7) in rock ecotype, and autumn (610.0) >winter (601.1) >spring (492.7) >summer (293.9) in piece rocky, gravel and sand ecotype.更多还原