蟹板茗荷在三疣梭子蟹体上的附着定向及种群变动  

Orientation, Attachment and Population Characteristics of the Goose Barnacle Octolasmis neptuni Living on the Gills and Mouth Appendages of the Swimming Crab Portunus trituberculatus

作　　者：薛俊增[1] 吴惠仙[2] 

机构地区：[1]杭州师范学院生物系,杭州310036 [2]浙江大学生命科学学院,杭州310012

出　　处：《生态学报》2002年第12期2091-2095,共5页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目 (3 80 0 2 8)

摘　　要：研究蟹板茗荷在三疣梭子蟹鳃及口肢上的定向、附着和种群特征 ,结果显示蟹板茗荷主要附着在三疣梭子蟹鳃的腹面 ,占 67.86% ,以在第五对鳃上的附着量最大。位于鳃腹面的蟹板茗荷主要以 0°方式定向 ,鳃背面的蟹板茗荷则主要以± 90°方式定向 ,鳃室壁上的蟹板茗荷主要以 0°方式定向。蟹板茗荷在不同的附着部位形态上有差异 ,口肢上的个体柄短、壳板厚而硬 ,鳃室里的柄长、壳板薄而软。附着于三疣梭子蟹鳃及口肢上的蟹板茗荷 ,其种群年龄结构和数量组成有明显的季节变化。Octolasmis is a special Genus in Cirripede. Octolasmis spp. attached on the gills and appendages of crab. They have formed the special biological characteristics for adapting the sessile life during the long term evolutionary process, effecting the breath, development and ingestion of hosts. Goose barnacle, O. neptuni attached on the gills and appendages of the swimming crab, Portunus trituberculatus, one of the important crab in China, effecting the growth and development of the hosts. We studied the attachment, orientation and population characteristics of the goose barnacle in order to reveal the interspecies relationship between them. About 67\^86% of the goose barnacle attached on the ventral surface of the crab gills and mainly on the 5th pair of the gills. The body length of the goose barnacle varied with the season. The dominant group, the individual body of which was 2 mm length, occurred during July^August, October^December and January in the next year. About 79\^1% of the goose barnacle, attaching on the ventral surface of the crab gills, often take the orientation at 0°. About 57 1% of the goose barnacle, attaching on the dorsal surface of the crab gills, often take the orientation at ±90°. About 66 7% of the goose barnacle, attaching on the walls of the gill chambers, often take the orientation at 0°. The morphology of the goose barnacle, attaching on different part of the hosts, differed. The individuals, attaching on the mouth appendages, had short peduncle, thick and hard scutum, whereas those individuals, attaching on the gill and gill chambers had long peduncle, thin and soft scutum. The population age distribution and population size varied significantly from season to season, indicating that the close relatonship with the growth and migration of the hosts. The high peak of the population size for goose barnacle appeared in July and August. The highest peak aroused in October^January. The lowest peak occurred in February^April.

关 键 词：蟹板茗荷 三疣子蟹 蔓足类 寄主 种群变动 附着定向 

分 类 号：S945[农业科学—水产养殖]