水产学报2011，Vol.35Issue(10)：1481-1487,7.DOI:10.3724/SP.J.1231.2011.17418
三疣梭子蟹蜕皮周期的分期
Molt staging in the swimming crab Portunus trituberculatus
摘要
Abstract
Swimming crab, Portunus trituberculatus as a fashionable table delicacy is one of the most important fishing and aquaculture species of crab along the coast of China. Molting too frequently and molting attempted are commonly found during its molting process. Therefore, it is very important to investigate the molt cycle of the swimming crab in order to provide the background information for the production and management of the species. Observations of morphological changes were successfully used for the study of defining molt stages of the swimming crab. The molt cycle of the swimming crab was divided into four basic periods:postmolt,intermolt,premolt and molt. The results indicated that the postmolt period was subdivided into stage A (parts of the body flaccid), stage B( dorsal carapace edge hard, branchial and cardiac regin still soft)based on shell rigidity changes,and the premolt period was divided into substage D0 (0 <R≤0.4),substage D1 (0.4 < R≤0.65), substage D2 (0.65 < R≤0.9), substage D, (R≈1) , substage D4 (R ≈1, the old and new carapaces were separated completely) based on the ratio that was the distance between new and old cuticles to old cuticle thickness of the end of dactyl segment in the swimming leg combining with the growth of the new carapace after dissection; opening of the ecdysial sutures in the ventral surface of thoracic and the dorsal of cheliped merus was the omen that was the beginning of ecdysis. The results showed that the technique of molt cycle staging in this paper was a simple, fast, nondestructive and reliable method for the swimming crab.关键词
三疣梭子蟹/蜕皮周期/蜕皮分期Key words
Portunus trituberculatus/ molt cycle/ molt staging分类
生物科学引用本文复制引用
沈洁,朱冬发,胡则辉,亓一舟,汪春建..三疣梭子蟹蜕皮周期的分期[J].水产学报,2011,35(10):1481-1487,7.基金项目
国家自然科学基金项目(40976098) （40976098）
浙江省科技计划(2008C22048) （2008C22048）
