Study On Oosperm Hatching And Adhesion Effect Among Different Materials Of Sepia Esculenta

Sepia esculenta belongs to the family Sepiidae, the genus Sepia. This sepecies is widely distributed in Far East. It is a commonly occurring cuttlefish found in the north coast of China, and comprises an important coastal fisheries resource.There are few papers about Sepia esculenta in the last twenty years. The cuttlefish, Sepia esculenta, examined in this paper belongs to the population inhabiting Lan Shan Tou,Ri Zhao, on the coast of Shan Dong Province, China. The samples collected were researched by using traditionally morphological method. The development of larva and adhesion effect of Chengliu (Tamarix chinensis), Huanghuahao (Artemisia annud), Difucao (Kochia scoparia), Zhumiao (bamboo branch) was researched.First, the morphological characters of Sepia esculenta were observed and the morphological characters of the jaws in Sepia esculenta were described in the first time.Second, the oosperm hatching of Sepia esculenta and larval development were researched in the lab.Third, adhesion effect of Chengliu (Tamarix chinensis), Huanghuahao (Artemisia annud), Difucao (Kochia scoparia), Zhumiao (bamboo branch) was researched.The oosperm hatching of Sepia esculenta of Lanshan coastal waters of Rizhao under the laboratory condition was done. The hatching rate of Sepia esculenta oosperm was about 83.8% and the juveniles were similar with adult Sepia esculenta. The average value of mantle length and body weight was 5.53 mm and 70 mg respectively. The results on adhesion effect of Chengliu (Tamarix chinensis), Huanghuahao (Artemisia annua), Difucao (Kochia scoparia), Zhumiao (bamboobranch) showed that the average adhesion rates was 74.0%, 71.2%, 31.9%, 20.2% respectively, and the average value of proportion of egg number above 500 was 79.7%, 72.8%, 10.5%, 0 respectively. Chengliu and Huanghuahao may be selected to be the adhesive materials of Sepia esculenta oosperm in the future enhancement.This paper may be contribute to the enhancement of Sepia esculenta and give useful data for cultivation of Sepia esculenta in the future.