The study of parasitical relationships between Rhopalione sinensis (Isopoda: Bopyridae) and their host Arcotheres sinensis in Changhua Wanggong and Hsinchu Xiangshan

• Main Author: 黃籥涵
• Other Authors: 楊樹森
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/35528091822696838760

碩士 === 國立新竹教育大學 === 應用科學系碩士班 === 100 === Parasitical relationships between pea crab Arcotheres sinensis (Shen,1932) and Rhopalione sinensis Markham, 1986 were investigated from January 2010 to January 2011 at Changhua Wanggong and Hsinchu Xianshan inTaiwan. The Von Bertalanffy growth function of two different populations of A.sinensis and R.sinensis were estimated based on length frequency distribution. Total of 4136 individuals of A. sinensis were checked, all of them are female. In annually, 37.5% of A. sinensis had R. sinensis parasites, and which none of them was brooding. The other crabs free of parasite, 48.5% of them were ovigerous individuals. There are no significant differences in the parasite prevalence and the prevalence of ovigerous individuals between two locations. The carapace width of crab parasite by R. sinensis ranges from 2.93 mm to 12.34mm; major ranged was 4- 10 mm. The carapace width of individuals free of parasites ranged from 1.92 mm to 12.69 mm. There were no significant differences in the carapace width between two locations, but the carapace width of individuals free of parasites significantly larger than the individuals with R. sinensis parasite at both locations. The prevalence of female in the populations with R. sinensis was 70.5% at two locations. The most prevalence combination of parasite was one male and one female on one pea crabs. The body length of R. sinensis was not significantly correlated with carapace width of host crab (Wanggong: female:R2=0.29, male: R2=0.10;Xiangshan: female: R2=0.20, male: R2=0.33). The mean fecundity of R. sinensis was 3955 (N= 15, SD= 1784) and individual fecundity was not significantly correlated with their body length (R2=0.5081). The VBGF estimated by FiSAT II for host and their parasites at two different locations. Wanggong A. sinensis is L_t=12.33[〖1-e〗^(-1.76(t)+1.76/(2π×sin⁡2π (t-0.5) ))] female of R. sinensis is L_t=8.91[〖1-e〗^(-1.51(t)+1.51/(2π×sin⁡2π (t-0.5) ))] male of R. sinensis is L_t=6.23[〖1-e〗^(-1.5(t)+1.5/(2π×sin⁡2π (t-0.5) ))] Xiangshan A. sinensis is L_t=12.06[〖1-e〗^(-1.76(t)+1.76/(2π×sin⁡2π (t-0.5) ))] female of R. sinensis is L_t=8.27[〖1-e〗^(-2.51(t)+2.51/(2π×sin⁡2π (t-0.5) ))] male of R. sinensis is L_t=5.5[〖1-e〗^(-2.01(t)+2.01/(2π×sin⁡2π (t-0.5) ))] According to the growth performance indices estimated by VBGF, both A. sinensis and their parasite R. sinensis at Xiangshan had better performance than at Wanggong in 2010.