Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea
文献类型: 外文期刊
作者: Xuan, Fujun 1 ; Guan, Weibing 2 ; Bao, Chengman 2 ; Tang, Fenghua 3 ; Tang, Boping 1 ; Zhou, Chunlin 1 ;
作者机构: 1.Yancheng Teachers Univ, Jiangsu Prov Key Lab Coastal Wetland Bioresource, Yancheng 224051, Jiangsu, Peoples R China
2.Shanghai Fisheries Univ, Key Lab Shanghai Educ Commiss Ocean Fisheries Res, Shanghai 200090, Peoples R China
3.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Key Lab East China Sea & Ocean Fishery Resources, Minist Agr, Shanghai 200090, Peoples R China
关键词: Portunus trituberculatus;Sperm limitation;Non-selective fishing;East China Sea
期刊名称:AQUATIC BIOLOGY ( 影响因子:1.8; 五年影响因子:1.945 )
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收录情况: SCI
摘要: Potential sperm limitation of the swimming crab Portunus trituberculatus was examined during the reproductive season from September 2006 to April 2007 in the East China Sea. We documented developmental variations between the spermatheca and ovary anddistinguished these into 5 stages. We counted the number of stored sperm in paired spermathecae and found that more than 50% of sperm initially received during mating disappeared as the sperm plug degenerated; around 1.70 x 108 were used for final fertilization, and there was significant correlation between the final number of stored sperm and female carapace width. Lastly, using knowledge of the reproductive characteristics of P. trituberculatus, we calculated potential spermiegg ratios of 221:1 or 153
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