Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea
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 and distinguished these into 5 stages. We counted the...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Inter-Research
2014-04-01
|
| Series: | Aquatic Biology |
| Online Access: | https://www.int-res.com/abstracts/ab/v20/n2/p145-153/ |
| _version_ | 1818834223724756992 |
|---|---|
| author | F Xuan W Guan C Bao F Tang B Tang C Zhou |
| author_facet | F Xuan W Guan C Bao F Tang B Tang C Zhou |
| author_sort | F Xuan |
| collection | DOAJ |
| description | 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 and distinguished 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 × 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 sperm:egg ratios of 221:1 or 153:1 for the first brood, and 55:1 or 38:1 for lifetime broods—either from the perspective of a fishery resource assessment or from the perspective of seed production. From comparison to sperm:egg ratios of Callinectes sapidus (for lifetime broods this ranges from 10:1 to 42:1), we can infer that female P. trituberculatus in the East China Sea may be at low risk of sperm limitation under current fishing practices. This may be the result of greater fishing mortality of females, causing an increase in the operational sex ratio. The present study improves our knowledge of sperm limitation in brachyurans as fishing management in China is non-selective, which differs from other exploited decapod crustacean species around the world. |
| first_indexed | 2024-12-19T02:31:24Z |
| format | Article |
| id | doaj.art-1e5473eaeb204e4a8443593c740e225f |
| institution | Directory Open Access Journal |
| issn | 1864-7782 1864-7790 |
| language | English |
| last_indexed | 2024-12-19T02:31:24Z |
| publishDate | 2014-04-01 |
| publisher | Inter-Research |
| record_format | Article |
| series | Aquatic Biology |
| spelling | doaj.art-1e5473eaeb204e4a8443593c740e225f2022-12-21T20:39:36ZengInter-ResearchAquatic Biology1864-77821864-77902014-04-0120214515310.3354/ab00555Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China SeaF Xuan0W Guan1C Bao2F Tang3B Tang4C Zhou5Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng, Jiangsu 224051, PR ChinaKey Laboratory of Shanghai Education Commission for Oceanic Fisheries Resources Exploitation, Shanghai Fisheries University, Shanghai 200090, PR ChinaKey Laboratory of Shanghai Education Commission for Oceanic Fisheries Resources Exploitation, Shanghai Fisheries University, Shanghai 200090, PR ChinaKey Laboratory of East China Sea & Oceanic Fishery Resources Exploitation and Utilization, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR ChinaJiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng, Jiangsu 224051, PR ChinaJiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng, Jiangsu 224051, PR ChinaPotential 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 and distinguished 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 × 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 sperm:egg ratios of 221:1 or 153:1 for the first brood, and 55:1 or 38:1 for lifetime broods—either from the perspective of a fishery resource assessment or from the perspective of seed production. From comparison to sperm:egg ratios of Callinectes sapidus (for lifetime broods this ranges from 10:1 to 42:1), we can infer that female P. trituberculatus in the East China Sea may be at low risk of sperm limitation under current fishing practices. This may be the result of greater fishing mortality of females, causing an increase in the operational sex ratio. The present study improves our knowledge of sperm limitation in brachyurans as fishing management in China is non-selective, which differs from other exploited decapod crustacean species around the world.https://www.int-res.com/abstracts/ab/v20/n2/p145-153/ |
| spellingShingle | F Xuan W Guan C Bao F Tang B Tang C Zhou Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea Aquatic Biology |
| title | Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea |
| title_full | Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea |
| title_fullStr | Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea |
| title_full_unstemmed | Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea |
| title_short | Current fishing practices may induce low risk of sperm limitation in female swimming crab Portunus trituberculatus in the East China Sea |
| title_sort | current fishing practices may induce low risk of sperm limitation in female swimming crab portunus trituberculatus in the east china sea |
| url | https://www.int-res.com/abstracts/ab/v20/n2/p145-153/ |
| work_keys_str_mv | AT fxuan currentfishingpracticesmayinducelowriskofspermlimitationinfemaleswimmingcrabportunustrituberculatusintheeastchinasea AT wguan currentfishingpracticesmayinducelowriskofspermlimitationinfemaleswimmingcrabportunustrituberculatusintheeastchinasea AT cbao currentfishingpracticesmayinducelowriskofspermlimitationinfemaleswimmingcrabportunustrituberculatusintheeastchinasea AT ftang currentfishingpracticesmayinducelowriskofspermlimitationinfemaleswimmingcrabportunustrituberculatusintheeastchinasea AT btang currentfishingpracticesmayinducelowriskofspermlimitationinfemaleswimmingcrabportunustrituberculatusintheeastchinasea AT czhou currentfishingpracticesmayinducelowriskofspermlimitationinfemaleswimmingcrabportunustrituberculatusintheeastchinasea |