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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kodama, Keita Oyama, Masaaki Lee, Jeong Hoon Akaba, Yoshiaki Tajima, Yoshihiro Shimizu, Takamichi Shiraishi, Hiroaki Horiguchi, Toshihiro |
| Copyright Year | 2009 |
| Abstract | To explore which lifestages affect the stock size of young-of-the-year mantis shrimp Oratosquilla oratoria in Tokyo Bay, Japan, we investigated interannual variations in the quantitative relationships among egg production, larval density, and juvenile density. We collected adult females, larvae, and juveniles during monthly field surveys from 2004 to 2007. The interannual trend for the juvenile density index differed from those for egg production and larval density; although indices of both egg production and larval density were high in 2004 and 2007, the juvenile density index was high only in 2007, suggesting high mortality during the pelagic larval stage or the early phase of the postsettlement juvenile stage in 2004. We found that larval settlement started at the end of August and peaked in October, although larvae from the early spawning season (May–June) should have settled in August or earlier. Juveniles were found throughout the bay except in areas where bottom hypoxia occurred, suggesting that hypoxia restricts the spatial distribution of juveniles. Our results suggest that mortality during the early life history fluctuates among years, probably because of changes in environmental conditions in the bay, resulting in interannual variation in the stock size of young-of-the-year juvenile O. oratoria. |
| Starting Page | 875 |
| Ending Page | 886 |
| Page Count | 12 |
| File Format | |
| ISSN | 09199268 |
| Journal | Fisheries Science |
| Volume Number | 75 |
| Issue Number | 4 |
| e-ISSN | 14442906 |
| Language | English |
| Publisher | Springer Japan |
| Publisher Date | 2009-05-12 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Early life history Hypoxia Mortality Oratosquilla oratoria Pelagic larvae Population dynamics Recruitment Tokyo Bay Food Science Freshwater & Marine Ecology Fish & Wildlife Biology & Management |
| Content Type | Text |
| Resource Type | Article |
| Subject | Aquatic Science |
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