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Effects of habitat structure and salinity on growth and survival of juvenile mangrove red snapper Lutjanus argentimaculatus (Forsskal, 1775) |
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| รหัสดีโอไอ | |
| Creator | 1. Vo Van Chi 2. James Dominic True |
| Title | Effects of habitat structure and salinity on growth and survival of juvenile mangrove red snapper Lutjanus argentimaculatus (Forsskal, 1775) |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2561 |
| Journal Title | Songklanakarin Journal of Science and Technology |
| Journal Vol. | 40 |
| Journal No. | 6 |
| Page no. | 1240-1247 |
| Keyword | Lutjanus argentimaculatus, reef fish, habitat structure, salinity, stock viability |
| URL Website | http://rdo.psu.ac.th/sjstweb/index.php |
| ISSN | 0125-3395 |
| Abstract | Mangrove Red Snapper (Lutjanus argentimaculatus) is a large, palatable fish that has become increasingly valuable for aquaculture in South East Asia. Unfortunately, the bulk of current mariculture of L. argentimaculatus depends almost entirely on fingerlings collected from the wild, since hatchery-raised fry are regarded as inferior by fishermen. Wild Mangrove Red Snapper spawn on offshore reefs, but their larvae occupy coastal lagoons and estuaries. In this study, we examined some of the factors (habitat structure and salinity) associated with the natural recruitment habitat of L. argentimaculatus to determine whether they might play a role in the perceived superiority of wild-caught fry. We found statistically significant relationships between survival and salinity, and between somatic growth and habitat structure, but no interaction between the factors. Juvenile L. argentimaculatus survived best at moderate (17ppt) salinities, with fresher water (10ppt) providing better outcomes than more saline (25ppt) conditions. We found also that juveniles grew best when provided with hard, complex structures (rock piles and mangrove roots), rather than in tanks without such structures. Here, we have demonstrated two simple environmental factors that improve survival and growth of juvenile L. argentimaculatus and may provide a substantial boost to the performance of hatcheryreared fish. |
