| Title |
Genetic diversities of commercially harvested jellyfish, Rhopilema hispidum and Lobonemoides robustus in Southeast Asia |
|
Authors |
Akane Iida, Kenji Nohara, Fatimah Md. Yusoff, Khwanruan Srinui, Tran Manh Ha, Susumu Ohtsuka, Ephrime B. Metillo, Honorio B. Pagliawan & Jun Nishikawa |
|
Publication date |
2021 |
|
Journal |
Plankton and Benthos Research |
| Volume |
16 |
| Issue |
4 |
| Pages |
1-10 |
| Publisher |
Plankton Society of Japan |
| Abstract |
The rhizostome jellyfishes, Rhopilema hispidum and Lobonemoides robustus, are some of the most abundant
and commercially important species in Southeast Asia. However, information on genetic diversity and continuities
among local populations remains totally unknown. We explored the genetic structure and population continuities of R.
hispidum and L. robustus using genetic markers (COI & ITS1 regions) at 11 locations in four countries in Southeast
Asia where fisheries were conducted. Rhopilema populations showed genetic distances (脦娄ST) among locations correlated
positively with geographic distances, suggesting that they are in the isolation-by-distance (IBD). In Lobonemoides,
molecular analysis revealed three distinct clades corresponding to sampling locations. Genetic distances among
locations in L. robustus suggested that all populations maintain significant isolation. Our study reveals that these two
blooming species have different phylogeographic patterns and differ in genetic diversity and continuities. Eustatic sea
level changes during the Pleistocene and present ocean current systems, as well as differences in biological characteristics
of these two species may explain these phylogeographic differences. Our results also suggest that jellyfish fisheries
need to be carefully managed to avoid extinction of local populations and maintain the genetic diversity of these species,
especially for L. robustus, which exhibits considerable genetic diversity in each location. |
| Index terms / Keywords |
Jellyfish bloom, Jellyfish fisheries, Phylogeography, Sundaland, Southeast Asia |
| URL |
|
Mindanao State
University - Iligan Institute of Technology