Pronounced genetic structure in a highly mobile coral reef fish, Caesio cuning, in the Coral Triangle

Marine Ecology Progress Series

November Romena¹  Eric D. Crandall¹  Kent E. Carpenter¹  Shinta Pardede¹  Paul H. Barber¹  Ambariyanto¹  Ma. Carmen A. Ablan-Lagman¹  Amanda S. Ackiss¹ 

关键词: Connectivity;    Gene flow;    Isolation by distance;    Coral reef fish;    Artisanal fisheries ;    Coral Triangle;   

DOI  :  10.3354/meps10199

学科分类：海洋学与技术

来源: Inter-Research

【 摘 要 】

ABSTRACT: The redbelly yellowtail fusilier Caesio cuning has a tropical Indo-West Pacific range that straddles the Coral Triangle, a region of dynamic geological history and the highest marine biodiversity on the planet. Previous genetic studies in the Coral Triangle indicate the presence of multiple limits to connectivity. However, these studies have focused almost exclusively on benthic, reef-dwelling species. Schooling, reef-associated fusiliers (Perciformes: Caesionidae) account for a sizable portion of the annual reef catch in the Coral Triangle, yet to date, there have been no in-depth studies on the population structure of fusiliers or other mid-water, reef-associated planktivores across this region. We evaluated the genetic population structure of C. cuning using a 382 bp segment of the mitochondrial control region amplified from over 620 fish sampled from 33 localities across the Philippines and Indonesia. Phylogeographic analysis showed that individuals sampled from sites in western Sumatra belong to a distinct Indian Ocean lineage, resulting in pronounced regional structure between western Sumatra and the rest of the Coral Triangle (Φ_CT = 0.4796, p < 0.004). We found additional significant population structure between central Southeast Asia and eastern Indonesia (Φ_CT = 0.0450, p < 0.001). These data in conjunction with spatial analyses indicate that there are 2 major lineages of C. cuning and at least 3 distinct management units across the region. The location of genetic breaks as well as the distribution of divergent haplotypes across our sampling range suggests that current oceanographic patterns could be contributing to observed patterns of structure.

【 授权许可】

Unknown