Abstract
Skull, pectoral and pelvic fin bone structures in longfin yellowtail Seriola rivoliana were studied from 3.43±0.15 to 16.20±0.73mm standard length (SL) specimens. The S. rivoliana skull started to mineralize with the appearance of the parasphenoid and maxillary by 3.43±0.15mm SL at the neurocranium and jaw regions, respectively. The first pectoral structure to mineralize was the cleithrum at 3.75±0.14mm SL shortly followed by the supracleithrum and posttemporal. The pelvic fin started by 6.16±0.32mm SL with the spine and continued with the soft rays and basipterygium. The present study determined the onset of the skull, pectoral and pelvic fin mineralization. These results might be used as a reference for future studies in S. rivoliana or related species.
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