Abstract
Bone and fins development in Seriola rivoliana were studied from cleared and stained specimens from 3 to 33 days after hatching. The vertebral column began to mineralize in the neural arches at 4.40 ± 0.14 mm Standard Length (SL), continued with the haemal arches and centrums following a cranial-caudal direction. Mineralization of the caudal fin structures started with the caudal rays by 5.12 ± 0.11 mm SL, at the same time that the notochord flexion occurs. The first dorsal and anal fin structures were the hard spines (S), and lepidotrichium (R) by 8.01 ± 0.26 mm SL. The metamorphosis was completed by 11.82 ± 0.4 mm SL. Finally, the fin supports (pterygiophores) and the caudal fins were completely mineralized by 16.1 ± 0.89 mm SL. In addition, the meristic data of 23 structures were provided. Results from the present study might be used as a practical guide for future studies on this field with S. rivoliana or in related species.
Highlights
Longfin yellowtail, Seriola rivoliana (Valenciennes, 1833) is one of the species proposed for marine aquaculture diversification, mostly due to its fast growth rate [1,2] and worldwide distribution
S. rivoliana vertebral column mineralization was initiated with the neural arches (Na1-Na3) by 4.40 ± 0.14 mm Standard Length (SL) (Figure 1A), followed by the haemal arches (Ha1-Ha3) and the cephalic vertebrae (Ce1-4) by 4.74 ± 0.27 mm SL (Figure 1B)
Urostyle was formed by two independent structures (Ur1-Ur2) that fused by 10.23 ± 0.26 mm SL (Figure 1F)
Summary
Seriola rivoliana (Valenciennes, 1833) is one of the species proposed for marine aquaculture diversification, mostly due to its fast growth rate [1,2] and worldwide distribution. This species belongs to Carangidae family, along with other popular species like Seriola dumerili (greater amberjack), Seriola lalandi (yellowtail king fish) and Seriola quinqueradiata (Japanese yellowtail). Numerous studies have described the osteological development of other marine finfish species, such as Sparus aurata [30,31], Pagrus pagrus [32,33], Solea senegalensis [34,35], Dentex dentex [36], Argyrosomus regius [37], Epinephelus septemfasciatus [38] or Dicentrarchus labrax [39]
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