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- Title
Larval identification based on melanophore patterns in two Auxis species, bullet tuna Auxis rochei and frigate tuna Auxis thazard, from the northwest Pacific Ocean.
- Authors
Sato, Takuya; Tawa, Atsushi; Sakuma, Kay; Sakurai, Masaki
- Abstract
Larvae of Auxis rochei and Auxis thazard are commonly found in tropical to temperate waters around the world; however, their identification is difficult due to their similar morphological characteristics. In order to determine the morphological differences between larvae of these two species, we identified larvae of 192 A. rochei and 119 A. thazard using species-specific genetic markers and compared their melanophore patterns at each growth stage. The larvae of both species ranged from 3.5 to 6.9 mm in length and were identified with high accuracy based on the patterns of melanophore distribution at the snout tip and on the caudal peduncle. Using these morphological characteristics, we developed an identification key for the larvae of these two Auxis species based on their growth stage.
- Subjects
TUNA; FRIGATES; GENETIC markers; OCEAN; BULLETS
- Publication
Fisheries Science, 2020, Vol 86, Issue 4, p625
- ISSN
0919-9268
- Publication type
Article
- DOI
10.1007/s12562-020-01429-x