Interspecific variations in age and size at settlement of 8 emperor fishes (Lethrinidae) at the southern Ryukyu Islands,Japan |
| |
| Authors: | Yohei Nakamura Takuro Shibuno Nobuaki Suzuki Jun Nakamori Kiyoaki Kanashiro Yoshiro Watanabe |
| |
| Institution: | (1) Ocean Research Institute, University of Tokyo, Nakano-ku, Tokyo 1648639, Japan;(2) Ishigaki Tropical Station, Seikai National Fisheries Research Institute, Ishigaki Okinawa, 9070451, Japan;(3) Okinawa Prefectural Sea Farming Center, Motobu Okinawa, 9050212, Japan;(4) Present address: Graduate School of Kuroshio Science, Kochi University, Nankoku Kochi, 7838502, Japan;(5) Present address: National Research Institute of Aquaculture, Minami-ise Mie, 5160193, Japan |
| |
| Abstract: | Molecular and otolith analyses were conducted for 173 settlement-stage larvae of emperor fishes (family Lethrinidae) collected
by light traps at Ishigaki Island, southern Japan, in July and August (summer season), to (1) present diagnostic DNA markers
for identification of lethrinid species and (2) compare the size and age at settlement of each species. PCR–RFLP and direct
nucleotide sequencing analyses identified 8 species. Size (standard length, SL) at settlement differed significantly between
species; Lethrinus ornatus (mean SL ± SD, 12.8 ± 1.5 mm), L. obsoletus (14.2 ± 0.8 mm) and L. harak (15.8 ± 1.6 mm) settled at a smaller size than L. atkinsoni (17.0 ± 1.3 mm), L. genivittatus (17.3 ± 1.0 mm), L. olivaceus (18.1 ± 0.6 mm), L. nebulosus (18.6 ± 4.2 mm), and L. sp.2 reported by Lo Galbo et al. (J Mol Evol 54:754–762, 2002) (21.7 ± 1.4 mm). Age at settlement tends to increase with
settlement size; L. obsoletus (mean age ± SD, 25.6 ± 1.2 days), L. atkinsoni (26.1 ± 2.1 days) and L. ornatus (26.3 ± 2.9 days) were younger at settlement than L. nebulosus (28.4 ± 2.1 days), L. harak (29.2 ± 1.7 days), L. olivaceus (29.5 ± 1.0 days), L. genivittatus (30.5 ± 1.7 days) and L. sp.2 (31.0 ± 2.0 days). Although our study showed interspecific variation in body size and age at settlement among 8 lethrinid
species, further seasonal replication is necessary to clarify the general patterns. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
