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A larva of Coryphaenoides pectoralis (Gadiformes: Macrouridae) collected by deep-sea submersible from off Hokkaido, Japan

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Abstract

A late-stage larva of Coryphaenoides pectoralis was first observed in situ and subsequently collected by the deep-sea submersible “Shinkai 2000” from mesopelagic waters at a depth of 530 m off Hokkaido, Japan. The larva (14.5 mm in head length, 149+ mm in total length) has fan-like pectoral fins, elongate first dorsal fin, pelvic fin and tail, 10 first dorsal rays (including 2 pseudospines), and 7 pelvic fin rays, 6 branchiostegal rays, no light organ, anus just anterior to anal fin origin, 2 retia and gas glands, 14 abdominal vertebrae, and previously reported larval pigmentation. Counts of second dorsal and anal fin rays, and caudal vertebrae, are reported for the first time.

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Acknowledgments

We thank the crew and scientists on board “R/V Natsushima” (Cruise No. NT 00-09) and “Shinkai 2000” (Dive No. 1218), K. Mitsufuji, and Y. Chida (Nippon Marine Enterprises Ltd.) for assistance to HM in collecting the present larva, and G. Shinohara (NSMT) and M. Miya (CBM) for lending us the specimens, and crew and scientists on board R/V Hakuho-maru (KH91-6), R/V Tansei-maru (KT82-13, KT08-27), and R/V Wakataka-maru (October 1995) for collecting comparative materials. We also thank G. Yearsley (Hobart, Australia) for editing the English text.

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Correspondence to Hiromitsu Endo.

Electronic supplementary material

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ESM Movie S1 Swimming of Coryphaenoides pectoralis, NSMT-PL 117, 14.5 mm HL, 149+ mm TL, in mesopelagic water (Shinkai 2000: Dive No. 1218) and an aquarium on board (R/V Natsushima: Cruise No. NT 00-09). Recorded by H. Miyake (M4V 26098 kb)

ESM Movie S1 Swimming of Coryphaenoides pectoralis, NSMT-PL 117, 14.5 mm HL, 149+ mm TL, in mesopelagic water (Shinkai 2000: Dive No. 1218) and an aquarium on board (R/V Natsushima: Cruise No. NT 00-09). Recorded by H. Miyake (M4V 26098 kb)

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Endo, H., Nakayama, N., Suetsugu, K. et al. A larva of Coryphaenoides pectoralis (Gadiformes: Macrouridae) collected by deep-sea submersible from off Hokkaido, Japan. Ichthyol Res 57, 272–277 (2010). https://doi.org/10.1007/s10228-010-0164-4

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Keywords

  • Macrourid larva
  • Coryphaenoides pectoralis
  • Mesopelagic
  • Shinkai 2000
  • Hokkaido