Supplementary material 2 (Video). Changes in sailfish breathing from gill pump ventilation to ram ventilation.(122.0MB, 00:00:32)撮影日：2022/10/17 撮影場所：Fukushima Marine Science Museum | ||
 | 種類 Istiophorus platypterus キーワード | |
Toshiaki Mori 2025/05/28登録 |
Supplementary material 2 (Video). Changes in sailfish breathing from gill pump ventilation to ram ventilation.(122.0MB, 00:00:32)撮影日：2022/10/17 撮影場所：Fukushima Marine Science Museum | ||
| 種類 Istiophorus platypterus キーワード | |
Toshiaki Mori 2025/05/28登録 |
動物界 >脊索動物門 >条鰭綱 >バショウカジキ目 >バショウカジキ科 >バショウカジキ属 >
ヒシコバン2個体がバショウカジキのエラから出て体表に沿って遊泳する．バショウカジキがエラを大きく開くとヒシコバンがエラに戻る（6秒後）．バショウカジキはエラ蓋を大きく開閉させて鰓ポンプ換水による呼吸を行う（6～16秒後）．鰓ポンプ換水のまま尾鰭を動かし遊泳速度を上げ（16～21秒後），速度が上昇するとラム換水に切り替える（21～31秒後）．
Below is the abstract from the article containing this video:
The symbiotic relationship between remoras and their hosts is difficult to comprehensively evaluate, as hosts may experience both benefits and disadvantages from their interaction with remoras. This study observed behaviors of sailfish (Istiophorus platypterus) and marlin suckers (Remora osteochir) in an aquarium by filming them. The marlin suckers displayed cleaning behavior, inserting their heads into small depressions along the base of the sailfish's fins and pecking at the host's injured snout. In response, the sailfish reduced its swimming speed and opened its operculum, allowing the marlin sucker to exit the gill cavity. These behaviors were consistent with the typical "cleaning–request" behavior observed in host species interacting with cleaner fish. Our observations strongly suggest a symbiotic relationship between the two species. Digital video images related to the article are available at http://www.momo-p.com/showdetail-e.php?movieid=momo250502ip07a, http://www. momo-p.com/showdetail-e.php?movieid=momo250502ip09a, and http://www.momo-p.com/showdetail-e.php?movieid= momo250502ip05a.
Toshiaki Mori, Kenichi Fujii, Kaori Fujii, Akira Komoda, and Takuzo Abe (2025) Symbiotic cleaning relationship between a sailfish (Istiophorus platypterus) and remoras (Remora osteochir). J. Ethol. 10.1007/s10164-025-00852-w
(データ番号：momo250502ip05a)
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