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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
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Acoustic discrimination between juvenile walleye pollock and pointhead flounder
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| Title: | Acoustic discrimination between juvenile walleye pollock and pointhead flounder |
| Authors: | Yan, Naizheng Browse this author | | Mukai, Tohru Browse this author →KAKEN DB | | Yamamoto, Jun Browse this author →KAKEN DB | | Hasegawa, Kohei Browse this author →KAKEN DB |
| Keywords: | Walleye pollock | | Pointhead flounder | | Predator-prey relationship | | Frequency characteristic | | Bladderless fish |
| Issue Date: | Apr-2020 |
| Publisher: | Elsevier |
| Journal Title: | Fisheries research |
| Volume: | 224 |
| Start Page: | 105434 |
| Publisher DOI: | 10.1016/j.fishres.2019.105434 |
| Abstract: | When using acoustic methods to investigate fish biomass, it is important to distinguish the target species from other organisms. Previous limitations to acoustic information in surveys meant it was not possible to discriminate juvenile walleye pollock from their predator, pointhead flounder, in Funka Bay, Japan, possibly leading to overestimates in population size. Thus, here, an acoustic method was developed to distinguish the two species based on relative frequency response. This method was used to survey juvenile walleye pollock to evaluate capture potential around Funka Bay, Japan, where pointhead flounder is reportedly its most abundant predator. Volume backscattering strength of pointhead flounder was highest at 200 kHz, while that of juvenile walleye pollock was highest at 38 kHz. Therefore, the relative frequency response at 38 kHz and 200 kHz was successfully used to distinguish between the two species. This method could be more extensively applied to other species in other aquatic environments globally. |
| Rights: | © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/84950 |
| Appears in Collections: | 水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 向井 徹
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