HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
Peer-reviewed Journal Articles, etc >

Acoustic discrimination between juvenile walleye pollock and pointhead flounder

This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Files in This Item:
manuscript received 2020-04-17.pdf4.78 MBPDFView/Open
Please use this identifier to cite or link to this item:

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
Type: article (author version)
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)

Submitter: 向井 徹

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University