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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第67巻 第2号 >

Preliminary investigation of the relationships between environmental conditions and landings of North Pacific giant octopus(Enteroctopus dofleini) at Minamikayabe, Hokkaido

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Please use this identifier to cite or link to this item:https://doi.org/10.14943/bull.fish.67.2.17

Title: Preliminary investigation of the relationships between environmental conditions and landings of North Pacific giant octopus(Enteroctopus dofleini) at Minamikayabe, Hokkaido
Authors: Taguchi, Akira Browse this author
Sawamura, Masayuki Browse this author
Bower, John R. Browse this author →KAKEN DB
Keywords: Enteroctopus dofleini
North Pacific giant octopus
Environmental factors
Catch abundance
Issue Date: 10-Aug-2017
Journal Title: 北海道大学水産科学研究彙報
Volume: 67
Issue: 2
Start Page: 17
End Page: 24
Abstract: Relationships between environmental factors and fluctuations in landing of North Pacific giant octopus(Enteroctopus dofleini Wulker, 1910) at Minamikayabe town, Hakodate city, Japan, during 1985-2016 were analyzed using regression analysis. Annual landings ranged between 165 and 403 tons, with an average of 273 tons. The relationship between landings and temperature was significant in 9 of the 24 months examined; 7 of the 9 occurred in catches 3-4 years after the temperature was measured. Rainfall showed no significant relationship with catch amounts. The results of the regression analyses suggest that landings of E. dofleini were related to ocean temperature, especially to temperatures 3-4 years before the landings occurred, presumably during the early part of the life cycle of the landed octopuses.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/67025
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第67巻 第2号

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