Abstract
Annual and seasonal changes in the abundance and the assemblage of planktonic copepods and appendicularians were clarified in Funka Bay. Zooplankton samples were obtained by vertical hauls with a NORPAC net (0.10-mm mesh aperture) from December to May over a 4-year period (2014–2017). Temporal fluctuations of mean abundance of copepods were small from December 2013 to May 2014 under the low water temperature condition (maximum 1.55 times difference between adjacent survey periods), while those were large in other 3 years (1.60–1.93 times). Maximum mean abundance of appendicularians in 2014 (6.0 × 104 ind./m2) was lower than those in 2015–2017 (8.6 × 104–1.4 × 105 ind./m2). Less saline (≤ 33.3) and cold Coastal Oyashio Water (COW) intruded in early February 2014, late February 2015, and late March 2016 and 2017. Phytoplankton blooms occurred in March of all 4 years. Copepods and appendicularians increased nearer periods of phytoplankton bloom than after COW intrusion. In the results of canonical correspondence analysis, the assemblage of copepods and appendicularians gradually changed from small-sized and warm-water species to large-sized and cold-water ones. Northwesterly wind speed had an effect equal to COW intrusion (82% of COW intrusion) to the change in taxonomic compositions of copepods and appendicularians.
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References
Ban S, Miyagawa Y, Okuda Y, Shiga N (1998) Succession of the calanoid copepod community in Funka Bay during spring phytoplankton bloom. Mem Fac Fish Hokkaido Univ 45:42–47
Deibel D (1998) Feeding and metabolism of Appendicularia. In: Bone Q (ed) The biology of pelagic tunicates. Oxford University Press, New York
Hashimoto Y, Maeda A, Ohno Y, Kano Y, Takatsu T (2011) Feeding habits of two flatfish-species larvae in Funka Bay, Japan—importance of Oikopleura as prey. Bull Plankton Soc Jpn 58:165–177 (in Japanese with English abstract)
Hayashi K (1963) About flathead flounder in Funka Bay. Hokusuishi Geppo 20:6–15 (in Japanese)
Hioki N, Kuma K, Morita Y, Miura D, Ooki A, Tanaka S, Onishi H, Takatsu T, Kobayashi N, Kamei Y (2015) Regeneration dynamics of iron and nutrients from bay sediment into bottom water of Funka Bay, Japan. J Oceanogr 71:703–714
Hirakawa K (1983) The study of seasonal distribution about copepods and life history of Calanus pacificus, Calanus plumchrus and Eucalanus bungii bungii in Funka Bay. Nippon Institute for Biological Science, Tokyo (in Japanese)
Hirst AG, Bunker AJ (2003) Growth of marine planktonic copepods: global rates and patterns in relation to chlorophyll a, temperature, and body weight. Limnol Oceanogr 48:1988–2010
Hirst AG, Lampitt RS (1998) Towards a global model of in situ weight–specific growth in marine planktonic copepods. Mar Biol 132:247–257
Isoda Y, Hasegawa N (1997) Heat budget of Funka Bay. Sora to Umi 72:93–101 (in Japanese with English abstract)
Kamba M (1977) Feeding habits and vertical distribution on walleye pollock, Theragra chalcogramma (Pallas), in early life stage in Uchiura Bay, Hokkaido. Res. Inst. N. Pac. Fish., Hokkaido Univ., Spec. Vol., pp 175–197
Kano Y, Takatsu T, Hashimoto Y, Inagaki Y, Nakatani T (2015) Annual variation in otolith increment widths of walleye pollock (Gadus chalcogrammus) larvae in Funka Bay, Hokkaido, Japan. Fish Oceanogr 24:325–334
Kobari T, Ikeda T (2001a) Life cycle of Neocalanus flemingeri (Crustacea: Copepoda) in the Oyashio region, western subarctic Pacific, with notes on its regional variations. Mar Ecol Prog Ser 209:243–255
Kobari T, Ikeda T (2001b) Ontogenetic vertical migration and life cycle of Neocalanus plumchrus (Crustacea: Copepoda) in the Oyashio region, with notes on regional variations in body sizes. J Plankton Res 23:287–302
Maeda T, Takahashi T, Ijichi M, Hirakawa H, Ueno M (1976) Ecological studies on the Alaska pollock in the adjacent waters of the Funka Bay, Hokkaido—II. Nippon Suisan Gakkaishi 42:1213–1222 (in Japanese with English abstract)
Mauchline J (1998) Advances in marine biology Vol. 33, The biology of calanoid copepods. Academic Press, San Diego
Miyamoto T, Takatsu T, Nakatani T, Maeda T, Takahashi T (1993) Distribution and food habits of eggs and larvae of Hippoglossoides dubius in Funka Bay and its offshore waters, Hokkaido. Bull Jpn Soc Fish Oceanogr 57:1–14 (in Japanese with English abstract)
Nakatani T (1988) Studies on the early life history of walleye pollock Theragra chalcogramma in Funka Bay and vicinity, Hokkaido. Mem Fac Fish Hokkaido Univ 35:1–46
Nakatani T, Maeda T (1983) Distribution of walleye pollock larvae and their food supply in Funka Bay and the adjacent waters, Hokkaido. Nippon Suisan Gakkaishi 49:183–187 (in Japanese with English abstract)
Nakatani T, Maeda T (1987) Distribution and movement of walleye pollock larvae Theragra chalcogramma in Funka Bay and the adjacent waters, Hokkaido. Nippon Suisan Gakkaishi 53:1585–1591 (in Japanese with English abstract)
Nakatani T, Sugimoto K, Takatsu T, Takahashi T (2003) Environmental factor in Funka Bay, Hokkaido, affecting the year class strength of walleye pollock, Theragra chalcogramma. Bull Jpn Soc Fish Oceanogr 67:23–28 (in Japanese with English abstract)
Ohtani K (1985) Funka Bay II. Physical. In: Coastal Oceanography Research Committee, The Oceanographical Society of Japan (ed) Coastal Oceanography of Japanese Island. Tokai University Press, Tokyo, pp 102–112 (in Japanese)
Ohtani K, Kido K (1980) Oceanographic structure in Funka Bay. Bull Fac Fish Hokkaido Univ 31:84–114 (in Japanese with English abstract)
Shiga N (1984) Ecological knowledge of appendicularian for the last ten years. In: Thirtieth anniversary issue of Japan Plankton Society, pp 81–86 (in Japanese)
Shiga N (1985) Seasonal and vertical distributions of Appendicularia in Volcano Bay, Hokkaido, Japan. Bull Mar Sci 37:425–439
Shimizu M, Isoda Y (1997) The transport process of walleye pollock eggs into Funka Bay in winter. Bull Jpn Soc Fish Oceanogr 61:134–143 (in Japanese with English abstract)
Shoden S, Ikeda T, Yamaguchi A (2005) Vertical distribution, population structure and lifecycle of Eucalanus bungii (Copepoda: Calanoida) in the Oyashio region, with notes on its regional variations. Mar Biol 146:497–511
Takatsu T, Suzuki Y, Shimizu A, Imura K, Hiraoka Y, Shiga N (2007) Feeding habitats of stone flounder Platichthys bicoloratus larvae in Mutsu Bay, Japan. Fish Sci 73:142–155
Tanaka M (1980) Feeding and survival of marine fish larvae I. Food organisms of wild larvae. Aquabiology 11:440–447 (in Japanese with English abstract)
ter Braak CJF (1986) Canonical correspondence analysis: a new eigenvector technique for multivariate direct gradient analysis. Ecology 67:1167–1179
Acknowledgements
Thanks to Dr. Toshikuni Nakatani and Captain Yoshihiko Kamei and crew of the T/S Ushio-maru, and staff of the Laboratory of Marine Bioresource Science of Hokkaido University for their cooperation in collecting samples. This study was supported by Hokusui Society Foundation, Sapporo, and JSPS KAKENHI Grant Numbers 25450269, 16K07834.
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Yamaoka, H., Takatsu, T., Suzuki, K. et al. Annual and seasonal changes in the assemblage of planktonic copepods and appendicularians in Funka Bay before and after intrusion of Coastal Oyashio Water. Fish Sci 85, 1077–1087 (2019). https://doi.org/10.1007/s12562-019-01345-9
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DOI: https://doi.org/10.1007/s12562-019-01345-9