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学科主题: Ecology; Marine & Freshwater Biology
题名: Ecomorphological dimorphism of juvenile Trachurus japonicus in Wakasa Bay, Japan
作者: Kishida, Munenori1; Kanaji, Yu2; Xie, Songguang3; Watanabe, Yoshiro4; Kawamura, Tomohiko4; Masuda, Reiji5; Yamashita, Yoh5
通讯作者: Kishida, M, Minist Environm, Nat Conservat Bur, Biodivers Policy Div, Chiyoda Ku, 1-2-2 Kasumigaseki, Tokyo 1008975, Japan ; m-kissy@hkg.odn.ne.jp
关键词: Cohort-specific morphology ; Developmental environment ; Ecomorphology ; Juvenile dimorphism ; Swimming performance ; Trachurus japonicus
刊名: ENVIRONMENTAL BIOLOGY OF FISHES
发表日期: 2011-03-01
DOI: 10.1007/s10641-010-9743-5
卷: 90, 期:3, 页:301-315
收录类别: SCI
文章类型: Article
部门归属: [Kishida, Munenori] Minist Environm, Nat Conservat Bur, Biodivers Policy Div, Chiyoda Ku, Tokyo 1008975, Japan; [Kanaji, Yu] Fisheries Res Agcy, Natl Res Inst Far Seas Fisheries, Kanazawa Ku, Kanagawa 2368648, Japan; [Xie, Songguang] Chinese Acad Sci, Inst Hydrobiol, Key Lab Biodivers & Conservat Aquat Organisms, Wuhan 430072, Hubei, Peoples R China; [Watanabe, Yoshiro; Kawamura, Tomohiko] Univ Tokyo, Atmosphere & Ocean Res Inst, Chiba 2778568, Japan; [Masuda, Reiji; Yamashita, Yoh] Kyoto Univ, Field Sci Educ & Res Ctr, Maizuru Fisheries Res Stn, Kyoto 6250086, Japan
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: Ministry of Agriculture, Forestry and Fisheries
类目[WOS]: Ecology ; Marine & Freshwater Biology
研究领域[WOS]: Environmental Sciences & Ecology ; Marine & Freshwater Biology
摘要: Morphometric analyses of marine pelagic fishes have generally been conducted for stock identification rather than for ecomorphological understanding. Many papers on stock identification of Trachurus japonicus reported polymorphisms in the Japanese Islands waters. However, none of them has found polymorphism in fish less than 100 mm standard length (SL), despite the environmental differences experienced by juvenile cohorts. The objective of this study was to detect ecomorphological polymorphism of juvenile T. japonicus (< 100 mm SL) in Wakasa Bay, Japan, where multiple juvenile cohorts appear. From analyses of size frequency distributions and otolith microstructure, five cohorts were recognized in the bay from September 2003 to August 2004. We then compared 17 morphometric characters on body, fin, and otolith morphology, and found cohort-specific and roughly dimorphic pattern (a streamlined morph and a compressed morph). The dimorphism was markedly observed in 50-70 mm SL, and was regarded as specific to the juvenile stage by comparison with the senior dimorphisms (>= 100 mm SL). Referring to the literatures on functional morphology, the streamlined morph and the compressed morph were considered to be suitable to body and caudal fin (BCF) periodic propulsion and BCF transient propulsion, respectively. The juvenile dimorphism was interpreted as adaptive in its developmental environments (i.e., ecomorphological dimorphism) by relating the functional differences to the inferred ecological differences: the streamlined morph is adaptive to feed on larval Engraulis japonicus in coastal waters, whereas the compressed morph is adaptive to associate with jellyfishes in offshore waters.
英文摘要: Morphometric analyses of marine pelagic fishes have generally been conducted for stock identification rather than for ecomorphological understanding. Many papers on stock identification of Trachurus japonicus reported polymorphisms in the Japanese Islands waters. However, none of them has found polymorphism in fish less than 100 mm standard length (SL), despite the environmental differences experienced by juvenile cohorts. The objective of this study was to detect ecomorphological polymorphism of juvenile T. japonicus (< 100 mm SL) in Wakasa Bay, Japan, where multiple juvenile cohorts appear. From analyses of size frequency distributions and otolith microstructure, five cohorts were recognized in the bay from September 2003 to August 2004. We then compared 17 morphometric characters on body, fin, and otolith morphology, and found cohort-specific and roughly dimorphic pattern (a streamlined morph and a compressed morph). The dimorphism was markedly observed in 50-70 mm SL, and was regarded as specific to the juvenile stage by comparison with the senior dimorphisms (>= 100 mm SL). Referring to the literatures on functional morphology, the streamlined morph and the compressed morph were considered to be suitable to body and caudal fin (BCF) periodic propulsion and BCF transient propulsion, respectively. The juvenile dimorphism was interpreted as adaptive in its developmental environments (i.e., ecomorphological dimorphism) by relating the functional differences to the inferred ecological differences: the streamlined morph is adaptive to feed on larval Engraulis japonicus in coastal waters, whereas the compressed morph is adaptive to associate with jellyfishes in offshore waters.
关键词[WOS]: EAST CHINA SEA ; JACK MACKEREL ; STOCK IDENTIFICATION ; ONTOGENIC CHANGES ; BLUEGILL SUNFISH ; LARVAL TRANSPORT ; FISHES ; PATTERNS ; DIFFERENTIATION ; PERFORMANCE
语种: 英语
WOS记录号: WOS:000288542900009
ISSN号: 0378-1909
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/15608
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Minist Environm, Nat Conservat Bur, Biodivers Policy Div, Chiyoda Ku, Tokyo 1008975, Japan
2.Fisheries Res Agcy, Natl Res Inst Far Seas Fisheries, Kanazawa Ku, Kanagawa 2368648, Japan
3.Chinese Acad Sci, Inst Hydrobiol, Key Lab Biodivers & Conservat Aquat Organisms, Wuhan 430072, Hubei, Peoples R China
4.Univ Tokyo, Atmosphere & Ocean Res Inst, Chiba 2778568, Japan
5.Kyoto Univ, Field Sci Educ & Res Ctr, Maizuru Fisheries Res Stn, Kyoto 6250086, Japan

Recommended Citation:
Kishida, Munenori; Kanaji, Yu; Xie, Songguang; Watanabe, Yoshiro; Kawamura, Tomohiko; Masuda, Reiji; Yamashita, Yoh.Ecomorphological dimorphism of juvenile Trachurus japonicus in Wakasa Bay, Japan,ENVIRONMENTAL BIOLOGY OF FISHES,2011,90(3):301-315
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