高知県手結地先に生育するカジメ(褐藻, コンブ目)の年齢と形態の関係  [in Japanese] Relationship between Age and Morphology of Ecklonia cava (Laminariales, Phaeophyta) Sporophytes Growing off Tei, Kochi Prefecture, Japan  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

南日本, 土佐湾手結地先のカジメ (褐藻, コンブ目) 個体群の年齢と形態の関係を1996年に季節的に調べた。生長輪の計測から少数の3歳個体を確認した。調査期間中の茎長と茎径の各年齢群での平均値は0歳群で3.4~12.6cmと4.6~7.5mm, 1歳群で5.9~13.7cmと7.7~10.2mm, 2歳群で7.2~18.4cmと10.3~13.4mmであった。中央葉長, 中央葉幅, 側葉数, 最長側葉長はそれぞれ0歳群で18.5~32.8cm, 4.6~6.2cm, 9~21枚, 10.6~23.8cm, 1歳群で22.0~39.1cm, 5.5~6.9cm, 14~27枚, 20.1~34.9cm, 2歳群で9.6~25.6cm, 5.8~8.1cm, 17~30枚, 32.5~40.3cmであった。中央葉長を除く全ての測定項目は概ね年齢に伴って増加したが, それらの値は年齢群問で重複しており, はっきりとは分離しなかった。

The relationship between age and morphology of <I>Ecklonia cava</I> Kjellman (Laminariales, Phaeophyta) sporophytes were studied seasonally in 1996 in a population off the Tei coast in Tosa Bay, southern Japan. Based on measurement of the growth rings, a small number of 3-year-old sporophytes were confirmed. The mean values of stipe length and diameter of each age group during the investigation period was follows; 7.2-18.4 cm and 4.6-7.5 mm in the 0-year-olds; 3.4-12.6 cm and 7.7-10.2 mm in the 1-year-olds; 5.9-13.7 cm and 10.3-13.4 mm in the 2-year-olds. Primary blade length, primary blade width, number of bladelets and longest bladelet length of each age group was as follows; 18.5-32.8 cm, 4.6-6.2cm, 9-21 pieces and 10.6-23.8 cm, respectively in the 0-year-olds; 22.0-39.1 cm, 5.5-6.9 cm, 14-27 pieces and 20.1-34.9 cm, respectively in the 1-year-olds; 9.6-25.6 cm, 5.8-8.1 cm, 17-30 pieces and 32.5-40.3 cm, respectively in the 2-year-olds. Thus, all biometric parameters except for primary blade length increased with age, but these values overlapped with each age group and they did not separate clearly.

Journal

  • Aquaculture Science

    Aquaculture Science 50(2), 163-169, 2002-06-20

    Japanese Society for Aquaculture Science

References:  21

Cited by:  5

Codes

  • NII Article ID (NAID)
    10008750574
  • NII NACSIS-CAT ID (NCID)
    AN00124667
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03714217
  • NDL Article ID
    6212524
  • NDL Source Classification
    ZR26(科学技術--農林水産--水産)
  • NDL Call No.
    Z18-761
  • Data Source
    CJP  CJPref  NDL  J-STAGE  JASI 
Page Top