魚類における子の保護の進化と保護者の性 EVOLUTION OF PARENTAL CARE IN FISHES WITH REFERENCE TO DETERMINANTS OF THE CARE-TAKER'S SEX

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Parental-care patterns of fishes are surveyed to examine their evolutionary courses and the factors influencing the care-taker's sex. The Agnatha are nonguarders, the Chondrichthyes are internal bearers (with internal fertilization), and in 99 (24%) out of 418 families of the Osteichthyes guarding, external bearing or internal bearing are exhibited in 69,21,and 24 families, respectively. Male care is the most common among guarders, but only females perform internal bearing. The care-taker's sex is believed to be determined primarily by the ancestral mating system and the method of care : 1. Because rates of gamete production are faster in males than in females, male mating territories will predominate among nonguarders. From ancestors of this mating system, guarding by males but bearing by females will evolve, because males can take care of multiple clutches by guarding but not by bearing. 2. A portion of external bearing is derived from guarding, and prolonged guarding after the end of internal bearing is rarely developed in fishes. The sexes of the secondary care-takers are usually the same as those of the ancestral ones, but are also influenced by the new methods of care and the ancestral mating systems. These and other predictions are examined in relation to current hypotheses.

収録刊行物

  • 日本生態学会誌

    日本生態学会誌 37(2), 133-148, 1987

    一般社団法人 日本生態学会

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    110001881811
  • NII書誌ID(NCID)
    AN00193852
  • 本文言語コード
    JPN
  • 資料種別
    雑誌論文
  • ISSN
    0021-5007
  • NDL 記事登録ID
    3158706
  • NDL 刊行物分類
    RA48(生態--動物)
  • NDL 雑誌分類
    ZR3(科学技術--生物学--植物)
  • NDL 請求記号
    Z18-43
  • データ提供元
    CJP引用  NDL  NII-ELS  J-STAGE 
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