水田地帯に同所的に生息するシマヘビElaphe quadrivirgataとヤマカガシRhabdophis tigrinusの食物重複度  [in Japanese] FOOD RESOURCE OVERLAP BETWEEN THE TWO SYMPATRIC JAPANESE SNAKES (ELAPHE QUADRIVIRGATA AND RHABDOPHIS TIGRINUS) IN THE PADDY FIELDS  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 門脇 正史 KADOWAKI Seishi
    • 金沢大学自然科学研究科生命科学専攻環境生物学講座 Department of Environmental Biology and Health Science, Division of Life Sciences, Graduate School of Natural Science and Technology, Kanazawa University

Abstract

Niche breadth and overlap of diets among two sympatric snake species, Elaphe quadrivirgata and Rhabdophis tigrinus, in the paddy fields in Yamagata were studied for four years (1983-1986). Stomach contents were taken by forced regurgitation and classified into five major categories or eight minor categories : major categories mainly consist of taxonomical groups (e.g. frogs or voles) and minor categories indicate species in a major category. In the major categories, frogs were found to be the most dominant for both E. quadrivirgata and R. tigrinus with food niche breadth, 0.331 (E. quadrivirgata) and 0.441 (R. tigrinus). Food resource overlap was 0.879 in the major categories. In the minor categories, Japanese tree frogs, Hyla japonica were most dominant among the two snake species with food niche breadth, 0.513 (E. quadrivirgata) and 0.600 (R. tigrinus). Food resource overlap was 0.875. Thus, the food breadth was slightly wider among R. tigrinus than E. quadrivirgata with high food resource overlap in both categories. No difference in food size and the distribution of the captured spots was found between the two snake species. Seasonal niche overlap was high (0.788). Abundant frogs as prey items of the snakes would permit a high overlap of food resources between the two snake species in the field studied.

Journal

  • JAPANESE JOURNAL OF ECOLOGY

    JAPANESE JOURNAL OF ECOLOGY 42(1), 1-7, 1992

    The Ecological Society of Japan

References:  26

Cited by:  2

Codes

  • NII Article ID (NAID)
    110001881894
  • NII NACSIS-CAT ID (NCID)
    AN00193852
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0021-5007
  • NDL Article ID
    3773969
  • NDL Source Classification
    RA48(生態--動物)
  • NDL Source Classification
    ZR3(科学技術--生物学--植物)
  • NDL Call No.
    Z18-43
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
Page Top