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Primates

, Volume 23, Issue 2, pp 153–170 | Cite as

Food and nutritional condition of free ranging Japanese monkeys on Koshima Islet during winter

  • Toshitaka Iwamoto
Article

Abstract

A female with infant was chosen as material for study in an attempt to assess the nutritional condition of free ranging Japanese monkeys during winter. Her daily food composition, dry weight intake and nutritional (protein, lipid, carbohydrate, ash and calorie) intake were measured monthly (October to March). About 90% and 8% of the autumn diet consisted of fruits and invertebrate animals, respectively, while 70% of the winter diet (February) consisted of leaves of evergreen trees.

Comparing the daily protein intake of this focal female with the requirement level estimated from references, only October and November represented months fulfilling this level. Also, there was a remarkable decrease in lipid intake towards winter. These results coincided well with the observed body weight loss in the female and the increasing feeding activity of her baby towards winter. It is suggested that such seasonal malnutrition of the mother might affect population parameters such as the infant mortality.

Keywords

Nutritional Condition Infant Mortality Protein Intake Food Composition Body Weight Loss 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Japan Monkey Centre 1982

Authors and Affiliations

  • Toshitaka Iwamoto
    • 1
  1. 1.Department of BiologyMiyazaki UniversityMiyazakiJapan

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