Measures of food intake in mantled howling monkeys

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• 作者：José Eduardo Reynoso-Cruz ; Ariadna Rangel-Negrín ; Alejandro Coyohua-Fuentes…
• 关键词：Alouatta ; Bite counts ; Feeding ; Foraging ; Los Tuxtlas ; Time spent feeding
• 刊名：Primates
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：57
• 期：2
• 页码：161-166
• 全文大小：427 KB
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• 作者单位：José Eduardo Reynoso-Cruz (1) (2)
  Ariadna Rangel-Negrín (1)
  Alejandro Coyohua-Fuentes (1)
  Domingo Canales-Espinosa (1)
  Pedro Américo D. Dias (1)
  
  1. Laboratorio de Ecología del Comportamiento de Primates, Instituto de Neuroetología, Universidad Veracruzana, Av. Dr. Luis Castelazo Ayala S/N, Colonia Industrial Animas, 91190, Xalapa, Veracruz, Mexico
  2. Laboratorio de Adaptación Animal, Facultad de Psicología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Zoology
  Animal Ecology
  Behavioural Sciences
  Evolutionary Biology
  
• 出版者：Springer Japan
• ISSN：1610-7365

文摘

Food intake (i.e., the amount of food consumed by an individual) is a crucial measure for studying feeding behavior, but its measurement requires high visibility of individuals and long recording sessions, which are often difficult to accomplish under field conditions. As a consequence, studies on the feeding behavior of primates typically do not estimate food intake directly, and focus rather on studying dietary patterns through indirect measures of food intake, such as time spent feeding, number of food bites and food intake rates. The aim of the present study was to determine the validity of these estimators of food intake in mantled howling monkeys (Alouatta palliata) by comparing the estimations with the direct measurement of food intake. We recorded 97 feeding episodes of two male and two female adults, during which we determined the number of ingested food units (i.e., number of leaves and number of fruits), the number of bites taken and time spent feeding. After weighing units of food similar to those consumed, we calculated food intake and mean intake rates per food type (ripe fruits, unripe fruits, mature leaves, and young leaves). The number of bites taken by mantled howling monkeys during feeding episodes was strongly related to food intake, and this relationship was not affected by the type of food ingested. In contrast, neither time spent feeding nor food ingestion rate were related to food intake. These results suggest that the number of bites could be used as a valid proxy to study food intake in this species, whereas the other two measures are likely to yield inaccurate estimates of food intake.