Chapter

Frugivores and seed dispersal

Volume 15 of the series Tasks for vegetation science pp 83-92

Selection on plant fruiting traits by brown capuchin monkeys: a multivariate approach

  • Charles H. JansonAffiliated withDepartment of Zoology, University of Washington
  • , Edmund W. StilesAffiliated withDepartment of Biological Sciences and Bureau of Biological Research, Rutgers University
  • , Douglas W. WhiteAffiliated withDepartment of Biological Sciences and Bureau of Biological Research, Rutgers University

* Final gross prices may vary according to local VAT.

Get Access

Abstract

We present the use of a recently developed multivariate method (Lande and Arnold, 1983) to estimate selection on plant fruiting traits caused by seed dispersal via wild brown capuchin monkeys (Cebus apella). There was significant selection on some traits influencing the quality of individual fruits (energy content per fruit, carbohydrate and protein concentrations) as well as on spatial aspects of fruit displays (crown size, tree density and distribution). In several cases, the results of this multivariate analysis differed markedly from those of univariate analyses on the same data, in which the effects of correlated variables can obscure the selection coefficients. The feeding behavior of capuchins and birds appears to be affected differently by various plant fruiting traits, but no direct comparison can be made without a comparable multivariate analysis of seed crop removal by birds.

Keywords

capuchin monkey seed dispersal seed removal fruit choice fruiting traits multivariate analysis univariate analysis natural selection selection coefficients bird correlated traits