| TI: |
Title
Optimality modelling and quantitative genetics as alternatives
to study the evolution of foraging behaviours in insect herbivores
|
| AU: |
Author
Carriere, Y; Roitberg, BD |
| AF: |
Author Affiliation
Dep. Biol., McGill Univ., 1205 Dr. Penfield Ave., Montreal, PQ
H3A 1B1, Canada |
| SO: |
Source
EVOL. ECOL., vol. 10, no. 3, pp. 289- 305, 1996 |
| IS: |
ISSN
0269-7653 |
| AB: |
Abstract
Although the evolution of large-scale dispersal has received considerable
attention, we know very little about how natural selection influences
foraging behaviours in herbivorous insects. Host-selection behaviours
and within-habitat movements jointly determine foraging behaviours,
since host selection affects the allocation of time spent on a
particular host versus moving between these hosts. However, host
selection is generally a labile trait, whose expression is influenced
by the physiological state of the forager and hence, by characteristics
of the habitat. We discuss how the quantitative genetic concepts
can be used to study the evolution of such labile behaviours.
Since host responses depend on the physiological state of the
forager, it is argued that the state of the forager must be explicitly
considered when estimating the additive genetic basis of host-selection
behaviours. The lability of foraging behaviours increases the
difficulty of measuring the fitness consequence of variation in
the foraging phenotype in specific habitats. Therefore, it may
be difficult to rely exclusively on quantitative genetic methods
to test hypotheses about adaptive change in foraging behaviours
across different habitats. We provide a novel approach based on
optimality modelling to calculate the fitness consequence of variation
in the foraging phenotype across different habitats. This method,
in conjunction with quantitative genetics, can be used to test
hypotheses concerning the evolution of foraging behaviours. |
| LA: |
Language
English |
| SL: |
Summary Language
English |
| PY: |
Publication Year
1996 |
| PT: |
Publication Type
Journal Article |
| DE: |
Descriptors
Insecta; evolution; foraging behavior; herbivory; models |
| CL: |
Classification
D 04003 Modeling, mathematics, computer applications; Z 05156
Techniques; Y 25843 Insects |
| SF: |
Subfile
Ecology Abstracts; Entomology Abstracts; Animal Behavior Abstracts
|
| AN: |
Accession Number
3939386 |