How predictable is evolution: repeatability and variability in salmonids

Within species, there is variability among individuals in their characteristics and resource use. This variability is frequently represented as discrete forms, or morphs, that have differences in genetics, physical characteristics, and resource use. The evolution of morphs within fish species has occurred independently dozens of times within lakes at northern latitudes. This phenomenon is perhaps most incredible within species of the family Salmonidae, as there are several salmonid species in which three or four co-occurring morphs have been observed. Although multiple morphs have evolved in several independent instances, it is unknown to what degree the process of evolution has been similar in each case. For example, it is unknown whether the evolution of multiple morphs is associated with particular features of the environment, or whether the morphs exhibit repeated patterns in terms of their physical characteristics and resource use. In this project, a meta-analysis collating data from studies addressing evolution of salmonid morphs in individual lakes will be used to address these questions.

Faculty Supervisor:

Dolph Schluter

Student:

Partner:

University of Glasgow

Discipline:

Life Sciences

Sector:

Education

University:

The University of British Columbia

Program: