Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMarangaby, Mahamat-
dc.description.abstractThe purpose of this thesis was to investigate intraspecific variation of life history traits in the electric knifefish Brachyhypopomus occidentalis under natural conditions, and to explore how individuals optimize their reproduction and brain size under varying predation risks. In the first chapter, I describe the reproductive biology of B. occidentalis, using several reproductive traits selected in both females and males to provide insight on the reproductive effort of mature knifefish. I provide field evidence supporting the hypothesis that predation risk environment and geographical isolation drive variation in female reproductive strategies. In the second chapter, I explore whether predation risk and drainage contributed to brain mass variation B. occidentalis. I also explore how ontogenetic scaling relationships influence brain mass, and how this association may have been affected by predation. I show that predation risk is an important driver of brain mass variation and discuss the potential implications for the fish and other highly encephalized vertebrates.en_US
dc.subjectLife historyen_US
dc.subjectbrain massen_US
dc.subjectexpensive tissuesen_US
dc.titleIntraspecific variation in life history traits of the panamanian electric fish Brachyhypopomus Occidentalisen_US
dc.description.degreeMaster of Science (M.Sc.) in Biologyen_US
dc.publisher.grantorLaurentian University of Sudburyen_US
Appears in Collections:Biology - Master's Theses

Files in This Item:
File Description SizeFormat 
Marangaby Mahamat M.Sc. Biology Thesis Final - May 25.pdf6.86 MBAdobe PDFThumbnail

Items in LU|ZONE|UL are protected by copyright, with all rights reserved, unless otherwise indicated.