Date of Award

2010

Degree Type

Thesis

Degree Name

M.Sc.

Department

Biological Sciences

First Advisor

Corkum, Lynda (Biological Sciences)

Keywords

Ecology.

Rights

CC BY-NC-ND 4.0

Abstract

There are several modalities through which fish can communicate, but oftentimes they rely primarily on chemical and visual signaling. The Round Goby (Neogobius melanostomus) is a prolific invader of the Laurentian Great Lakes. My goal was to examine the behavioural responses of this species to signals from conspecifics. Using behavioural assays, I found that visual signals (i.e. nuptial colouration) rather than chemical signals (i.e. urine) from males were attractive to reproductive females. I also examine the attraction of juveniles to eggs odours; individuals significantly preferred conspecific to heterospecific odours. Lastly, I compare the allometric relationships between pectoral fins and body length in males and females, which may contribute to the reproductive success of an individual. My research improves our understanding of the behavioural ecology of an invasive species of fish.

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