Date of Award

1997

Degree Type

Thesis

Degree Name

M.Sc.

Department

Biological Sciences

First Advisor

Corkum, L. D.

Keywords

Biology, Ecology.

Rights

CC BY-NC-ND 4.0

Abstract

Immature and female round gobies dominated the trawl collections during 1996 with adult males being rare or absent. Annulus formation in the otolith was determined to occur at the end of May. Age 1 round gobies were consistently the most abundant age class followed by age 2. Only 3 individuals greater than age 2 were collected and age 0 individuals did not appear in the collections until the end of July. The relationship between otolith radius and standard length was non-linear and showed increased scatter with increased fish size. Back-calculation of size at age was most accurate using the non-linear body proportional hypothesis. Overall fits of the von Bertalanffy growth function were relatively poor because of the variability in size at age. It was not possible to determine differences between the growth rates for males and females because of limited data for the males. The spawning season for the round goby extends from May until early August in the Detroit River. A field experiment using artificial nests was used to examine reproductive success. (Abstract shortened by UMI.)Dept. of Biological Sciences. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1997 .M35. Source: Masters Abstracts International, Volume: 37-01, page: 0181. Adviser: L. D. Corkum. Thesis (M.Sc.)--University of Windsor (Canada), 1997.

Share

COinS