The Comparative Effects of a Thermal Gradient on the Age and Growth Characteristics of Largemouth Bass (Micropterus Nigricans), and Atlantic Cod (Gadus Morhua)

Author

Whitney Hall

Date of Award

2025

Type

Thesis

Major

Master of Science

Degree Type

Master of Science in Biology

Department

Biology

First Advisor

Dr. Michael Newbrey

Second Advisor

Dr. Jennifer Newnrey

Third Advisor

Ashley Desensi

Abstract

Thermal gradients impact fishes differently, due to variations in ecological niches and physiological adaptations. I assessed the effects of temperature on Largemouth Bass (Micropterus nigricans) and Atlantic Cod (Gadus morhua) using data from peer-reviewed journals, state records, and fisheries agencies. For Largemouth Bass, I analyzed the relationships between air temperature (MAT_min°C, MAT24hr°C, and MAT_max°C), and growth parameters including maximum length and weight, growth rate (K), longevity, and total length-at-ages 3, 5, and 8 years (TLAge_3,5,8), using least squares regression. Significant correlations were found between all temperature and growth metrics. Positive correlations were found between the thermal indices and TLAge_3,5,8, growth rate, and maximum size but negative relationships were found between the thermal indices and longevity. In Atlantic Cod, analyses were limited by insufficient data on older age classes, geographic coverage, and environmental variables. These limitations prevented analyses and highlighted the need for management strategies that protect older individuals.

Recommended Citation

Hall, Whitney, "The Comparative Effects of a Thermal Gradient on the Age and Growth Characteristics of Largemouth Bass (Micropterus Nigricans), and Atlantic Cod (Gadus Morhua)" (2025). Theses and Dissertations. 685.
https://csuepress.columbusstate.edu/theses_dissertations/685